WO2013154122A1 - Teleconverter lens and imaging device - Google Patents

Teleconverter lens and imaging device Download PDF

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Publication number
WO2013154122A1
WO2013154122A1 PCT/JP2013/060781 JP2013060781W WO2013154122A1 WO 2013154122 A1 WO2013154122 A1 WO 2013154122A1 JP 2013060781 W JP2013060781 W JP 2013060781W WO 2013154122 A1 WO2013154122 A1 WO 2013154122A1
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WO
WIPO (PCT)
Prior art keywords
lens
teleconverter
positive
refractive power
main
Prior art date
Application number
PCT/JP2013/060781
Other languages
French (fr)
Japanese (ja)
Inventor
山下敦司
尾崎雄一
Original Assignee
コニカミノルタ株式会社
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Filing date
Publication date
Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Publication of WO2013154122A1 publication Critical patent/WO2013154122A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/10—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment
    • G02B15/12—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment by adding telescopic attachments

Definitions

  • the present invention relates to a teleconverter lens and an image pickup apparatus, and more particularly to a teleconverter lens capable of changing the focal length of the main lens to the telephoto side by being mounted in front of the main lens provided in the image pickup apparatus and the like.
  • the present invention relates to an imaging apparatus.
  • Patent Documents 1 and 2 disclose teleconverter lenses that can change the focal length of the photographing lens to the telephoto side by being positioned in front of the photographing lens provided in the photographing device.
  • a portable terminal is generally mounted with an imaging device, and is used in various ways such as transferring an image captured by the imaging device or performing image processing on the portable terminal.
  • an imaging device incorporated therein is strictly required to be compact.
  • a single-focus optical system is mounted on an imaging device mounted on a portable terminal, which is difficult by itself, but some users have a desire to image a distant subject or the like, for example, There is a request whether a teleconverter lens as shown in Patent Documents 1 and 2 can be attached.
  • the present invention has been made in view of such problems, and an object thereof is to provide a teleconverter lens that has a conversion ratio of 3 or more and is sufficiently thin with respect to the thickness direction of the imaging device and an imaging device equipped with the teleconverter lens.
  • the teleconverter lens according to claim 1 is mounted on the subject side of the main lens and is a teleconverter lens capable of converting a focal length of the main lens.
  • the light enters the main lens via a relay unit, and the objective unit is arranged in order from the subject side, a first positive lens group having a positive refractive power, a negative refractive power
  • the relay unit includes a P2 lens having a positive refractive power and a reflective optical element for bending an optical path, which are arranged in order from the main lens side, and the first positive lens group. Consists of two or less lenses.
  • the teleconverter lens of the present invention can reduce the diameter of the optical system by adopting a so-called Kepler type re-imaging optical system as compared with a Galileo type without primary imaging. Furthermore, by using a bending optical system that bends the optical path with a reflective optical element such as a prism, the radial direction of the optical system can be matched with the thickness direction of the imaging device, which contributes to a reduction in the thickness of the device equipped with the imaging device. Further, by arranging the first positive lens group on the most object side, a small objective unit having a shorter overall length than the focal length can be obtained.
  • the first positive lens group can reduce the luminous flux, so that the axial ray height after the first positive lens group can be relatively low, It is possible to suppress the occurrence of spherical aberration, axial chromatic aberration, and the like.
  • a P1 lens having a positive refractive power and a reflective optical element in order from the main lens side in the relay unit, when the ray is traced back from the imaging position of the main lens, it is off-axis from the main lens.
  • the light beam can be refracted by a lens having a positive refracting power, so that the height of the light beam can be kept low, and the diameter of the subsequent reflecting optical element can be kept small, contributing to the miniaturization of the optical system.
  • This is particularly effective for reducing the thickness of the imaging device in the thickness direction.
  • the positive first lens group By constructing the positive first lens group with two or less lenses, it contributes to a reduction in thickness as compared with the construction with three or more lenses.
  • the teleconverter lens according to claim 2 is characterized in that, in the invention according to claim 1, the first positive lens group comprises a P2 lens having a positive refractive power.
  • the converter lens and the imaging device when the optical path is bent can be made thinner.
  • the teleconverter lens according to the second aspect of the present invention is characterized in that the P2 lens satisfies the expression (1).
  • fP2 focal length of the P2 lens
  • fO focal length of the objective unit
  • the value of the expression (1) exceeds the lower limit, the refractive power of the P2 lens does not become too strong, so that various aberrations such as spherical aberration, coma and astigmatism generated in the P2 lens increase. In addition, a change in optical performance when a lens processing error or a lens mounting error occurs is relatively small.
  • the value of the expression (1) is below the upper limit, it is possible to prevent an increase in the size of the optical system due to the refractive power of the P2 lens becoming too weak.
  • the P2 lens satisfies the expression (2).
  • the chromatic dispersion of the P2 lens can be reduced, so that the occurrence of axial chromatic aberration and lateral chromatic aberration generated in the P2 lens is reduced, and good optical performance is achieved. Can be obtained.
  • the teleconverter lens according to claim 5 is characterized in that, in the invention according to claim 1, the first positive lens group includes one negative lens and one positive lens.
  • the converter lens and the image pickup device at the time of optical path bending are not made too thick, and chromatic aberration, spherical aberration, and the like generated here are excellent. Can be corrected.
  • a teleconverter lens according to a sixth aspect of the present invention is the teleconverter lens according to any one of the first to fifth aspects, wherein the negative lens group, an aperture stop, and a second lens are located closer to the main lens than the first reflective optical element. It has a positive lens group.
  • the objective unit is arranged in order from the subject side as a first positive lens group, a negative lens group, and a second positive lens group, and an aperture stop is arranged between the negative lens group and the second positive lens group.
  • the teleconverter lens according to the sixth aspect wherein the negative lens group satisfies the expression (3). -1.3 ⁇ fGN / fO ⁇ -0.2 (3) Where fGN: focal length of the negative lens group fO: focal length of the objective unit
  • the refractive power of the negative lens group does not become too strong, so that various aberrations such as spherical aberration, coma aberration, and chromatic aberration can be suppressed.
  • the optical performance change when a lens processing error or a lens mounting error occurs is relatively small.
  • the value of the expression (3) exceeds the lower limit, it is possible to prevent an increase in the size of the optical system due to the refractive power of the negative lens group becoming too weak.
  • the negative lens group includes a cemented lens of an N1 lens having a negative refractive power and a P3 lens having a positive refractive power. It is characterized by that.
  • the negative lens group By making the negative lens group a cemented lens of a negative lens and a positive lens, chromatic aberration can be corrected satisfactorily, and productivity can be increased by reducing the number of groups when the lens is incorporated into a lens barrel. It is possible.
  • the teleconverter lens described in claim 9 is characterized in that, in the invention described in claim 8, the expression (4) is satisfied. 20 ⁇ vP3-vN1 ⁇ 29 (4) Where vp3: Abbe number of the P3 lens vN1: Abbe number of the N1 lens
  • the value of the expression (4) exceeds the lower limit, it is possible to suppress the under-axis chromatic aberration on the short wavelength side and the lateral chromatic aberration that increases the image height.
  • the value of the expression (4) is below the upper limit, it is possible to suppress over-axial chromatic aberration on the short wavelength side and lateral chromatic aberration that reduces the image height.
  • the second positive lens group satisfies the expression (5). 0.3 ⁇ fGP / fO ⁇ 2.0 (5)
  • fGP focal length of the second positive lens group
  • the value of the expression (5) exceeds the lower limit, the refractive power of the second positive lens group does not become too strong, and various aberrations such as spherical aberration, coma aberration, and chromatic aberration that occur here can be suppressed to be small. In addition, a change in optical performance when a lens processing error or a lens mounting error occurs is relatively small.
  • the value of the expression (5) is below the upper limit, it is possible to prevent the optical system from being enlarged due to the refractive power of the second positive lens group becoming too weak.
  • the teleconverter lens according to claim 11 is the invention according to any one of claims 6 to 10, wherein the second positive lens group includes a P4 lens having a positive refractive power and an N2 having a negative refractive power. It is characterized by comprising a cemented lens.
  • the second positive lens group By making the second positive lens group a cemented lens of a positive lens and a negative lens, chromatic aberration can be favorably corrected, or productivity can be reduced by reducing the number of groups when the lens is incorporated into the lens barrel. It can be increased.
  • the second positive lens group satisfies the expression (6). 6 ⁇ vN2 ⁇ vP4 ⁇ 35 (6)
  • vp4 Abbe number of the P4 lens
  • vN2 Abbe number of the N2 lens
  • the value of the expression (6) exceeds the lower limit, it is possible to suppress over-axial chromatic aberration on the short wavelength side and lateral chromatic aberration that increases the image height.
  • the value of the expression (6) is below the upper limit, it is possible to suppress an underaxial chromatic aberration on the short wavelength side and a chromatic aberration of magnification at which the image height is lowered.
  • a teleconverter lens according to a thirteenth aspect is the invention according to any one of the sixth to twelfth aspects, wherein an N3 lens having negative refractive power is disposed closer to the main lens side than the second positive lens group, and closer to the subject side.
  • a meniscus lens having a concave surface and a P5 lens having positive refractive power are arranged.
  • an N3 lens having negative refractive power is disposed on the main lens side from the second positive lens group, and the divergence effect of this N3 lens The light beam is bounced up, and then the subsequent meniscus lens further increases the light beam height within a short mechanical dimension and directs the concave surface toward the subject side, thereby reducing the angle of incidence on the meniscus lens. Aberrations occurring in the case are also kept small. Further, by arranging a P5 lens having a positive refractive power, the ray height can be adjusted to the object height of the relay unit, and as a result, the exit pupil image of the objective unit is set at the entrance pupil position of the relay unit. They can be formed and have a conjugate relationship with each other, and the off-axis light beams of the optical system before and after the primary imaging point can be efficiently transmitted without vignetting.
  • the teleconverter lens has a P1 lens having a positive refractive power on the most main lens side, and satisfies the expression (7). It is characterized by that. 1.0 ⁇ fP1 / fR ⁇ 2.1 (7) However, fP1: focal length of the P1 lens fR: focal length of the relay unit
  • the value of the expression (7) exceeds the lower limit, the refractive power of the P1 lens does not become too strong, so that various aberrations generated here can be suppressed, and the lens processing error and the lens can be incorporated into the lens barrel.
  • the change in optical performance when an error occurs can be relatively small.
  • the relay unit in the teleconverter lens according to any one of the first to fourteenth aspects, includes two optical elements having refractive power.
  • the optical system becomes simpler than when the relay unit is composed of three or more lenses, which contributes to miniaturization and weight reduction.
  • the amount of distortion and the like is smaller than when the relay unit is composed of one lens. Small and good optical performance can be obtained.
  • the teleconverter lens according to claim 16 is characterized in that, in the invention according to any one of claims 1 to 15, the number of reflections for bending the optical path is two or less.
  • the structure is not complicated, and the change in the optical performance due to the manufacturing error of the reflecting surface does not become remarkable, and relatively good productivity can be secured. I can do it.
  • a teleconverter lens according to a seventeenth aspect is the teleconverter lens according to any one of the first to sixteenth aspects, wherein the focal position shift when the subject distance is changed is determined with respect to a part of the teleconverter lens in the optical axis direction. It is characterized by correcting by moving to.
  • the focusable subject distance when focusing with only the main lens extended is farther than the focusable distance with the main lens alone. End up.
  • focusing can be performed by moving the lens in the teleconverter lens, shooting at a closer subject distance becomes possible, and the range of the shooting distance is expanded.
  • the teleconverter lens according to claim 18 is characterized in that, in the invention according to any one of claims 1 to 17, the expression (8) is satisfied. 3 ⁇ fTO / fM ⁇ 5.5 Where fTO: focal length of the entire system with the converter lens disposed on the subject side of the main lens fM: focal length of the main lens
  • the focal length becomes long when the teleconverter is mounted, so that a long-distance object can be further enlarged, and the background other than the subject is greatly blurred to achieve portrait photography and the like. There is an advantage that it can be performed automatically.
  • An image pickup apparatus is characterized in that the teleconverter lens according to any one of the first to eighteenth aspects is mounted.
  • the present invention it is possible to provide a teleconverter lens and an imaging apparatus that are sufficiently thin with respect to the thickness direction of the imaging apparatus while having a conversion ratio of 3 or more.
  • FIG. 1 is a cross-sectional view of an imaging optical system according to Example 1.
  • FIG. FIG. 4 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 1.
  • 6 is a cross-sectional view of an imaging optical system according to Example 2.
  • FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 2.
  • 6 is a cross-sectional view of an imaging optical system according to Example 3.
  • FIG. It is sectional drawing of the imaging optical system of Example 3 made into the 2 bending type.
  • FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 3.
  • 6 is a cross-sectional view of an imaging optical system according to Example 4.
  • FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 4.
  • 10 is a cross-sectional view of an imaging optical system according to Example 5.
  • FIG. FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 5.
  • 10 is a cross-sectional view of an imaging optical system according to Example 6.
  • FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 6.
  • FIG. 10 is a cross-sectional view of an imaging optical system according to Example 7.
  • FIG. 10 is an aberration diagram of the imaging optical system (spherical aberration (a), astigmatism (b), distortion (c)) in Example 7.
  • 10 is a cross-sectional view of an image pickup optical system according to Example 8.
  • FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 8.
  • 10 is a cross-sectional view of an image pickup optical system according to Example 9.
  • FIG. 10 is an aberration diagram of the imaging optical system (spherical aberration (a), astigmatism (b), distortion (c)) in Example 9.
  • FIG. 12 is a cross-sectional view of the imaging optical system according to Example 10.
  • FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system according to Example 10.
  • FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the main lens.
  • FIG. 1 is a perspective view showing a state in which the imaging optical system according to the present embodiment is attached to a portable terminal.
  • the portable terminal SF which is a thin smartphone, has a built-in imaging device (not shown) including the main lens ML.
  • the main lens ML has its subject side facing the front side (front side in FIG. 1) of the mobile terminal SF.
  • the teleconverter lens CL is arranged in an elongated casing BX attached along the rectangular plate-shaped body BD of the mobile terminal SF.
  • the body BD may be formed as a separate unit and attached to the body BD, or may be a part of the body BD.
  • the surface closest to the subject of the teleconverter lens CL is exposed from one end of the housing BX toward the subject.
  • the surface closest to the main lens of the teleconverter lens CL is coaxially opposed to the main lens ML.
  • the teleconverter lens CL and the main lens ML constitute an imaging optical system.
  • the teleconverter lens CL is composed of an objective part and a relay part, and a light beam incident on the teleconverter lens CL is primarily imaged by the objective part in the teleconverter lens CL and then enters the main lens ML via the relay part. It is like that.
  • the converter lens CL has a reflective optical element for bending the optical path.
  • the subject light that has passed through the teleconverter lens CL and the main lens ML is received by an image sensor (not shown) and converted into an electrical signal.
  • the subject can be imaged with only the main lens ML with the teleconverter lens CL removed, the imaging optical system having a longer focal length can be obtained by attaching the teleconverter lens CL.
  • a monitor (not shown) on the back of the mobile terminal SF displays an image based on an electrical signal output from the image sensor, functions as an electronic viewfinder, and displays a captured image in almost real time.
  • focusing, exposure, and the like are set as needed by driving the teleconverter lens CL and / or the main lens ML based on input from the photographer.
  • a release operation at a timing at which still image shooting is desired a still image is shot. As a result, the image data is recorded in the memory.
  • the teleconverter lens can also be applied to digital still cameras and video cameras.
  • the surface described with “*” after each surface number is a surface having an aspheric shape, and the shape of the aspheric surface has the vertex of the surface as the origin and the X axis in the optical axis direction.
  • the height in the direction perpendicular to the optical axis is represented by the following “Equation 1”.
  • the units in the table below are dimensions in mm and angles in degrees.
  • Example 1 shows lens data of Example 1.
  • a power of 10 for example, 2.5 ⁇ 10 ⁇ 02
  • E for example, 2.5E-02
  • FIG. 2 is a sectional view of the image pickup optical system according to the first embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6 And a seventh lens L7, an eighth lens L8, a second prism PS2 which is a reflective optical element, and a ninth lens L9 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+)
  • IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the seventh lens L7 are objective parts
  • the eighth lens L8 to the ninth lens L9 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like.
  • surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 1 Surface number: teleconverter lenses s1 to s27, main lenses s28 to s41 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 34.297 1.50 1.48749 70.4 4 -14.170 0.60 5 ⁇ 5.88 1.84666 23.8 6 ⁇ 0.83 7 -7.704 0.40 1.76182 26.6 8 4.453 0.01 1.51400 42.8 9 4.453 1.30 1.72916 54.7 10 -34.445 0.85 11 (Aperture) ⁇ 0.00 12 3.827 2.50 1.59270 35.4 13 -5.615 0.01 1.51400 42.8 14 -5.615 0.55 1.59349 67.0 15 3.186 0.74 16 * 2.316 1.62 1.63469 23.9 17 * 1.903 4.36 18 * 5.240 2.12 1.54470 56.2 19 * 28.020 7.80 20 * -17.997 2.40 1.54470 56.2 21
  • FIG. 3 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram is a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens (focal length 4.33 mm) having the aberration characteristics shown in FIG.
  • the dotted line represents the amount of spherical aberration with respect to the g line
  • the solid line represents the amount of spherical aberration with respect to the d line.
  • the solid line S represents the sagittal plane
  • the dotted line M represents the meridional plane (the same applies hereinafter).
  • any one of the first positive lens group GR1 (+), the negative lens group GR ( ⁇ ), and the second positive lens group GR2 (+) is moved in the direction of the optical axis in an infinite manner. Focusing from a distance to a finite distance can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved.
  • the magnification is 3.50
  • the primary image formation point position is 6.21 mm from the side of the main lens side of the seventh lens L7 to the main lens side (paraxial). value).
  • FIG. 4 is a sectional view of the image pickup optical system according to the second embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like.
  • surface number 8 represents an adhesive for the cemented lens.
  • Example 2 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 14.687 1.77 1.49746 63.7 4 -20.720 0.20 5 ⁇ 6.27 1.84666 23.8 6 ⁇ 1.22 7 -5.653 0.45 1.80406 25.7 8 3.716 0.01 1.51400 42.8 9 3.716 0.82 1.72869 49.1 10 666.102 1.13 11 (Aperture) ⁇ 0.31 12 54.195 1.37 1.66906 29.4 13 -3.877 0.50 14 -3.147 0.45 1.58477 43.4 15 -5.984 0.20 16 8.102 1.26 1.61474 34.1 17 44.525 0.28 18 * 3.429 1.62 1.54470 56.2 19 * 1.805 8.35 20 * 4.688 1.82 1.54470 56.2 21 *
  • FIG. 5 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved.
  • the magnification is 3.50
  • the primary imaging point position is 1.56 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 6 is a sectional view of the image pickup optical system according to the third embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6
  • a seventh lens L7 that is a meniscus lens having a concave surface facing the object side
  • an eighth lens L8 (P5 lens) a ninth lens L9
  • a second prism PS2 that is a reflective optical element
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like.
  • surface numbers 8 and 13 represent adhesives for the cemented lens.
  • the teleconverter lens CL of the present embodiment has a two-axis bending structure using two prisms PS1 and PS2.
  • the teleconverter lens CL has one optical axis only using the second prism PS2. It may be bent. The bending is preferably performed on the short side of the image sensor.
  • Example 3 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 13.736 1.76 1.48749 70.4 4 -19.457 0.50 5 ⁇ 6.31 1.84666 23.8 6 ⁇ 1.12 7 -7.046 0.45 1.80518 25.5 8 7.838 0.01 1.51400 42.8 9 7.838 0.80 1.74330 49.2 10 -51.429 1.39 11 (Aperture) ⁇ 1.57 12 7.869 1.13 1.67270 32.2 13 -8.673 0.01 1.51400 42.8 14 -8.673 0.57 1.59349 67.0 15 -31.068 0.44 16 * 4.037 2.50 1.54470 56.2 17 * 1.841 2.11 18 * -3.397 2.19 1.54470 56.2 19 * -3.972 1.32 20 * 5.125 2.08 1.5
  • FIG. 8 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved.
  • the magnification is 3.50
  • the primary imaging point position is a position of 3.67 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 9 is a sectional view of the image pickup optical system according to the fourth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6
  • a seventh lens L7 that is a meniscus lens having a concave surface facing the object side
  • an eighth lens L8 (P5 lens) a ninth lens L9
  • a second prism PS2 that is a reflective optical element
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like.
  • surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 4 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 13.684 1.75 1.49866 79.8 4 -19.742 0.50 5 ⁇ 6.27 1.84666 23.8 6 ⁇ 1.10 7 -7.103 0.45 1.80481 27.6 8 7.500 0.01 1.51400 42.8 9 7.500 0.80 1.73745 48.5 10 -50.730 1.33 11 (Aperture) ⁇ 1.73 12 11.121 0.95 1.67576 30.9 13 -6.198 0.01 1.51400 42.8 14 -6.198 0.45 1.58661 40.5 15 -42.055 0.31 16 * 3.342 2.50 1.54470 56.2 17 * 1.836 2.28 18 * -3.130 2.00 1.54470 56.2 19 * -3.615 1.60 20 * 5.170 1.94 1.54470
  • FIG. 10 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • magnification is 3.50
  • the primary image formation point position is 3.87 mm from the side of the main lens side of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 11 is a sectional view of the image pickup optical system according to the fifth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power;
  • a sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element.
  • Second prism P 2 consisting of a tenth lens L10 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
  • FIG. 12 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • the magnification is 3.50
  • the primary imaging point position is 4.24 mm from the main lens side surface of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 13 is a sectional view of the image pickup optical system according to the sixth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power;
  • a sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element.
  • Second prism P 2 consisting of a tenth lens L10 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 6 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 12.039 2.04 1.48749 70.4 4 -23.728 0.59 5 ⁇ 6.93 1.84666 23.8 6 ⁇ 1.10 7 -9.466 0.45 1.80518 25.5 8 7.770 0.01 1.51400 42.8 9 7.770 2.45 1.74330 49.2 10 52.668 0.20 11 (Aperture) ⁇ 2.60 12 8.494 1.34 1.67270 32.2 13 -7.619 0.01 1.51400 42.8 14 -7.619 0.50 1.59349 67.0 15 -270.235 0.37 16 * 3.603 2.43 1.54470 56.2 17 * 1.868 2.12 18 * -4.339 2.50 1.54470 56.2 19 * -6.091 3.73 20 * 5.165 1.75 1.54470
  • FIG. 14 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • magnification is 5.01
  • the primary imaging point position is 4.21 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 15 is a sectional view of the image pickup optical system according to the seventh embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6
  • a seventh lens L7 that is a meniscus lens having a concave surface facing the subject
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 7 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 59.836 3.00 1.48749 70.4 4 -15.256 1.28 5 ⁇ 6.85 1.84666 23.8 6 ⁇ 1.83 7 -4.929 0.90 1.80518 25.5 8 6.707 0.01 1.51400 42.8 9 6.707 3.55 1.74330 49.2 10 -8.478 0.23 11 (Aperture) ⁇ 1.07 12 8.581 1.82 1.67270 32.2 13 -14.982 0.01 1.51400 42.8 14 -14.982 0.86 1.59349 67.0 15 66.822 0.52 16 * 3.372 2.50 1.54470 56.2 17 * 1.739 2.21 18 * -2.669 1.59 1.54470 56.2 19 * -2.964 1.37 20 * 4.189 2.20
  • FIG. 16 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • the magnification is 3.51
  • the primary image formation point position is 3.45 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 17 is a cross-sectional view of the image pickup optical system according to the eighth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power;
  • a sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element.
  • Second prism P 2 consisting of a tenth lens L10 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 8 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 13.551 1.25 1.48749 70.4 4 -20.170 0.50 5 ⁇ 5.97 1.84666 23.8 6 ⁇ 0.92 7 -8.985 0.45 1.80518 25.5 8 5.920 0.01 1.51400 42.8 9 5.920 0.80 1.74330 49.2 10 40.929 0.20 11 (Aperture) ⁇ 1.93 12 7.506 1.03 1.67270 32.2 13 -8.572 0.01 1.51400 42.8 14 -8.572 0.45 1.59349 67.0 15 -33.269 0.31 16 * 3.865 2.49 1.54470 56.2 17 * 1.848 2.32 18 * -3.070 2.07 1.54470 56.2 19 * -3.518 3.62 20 * 5.204 2.20 1.54470 56.2
  • FIG. 18 is an aberration diagram of Example 8 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • magnification is 3.56
  • the primary imaging point position is 4.48 mm from the main lens side surface of the eighth lens L8 to the main lens side (paraxial). value).
  • Example 9 shows lens data of Example 9.
  • FIG. 19 is a cross-sectional view of the image pickup optical system according to the ninth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element.
  • a negative lens group GR ( ⁇ ) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction.
  • a second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power;
  • a sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element.
  • Second prism P 2 consisting of a tenth lens L10 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
  • Example 9 Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 15.181 1.56 1.48749 70.4 4 -17.125 0.50 5 ⁇ 6.07 1.84666 23.8 6 ⁇ 1.04 7 -6.762 0.90 1.80518 25.5 8 7.179 0.01 1.51400 42.8 9 7.179 2.12 1.74330 49.2 10 -46.868 0.20 11 (Aperture) ⁇ 1.89 12 7.623 1.31 1.67270 32.2 13 -9.064 0.01 1.51400 42.8 14 -9.064 0.57 1.59349 67.0 15 -28.700 0.41 16 * 4.006 2.50 1.54470 56.2 17 * 1.843 2.23 18 * -3.356 2.20 1.54470 56.2 19 * -3.952 2.56 20 * 5.237 1.85
  • FIG. 20 is an aberration diagram of Example 9 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • magnification is 3.55
  • the primary imaging point position is 3.32 mm from the side of the main lens side of the eighth lens L8 to the main lens side (paraxial). value).
  • FIG. 21 is a sectional view of the image pickup optical system according to the tenth embodiment.
  • the teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR ( ⁇ ) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups.
  • the teleconverter lens CL includes a first positive lens group GR1 (+) composed of a cemented lens obtained by cementing a lens L1 having negative refractive power and a lens L2 having positive refractive power, and reflective optics.
  • a negative lens group GR composed of a cemented lens in which the first prism PS1, which is an element, a third lens L3 (N1 lens) having negative refractive power, and a fourth lens L4 (P3 lens) having positive refractive power are cemented together.
  • a second positive lens group GR2 including a cemented lens in which a fifth lens L5 (P4 lens) having a positive refractive power and a sixth lens L6 (N2 lens) having a negative refractive power are cemented.
  • a second prism PS2 is a reflecting optical element, consisting of the first 11 lens L11 (P1 lens).
  • ML is a main lens provided in the imaging apparatus.
  • S denotes an aperture stop provided between the negative lens group GR ( ⁇ ) and the second positive lens group GR2 (+)
  • IM denotes an imaging surface of the imaging apparatus.
  • the first lens L1 to the ninth lens L9 are objective parts, and the tenth lens L10 to the eleventh lens L11 are relay parts.
  • Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like.
  • surface numbers 4, 10, and 15 represent cemented lens adhesives of the cemented lens.
  • Example 10 Surface number: teleconverter lenses s1 to s31, main lenses s32 to s45 Surface number (aspherical surface) R (mm) d (mm) nd ⁇ d 1 ⁇ 0.79 1.51633 64.2 2 ⁇ 0.50 3 38.849 0.50 1.85101 39.3 4 18.852 0.01 1.51400 42.8 5 18.850 1.50 1.49829 80.2 6 -11.132 0.50 7 ⁇ 5.43 1.84666 23.8 8 ⁇ 0.91 9 -5.647 0.63 1.80518 25.5 10 26.223 0.01 1.51400 42.8 11 26.223 1.76 1.74330 49.2 12 -11.007 0.20 13 (Aperture) ⁇ 0.62 14 11.917 3.18 1.67270 32.2 15 -7.885 0.01 1.51400 42.8 16 -7.885 0.85 1.59349 67.0 17 -21.994 0.38 18 * 3.807 2.50 1.54470 56.2 19 * 1.839 2.26 20 * -2.668
  • FIG. 22 is an aberration diagram of Example 10 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
  • the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used.
  • magnification is 3.50
  • the primary image formation point position is 4.38 mm from the main lens side surface of the ninth lens L9 to the main lens side (paraxial). value).
  • Table 11 shows values of each example corresponding to each conditional expression.
  • the present invention is not limited to the embodiments and examples described in the specification, and includes other embodiments, examples, and modified examples. It will be apparent to those skilled in the art from the technical idea. For example, even when a dummy lens having substantially no power is further provided, it is within the scope of the present invention.

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Abstract

Provided are: a teleconverter lens that is sufficiently thin in the thickness direction of an imaging device even while having a conversion rate of at least 3; and an imaging optical system. A light beam entering the teleconverter lens (CL) is subjected to primary image formation by means of an objective section within the teleconverter lens (CL), and then enters a main lens (ML) via a relay section. The objective section includes, in sequence from the subject side, a first lens group (GR1(+)) having a positive refractive power, and a negative lens group (GR(-)) having a negative refractive power. The relay section includes, in sequence from the main lens side, a P2 lens having a positive refractive power, and a reflecting optical element for bending the light path. Also, the first positive lens group (GR1(+)) comprises no more than two lenses.

Description

テレコンバータレンズ及び撮像装置Teleconverter lens and imaging device
　本発明は、テレコンバータレンズ及び撮像装置に関し、特に撮像装置等に備えられた主レンズ前方に装着することにより、主レンズの焦点距離を望遠側に変化させることのできるテレコンバータレンズ及びそれを搭載した撮像装置に関する。 The present invention relates to a teleconverter lens and an image pickup apparatus, and more particularly to a teleconverter lens capable of changing the focal length of the main lens to the telephoto side by being mounted in front of the main lens provided in the image pickup apparatus and the like. The present invention relates to an imaging apparatus.
　例えば撮影機器に設けられた撮影レンズの前方に位置させる事で、撮影レンズの焦点距離を望遠側に変化させさせることのできるテレコンバータレンズが、特許文献１、２に開示されている。 For example, Patent Documents 1 and 2 disclose teleconverter lenses that can change the focal length of the photographing lens to the telephoto side by being positioned in front of the photographing lens provided in the photographing device.
特開２００３－２４１０８７号公報JP 2003-241087 A 特開２０００－１３１６０９号公報JP 2000-131609 A
　ところで、近年、スマートフォンをはじめとする携帯端末が発売され、急速に拡大している。かかる携帯端末は、一般的に撮像装置を搭載し、これにより撮像した画像を転送したり、携帯端末上で画像処理を行うなど種々の用い方がなされている。しかるに、一般的な携帯端末は薄形であることから、それに内蔵される撮像装置はコンパクト化が厳しく要求されている。このため、携帯端末に搭載されている撮像装置には単焦点の光学系が搭載されており、単体では困難であるが、ユーザーによっては、遠方の被写体などを大きく撮像したいという希望もあり、例えば特許文献１，２に示すようなテレコンバータレンズを取り付けられないかという要請がある。 By the way, in recent years, mobile terminals such as smartphones have been released and are rapidly expanding. Such a portable terminal is generally mounted with an imaging device, and is used in various ways such as transferring an image captured by the imaging device or performing image processing on the portable terminal. However, since a general portable terminal is thin, an imaging device incorporated therein is strictly required to be compact. For this reason, a single-focus optical system is mounted on an imaging device mounted on a portable terminal, which is difficult by itself, but some users have a desire to image a distant subject or the like, for example, There is a request whether a teleconverter lens as shown in Patent Documents 1 and 2 can be attached.
　しかしながら、特許文献１，２のテレコンバータレンズは光学系の全長や径寸法が大きいので、携帯端末の撮像装置における主レンズの被写体側に突き出すようにして取り付けることになり、これにより撮影時の取り扱い性や携帯性に難点が生じていた。 However, since the teleconverter lenses of Patent Documents 1 and 2 have a large overall optical system length and diameter, they are attached so as to protrude toward the subject side of the main lens in the imaging device of the mobile terminal. There have been difficulties in performance and portability.
　本発明は、かかる問題点に鑑み、３以上の変換比を持ちながらも撮像装置の厚み方向に対し十分に薄いテレコンバータレンズ及びそれを搭載した撮像装置を提供することを目的とする。 The present invention has been made in view of such problems, and an object thereof is to provide a teleconverter lens that has a conversion ratio of 3 or more and is sufficiently thin with respect to the thickness direction of the imaging device and an imaging device equipped with the teleconverter lens.
　請求項１に記載のテレコンバータレンズは、主レンズより被写体側に装着され、前記主レンズの焦点距離を変換可能なテレコンバータレンズにおいて、前記テレコンバータレンズに入射した光束は対物部によって１次結像した後にリレー部を介して前記主レンズに入射するようになっており、前記対物部は、被写体側から順に配置された、正の屈折力を有する第１の正レンズ群、負の屈折力を有する負レンズ群を含み、前記リレー部は、前記主レンズ側から順に配置された、正の屈折力を有するＰ２レンズ、光路を折り曲げるための反射光学素子を含み、前記第１の正レンズ群は、２枚以下のレンズからなることを特徴とする。 The teleconverter lens according to claim 1 is mounted on the subject side of the main lens and is a teleconverter lens capable of converting a focal length of the main lens. After the image is formed, the light enters the main lens via a relay unit, and the objective unit is arranged in order from the subject side, a first positive lens group having a positive refractive power, a negative refractive power The relay unit includes a P2 lens having a positive refractive power and a reflective optical element for bending an optical path, which are arranged in order from the main lens side, and the first positive lens group. Consists of two or less lenses.
　本発明のテレコンバータレンズは、いわゆるケプラー型と呼ばれる、再結像光学系を採用する事で、１次結像を伴わないガリレオ型に比べ、光学系を小径化する事が出来る。さらにプリズム等の反射光学素子で光路を折り曲げる屈曲光学系とすることで、光学系の径方向を撮像装置の厚み方向に合わせることができ、撮像装置を搭載した装置の薄型化に寄与する。また、最も被写体側に第１の正レンズ群を配することで、焦点距離に比し全長の短い小型の対物部を得ることが出来る。さらに、焦点距離の望遠化により入射瞳系が増大しても、第１の正レンズ群で光束を細くできるため、第１の正レンズ群以降での軸上光線高さを比較的低くでき、球面収差や軸上色収差等の発生を小さく抑えることが可能である。また、リレー部に、主レンズ側から順に、正の屈折力を有するＰ１レンズ、反射光学素子と配置することで、主レンズの結像位置から光線を逆追跡した場合、主レンズからの軸外光束を正の屈折力を有するレンズによる屈折で光線高を低く抑えることが出来、その後に続く反射光学素子の径も小さく抑えることが出来、光学系の小型化に寄与する。特に撮像装置の厚み方向の薄型化に効果的である。前記正の第1レンズ群を2枚以下のレンズで構成することにより、3枚以上で構成する時よりも薄型化に寄与する。 The teleconverter lens of the present invention can reduce the diameter of the optical system by adopting a so-called Kepler type re-imaging optical system as compared with a Galileo type without primary imaging. Furthermore, by using a bending optical system that bends the optical path with a reflective optical element such as a prism, the radial direction of the optical system can be matched with the thickness direction of the imaging device, which contributes to a reduction in the thickness of the device equipped with the imaging device. Further, by arranging the first positive lens group on the most object side, a small objective unit having a shorter overall length than the focal length can be obtained. Further, even if the entrance pupil system increases due to the telephoto focal length, the first positive lens group can reduce the luminous flux, so that the axial ray height after the first positive lens group can be relatively low, It is possible to suppress the occurrence of spherical aberration, axial chromatic aberration, and the like. In addition, by arranging a P1 lens having a positive refractive power and a reflective optical element in order from the main lens side in the relay unit, when the ray is traced back from the imaging position of the main lens, it is off-axis from the main lens. The light beam can be refracted by a lens having a positive refracting power, so that the height of the light beam can be kept low, and the diameter of the subsequent reflecting optical element can be kept small, contributing to the miniaturization of the optical system. This is particularly effective for reducing the thickness of the imaging device in the thickness direction. By constructing the positive first lens group with two or less lenses, it contributes to a reduction in thickness as compared with the construction with three or more lenses.
　請求項２に記載のテレコンバータレンズは、請求項１に記載の発明において、前記第１の正レンズ群は、正の屈折力を有するＰ２レンズからなることを特徴とする。 The teleconverter lens according to claim 2 is characterized in that, in the invention according to claim 1, the first positive lens group comprises a P2 lens having a positive refractive power.
　前記正レンズ群を１枚の屈折力を有するＰ２レンズとすることで、光路折り曲げ時のコンバータレンズ及び撮像装置をより薄くすることができる。 By making the positive lens group a single P2 lens having a refractive power, the converter lens and the imaging device when the optical path is bent can be made thinner.
　請求項３に記載のテレコンバータレンズは、請求項２に記載の発明において、前記Ｐ２レンズは（１）式を満たすことを特徴とする。
　０．５　＜　ｆＰ２　／　ｆＯ　＜　１．５　　　（１）
ただし、
ｆＰ２：前記Ｐ２レンズの焦点距離
ｆＯ：前記対物部の焦点距離 According to a third aspect of the present invention, the teleconverter lens according to the second aspect of the present invention is characterized in that the P2 lens satisfies the expression (1).
0.5 <fP2 / fO <1.5 (1)
However,
fP2: focal length of the P2 lens fO: focal length of the objective unit
　（１）式の値が下限を上回ることで、前記Ｐ２レンズの屈折力が強くなりすぎないので、このＰ２レンズで発生する球面収差、コマ収差、非点収差等の諸収差の発生が大きくなり過ぎず、また、レンズの加工誤差やレンズの鏡胴への組み込み誤差が発生したときの光学性能変化が比較的小さくて済む。一方、（１）式の値が上限を下回ることで、前記Ｐ２レンズの屈折力が弱くなり過ぎることによる、光学系の大型化を防ぐことが出来る。 When the value of the expression (1) exceeds the lower limit, the refractive power of the P2 lens does not become too strong, so that various aberrations such as spherical aberration, coma and astigmatism generated in the P2 lens increase. In addition, a change in optical performance when a lens processing error or a lens mounting error occurs is relatively small. On the other hand, when the value of the expression (1) is below the upper limit, it is possible to prevent an increase in the size of the optical system due to the refractive power of the P2 lens becoming too weak.
　請求項４に記載のテレコンバータレンズは、請求項２又は３に記載の発明において、前記Ｐ２レンズは（２）式を満たすことを特徴とする。
　ｖＰ２　＞　６０　　（２）
ただし、
ｖＰ２：前記Ｐ２レンズのアッベ数 According to a fourth aspect of the present invention, in the invention according to the second or third aspect, the P2 lens satisfies the expression (2).
vP2> 60 (2)
However,
vP2: Abbe number of the P2 lens
　前記Ｐ２レンズのアッベ数が（２）式を満たすことにより、前記Ｐ２レンズの色分散を小さく出来るので、前記Ｐ２レンズで発生する軸上色収差や倍率色収差の発生を小さく抑え、良好な光学性能を得ることが出来る。 When the Abbe number of the P2 lens satisfies the expression (2), the chromatic dispersion of the P2 lens can be reduced, so that the occurrence of axial chromatic aberration and lateral chromatic aberration generated in the P2 lens is reduced, and good optical performance is achieved. Can be obtained.
　請求項５に記載のテレコンバータレンズは、請求項１に記載の発明において、前記第１の正レンズ群は、負レンズ１枚と正レンズ１枚からなることを特徴とする。 The teleconverter lens according to claim 5 is characterized in that, in the invention according to claim 1, the first positive lens group includes one negative lens and one positive lens.
　前記第１の正レンズ群を負レンズ１枚と正レンズ１枚で構成することにより、光路折り曲げ時のコンバータレンズ及び撮像装置を厚くし過ぎることなく、ここで発生する色収差や球面収差等を良好に補正することができる。 By configuring the first positive lens group with one negative lens and one positive lens, the converter lens and the image pickup device at the time of optical path bending are not made too thick, and chromatic aberration, spherical aberration, and the like generated here are excellent. Can be corrected.
　請求項６に記載のテレコンバータレンズは、請求項１～５のいずれかに記載の発明において、前記第１の反射光学素子より前記主レンズ側に、前記負レンズ群、開口絞り、第２の正レンズ群を有することを特徴とする。 A teleconverter lens according to a sixth aspect of the present invention is the teleconverter lens according to any one of the first to fifth aspects, wherein the negative lens group, an aperture stop, and a second lens are located closer to the main lens than the first reflective optical element. It has a positive lens group.
　前記対物部を被写体側から順に、第１の正レンズ群、負レンズ群、第２の正レンズ群という配置とし、開口絞りを負レンズ群と第２の正レンズ群間に配置することで、前玉径が大きくなり過ぎず、諸収差が良好に補正された光学系を得ることが出来る。 The objective unit is arranged in order from the subject side as a first positive lens group, a negative lens group, and a second positive lens group, and an aperture stop is arranged between the negative lens group and the second positive lens group. An optical system in which the front lens diameter does not become too large and various aberrations are corrected well can be obtained.
　請求項７に記載のテレコンバータレンズは、請求項６に記載の発明において、前記負レンズ群は（３）式を満たすことを特徴とする。
　－１．３　＜　ｆＧＮ　／　ｆＯ　＜　－０．２　　　（３）
但し
ｆＧＮ：前記負レンズ群の焦点距離
ｆＯ：前記対物部の焦点距離 According to a seventh aspect of the present invention, there is provided the teleconverter lens according to the sixth aspect, wherein the negative lens group satisfies the expression (3).
-1.3 <fGN / fO <-0.2 (3)
Where fGN: focal length of the negative lens group fO: focal length of the objective unit
　（３）式の値が上限を下回ることで、前記負レンズ群の屈折力が強くなり過ぎないので、ここで発生する球面収差、コマ収差や色収差等の諸収差を小さく抑えることが出来、また、レンズの加工誤差やレンズの鏡胴への組み込み誤差が発生したときの光学性能変化が比較的小さくて済む。一方、（３）式の値が下限を上回ることで、前記負レンズ群の屈折力が弱くなり過ぎることによる、光学系の大型化を防ぐことが出来る。 When the value of the expression (3) is less than the upper limit, the refractive power of the negative lens group does not become too strong, so that various aberrations such as spherical aberration, coma aberration, and chromatic aberration can be suppressed. The optical performance change when a lens processing error or a lens mounting error occurs is relatively small. On the other hand, when the value of the expression (3) exceeds the lower limit, it is possible to prevent an increase in the size of the optical system due to the refractive power of the negative lens group becoming too weak.
　請求項８に記載のテレコンバータレンズは、請求項６又は７に記載の発明において、前記負レンズ群は、負の屈折力を有するＮ１レンズと正の屈折力を有するＰ３レンズの接合レンズからなることを特徴とする。 According to an eighth aspect of the present invention, in the invention according to the sixth or seventh aspect, the negative lens group includes a cemented lens of an N1 lens having a negative refractive power and a P3 lens having a positive refractive power. It is characterized by that.
　前記負レンズ群を、負レンズと正レンズの接合レンズとすることで、色収差を良好に補正することができ、またレンズの鏡胴への組み込み時の群数を減らして生産性を高めたりすることが可能である。 By making the negative lens group a cemented lens of a negative lens and a positive lens, chromatic aberration can be corrected satisfactorily, and productivity can be increased by reducing the number of groups when the lens is incorporated into a lens barrel. It is possible.
　請求項９に記載のテレコンバータレンズは、請求項８に記載の発明において、（４）式を満たすことを特徴とする。
　２０　＜　ｖＰ３　－　ｖＮ１　＜　２９　　　（４）
但し
ｖｐ３：前記Ｐ３レンズのアッベ数
ｖＮ１：前記Ｎ１レンズのアッベ数 The teleconverter lens described in claim 9 is characterized in that, in the invention described in claim 8, the expression (4) is satisfied.
20 <vP3-vN1 <29 (4)
Where vp3: Abbe number of the P3 lens vN1: Abbe number of the N1 lens
　（４）式の値が下限を上回ることにより、短波長側のアンダーな軸上色収差や像高が高くなる倍率色収差を抑えることができる。一方、（４）式の値が上限を下回ることにより、短波長側のオーバーな軸上色収差や像高が低くなる倍率色収差を抑えることができる。 When the value of the expression (4) exceeds the lower limit, it is possible to suppress the under-axis chromatic aberration on the short wavelength side and the lateral chromatic aberration that increases the image height. On the other hand, when the value of the expression (4) is below the upper limit, it is possible to suppress over-axial chromatic aberration on the short wavelength side and lateral chromatic aberration that reduces the image height.
　請求項１０に記載のテレコンバータレンズは、請求項６～９のいずれかに記載の発明において、前記第２の正レンズ群は（５）式を満たすことを特徴とする。
　０．３　＜　ｆＧＰ　／　ｆＯ　＜　２．０　　　（５）
但し
ｆＧＰ：前記第２の正レンズ群の焦点距離 According to a tenth aspect of the present invention, in the invention according to any one of the sixth to ninth aspects, the second positive lens group satisfies the expression (5).
0.3 <fGP / fO <2.0 (5)
Where fGP: focal length of the second positive lens group
　（５）式の値が下限を上回ることで、前記第２の正レンズ群の屈折力が強くなり過ぎないので、ここで発生する球面収差、コマ収差や色収差等の諸収差を小さく抑えることが出来、また、レンズの加工誤差やレンズの鏡胴への組み込み誤差が発生したときの光学性能変化が比較的小さくて済む。一方、（５）式の値が上限を下回ることで、前記第２の正レンズ群の屈折力が弱くなり過ぎることによる、光学系の大型化を防ぐことが出来る。 When the value of the expression (5) exceeds the lower limit, the refractive power of the second positive lens group does not become too strong, and various aberrations such as spherical aberration, coma aberration, and chromatic aberration that occur here can be suppressed to be small. In addition, a change in optical performance when a lens processing error or a lens mounting error occurs is relatively small. On the other hand, when the value of the expression (5) is below the upper limit, it is possible to prevent the optical system from being enlarged due to the refractive power of the second positive lens group becoming too weak.
　請求項１１に記載のテレコンバータレンズは、請求項６～１０のいずれかに記載の発明において、前記第２の正レンズ群は、正の屈折力を有するＰ４レンズと負の屈折力を有するＮ２レンズの接合レンズからなることを特徴とする。 The teleconverter lens according to claim 11 is the invention according to any one of claims 6 to 10, wherein the second positive lens group includes a P4 lens having a positive refractive power and an N2 having a negative refractive power. It is characterized by comprising a cemented lens.
　前記第２の正レンズ群を、正レンズと負レンズの接合レンズとすることで、色収差を良好に補正することができたり、レンズの鏡胴への組み込み時の群数を減らして生産性を高めたりすることが可能である。 By making the second positive lens group a cemented lens of a positive lens and a negative lens, chromatic aberration can be favorably corrected, or productivity can be reduced by reducing the number of groups when the lens is incorporated into the lens barrel. It can be increased.
　請求項１２に記載のテレコンバータレンズは、請求項１１に記載の発明において、前記第２の正レンズ群は（６）式を満たすことを特徴とする。
　６　＜　ｖＮ２　－　ｖＰ４　＜　３５　　　（６）
但し
ｖｐ４：前記Ｐ４レンズのアッベ数
ｖＮ２：前記Ｎ２レンズのアッベ数 According to a twelfth aspect of the present invention, in the invention according to the eleventh aspect, the second positive lens group satisfies the expression (6).
6 <vN2−vP4 <35 (6)
Where vp4: Abbe number of the P4 lens vN2: Abbe number of the N2 lens
（６）式の値が下限を上回ることにより、短波長側のオーバーな軸上色収差や像高が高くなる倍率色収差を抑えることができる。一方、（６）式の値が上限を下回ることにより、短波長側のアンダーな軸上色収差や像高が低くなる倍率色収差を抑えることができる。 When the value of the expression (6) exceeds the lower limit, it is possible to suppress over-axial chromatic aberration on the short wavelength side and lateral chromatic aberration that increases the image height. On the other hand, when the value of the expression (6) is below the upper limit, it is possible to suppress an underaxial chromatic aberration on the short wavelength side and a chromatic aberration of magnification at which the image height is lowered.
　請求項１３に記載のテレコンバータレンズは、請求項６～１２のいずれかに記載の発明において、前記第２の正レンズ群より主レンズ側に、負の屈折力を有するＮ３レンズ、被写体側に凹面を向けたメニスカスレンズ、正の屈折力を有するＰ５レンズが配置されてなることを特徴とする。 A teleconverter lens according to a thirteenth aspect is the invention according to any one of the sixth to twelfth aspects, wherein an N3 lens having negative refractive power is disposed closer to the main lens side than the second positive lens group, and closer to the subject side. A meniscus lens having a concave surface and a P5 lens having positive refractive power are arranged.
　前記第２の正レンズ群を通過する光線高さは比較的低いため、前記第２の正レンズ群より主レンズ側に負の屈折力を有するＮ３レンズを配し、このＮ３レンズの発散効果で光線を跳ね上げ、次に後続の前記メニスカスレンズにより、短い機械的寸法の中でさらに光線高を高くするとともに、被写体側に凹面を向けることで、前記メニスカスレンズへの入射角を小さくし、ここで発生する収差も小さく抑えている。さらに正の屈折力を有するＰ５レンズを配することで光線高を前記リレー部の物体高に合わせこむ事が出来た結果、前記対物部の射出瞳の像を、前記リレー部の入射瞳位置に形成することができ、互いに共役関係となり、１次結像点の前後の光学系の軸外光束をケラレなく効率よく伝達することが出来る。 Since the height of the light beam passing through the second positive lens group is relatively low, an N3 lens having negative refractive power is disposed on the main lens side from the second positive lens group, and the divergence effect of this N3 lens The light beam is bounced up, and then the subsequent meniscus lens further increases the light beam height within a short mechanical dimension and directs the concave surface toward the subject side, thereby reducing the angle of incidence on the meniscus lens. Aberrations occurring in the case are also kept small. Further, by arranging a P5 lens having a positive refractive power, the ray height can be adjusted to the object height of the relay unit, and as a result, the exit pupil image of the objective unit is set at the entrance pupil position of the relay unit. They can be formed and have a conjugate relationship with each other, and the off-axis light beams of the optical system before and after the primary imaging point can be efficiently transmitted without vignetting.
　請求項１４に記載のテレコンバータレンズは、請求項１～１３までのいずれかに記載の発明において、前記最も主レンズ側に正の屈折力を有するＰ１レンズを有し、（７）式を満たすことを特徴とする。
　１．０　＜　ｆＰ１　／　ｆＲ　＜　２．１　　（７）
但し　
ｆＰ１：前記Ｐ１レンズの焦点距離
ｆＲ：前記リレー部の焦点距離 According to a fourteenth aspect of the present invention, in the invention according to any one of the first to thirteenth aspects, the teleconverter lens has a P1 lens having a positive refractive power on the most main lens side, and satisfies the expression (7). It is characterized by that.
1.0 <fP1 / fR <2.1 (7)
However,
fP1: focal length of the P1 lens fR: focal length of the relay unit
　（７）式の値が下限を上回ることで、前記Ｐ１レンズの屈折力が強くなり過ぎないので、ここで発生する諸収差を小さく抑えられるとともに、レンズの加工誤差やレンズの鏡胴への組み込み誤差が発生したときの光学性能変化が比較的小さくて済む。一方、（７）式の値が上限を上回ることで、前記Ｐ１レンズの屈折力を確保することが出来、光学系の大型化を防ぐことが出来るので好ましい。 When the value of the expression (7) exceeds the lower limit, the refractive power of the P1 lens does not become too strong, so that various aberrations generated here can be suppressed, and the lens processing error and the lens can be incorporated into the lens barrel. The change in optical performance when an error occurs can be relatively small. On the other hand, it is preferable that the value of the expression (7) exceeds the upper limit because the refractive power of the P1 lens can be secured and the enlargement of the optical system can be prevented.
　請求項１５に記載のテレコンバータレンズは、請求項１～１４までのいずれかに記載の発明において、前記リレー部を構成する屈折力を有する光学素子は２枚であることを特徴とする。 According to a fifteenth aspect of the present invention, in the teleconverter lens according to any one of the first to fourteenth aspects, the relay unit includes two optical elements having refractive power.
　前記リレー部を、３枚以上のレンズで構成するときよりも光学系が簡素となり、小型化や軽量化に寄与する一方、１枚のレンズで構成するときよりも、歪曲収差等の発生量が小さく、良好な光学性能を得ることが出来る。 The optical system becomes simpler than when the relay unit is composed of three or more lenses, which contributes to miniaturization and weight reduction. On the other hand, the amount of distortion and the like is smaller than when the relay unit is composed of one lens. Small and good optical performance can be obtained.
　請求項１６に記載のテレコンバータレンズは、請求項１～１５のいずれに記載の発明において、光路折り曲げのための反射回数が２回以下であることを特徴とする。 The teleconverter lens according to claim 16 is characterized in that, in the invention according to any one of claims 1 to 15, the number of reflections for bending the optical path is two or less.
　光路折り曲げのための反射回数を２回以下とすることにより、構造が複雑になったり、反射面の製造誤差による光学性能の変化が顕著にならず、比較的良好な生産性を確保することが出来る。 By setting the number of reflections for bending the optical path to 2 times or less, the structure is not complicated, and the change in the optical performance due to the manufacturing error of the reflecting surface does not become remarkable, and relatively good productivity can be secured. I can do it.
　請求項１７に記載のテレコンバータレンズは、請求項１～１６のいずれに記載の発明において、被写体距離が変化した際の焦点位置ずれを、前記テレコンバータレンズ内の一部のレンズを光軸方向に移動させることで補正することを特徴とする。 A teleconverter lens according to a seventeenth aspect is the teleconverter lens according to any one of the first to sixteenth aspects, wherein the focal position shift when the subject distance is changed is determined with respect to a part of the teleconverter lens in the optical axis direction. It is characterized by correcting by moving to.
　装着した結果、全系の焦点距離が長くなるテレコンバータにおいては、主レンズのみの繰り出しで合焦する際の合焦可能被写体距離が、主レンズ単体時の合焦可能距離よりも遠距離になってしまう。しかし、テレコンバータレンズ内のレンズを移動させることにより合焦を行うことができれば、より近い被写体距離での撮影が可能となり、撮影距離の範囲が広がる。 As a result of the installation, in a teleconverter that increases the focal length of the entire system, the focusable subject distance when focusing with only the main lens extended is farther than the focusable distance with the main lens alone. End up. However, if focusing can be performed by moving the lens in the teleconverter lens, shooting at a closer subject distance becomes possible, and the range of the shooting distance is expanded.
　請求項１８に記載のテレコンバータレンズは、請求項１～１７のいずれに記載の発明において、（８）式を満たすことを特徴とする。
　３　＜　ｆＴＯ　／　ｆＭ　＜　５．５
但し
ｆＴＯ：前記コンバータレンズを前記主レンズの被写体側に配置した状態の、全系の焦点距離
ｆＭ：前記主レンズの焦点距離 The teleconverter lens according to claim 18 is characterized in that, in the invention according to any one of claims 1 to 17, the expression (8) is satisfied.
3 <fTO / fM <5.5
Where fTO: focal length of the entire system with the converter lens disposed on the subject side of the main lens fM: focal length of the main lens
　（８）式を満たすことで、前記テレコンバータを装着した際、焦点距離が長くなるため、遠距離物体をより拡大することができ、また被写体以外の背景を大きくぼかしてポートレート撮影等を効果的に行うことができる、等の利点がある。 By satisfying the equation (8), the focal length becomes long when the teleconverter is mounted, so that a long-distance object can be further enlarged, and the background other than the subject is greatly blurred to achieve portrait photography and the like. There is an advantage that it can be performed automatically.
　請求項１９に記載の撮像装置は、請求項１～１８のいずれかに記載のテレコンバータレンズを搭載したことを特徴とする。 An image pickup apparatus according to a nineteenth aspect is characterized in that the teleconverter lens according to any one of the first to eighteenth aspects is mounted.
　本発明によれば、３以上の変換比を持ちながらも撮像装置の厚み方向に対し十分に薄いテレコンバータレンズ及び撮像装置を提供することができる。 According to the present invention, it is possible to provide a teleconverter lens and an imaging apparatus that are sufficiently thin with respect to the thickness direction of the imaging apparatus while having a conversion ratio of 3 or more.
本実施形態にかかる撮像光学系を携帯端末に取り付けた状態を示す斜視図である。It is a perspective view which shows the state which attached the imaging optical system concerning this embodiment to the portable terminal. 実施例１の撮像光学系の断面図である。1 is a cross-sectional view of an imaging optical system according to Example 1. FIG. 実施例１の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 4 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 1. 実施例２の撮像光学系の断面図である。6 is a cross-sectional view of an imaging optical system according to Example 2. FIG. 実施例２の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 2. 実施例３の撮像光学系の断面図である。6 is a cross-sectional view of an imaging optical system according to Example 3. FIG. ２回折り曲げタイプとした実施例３の撮像光学系の断面図である。It is sectional drawing of the imaging optical system of Example 3 made into the 2 bending type. 実施例３の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 3. 実施例４の撮像光学系の断面図である。6 is a cross-sectional view of an imaging optical system according to Example 4. FIG. 実施例４の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 4. 実施例５の撮像光学系の断面図である。10 is a cross-sectional view of an imaging optical system according to Example 5. FIG. 実施例５の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 5. 実施例６の撮像光学系の断面図である。10 is a cross-sectional view of an imaging optical system according to Example 6. FIG. 実施例６の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 6. 実施例７の撮像光学系の断面図である。FIG. 10 is a cross-sectional view of an imaging optical system according to Example 7. 実施例７の撮像光学系収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram of the imaging optical system (spherical aberration (a), astigmatism (b), distortion (c)) in Example 7. 実施例８の撮像光学系の断面図である。10 is a cross-sectional view of an image pickup optical system according to Example 8. FIG. 実施例８の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system of Example 8. 実施例９の撮像光学系の断面図である。10 is a cross-sectional view of an image pickup optical system according to Example 9. FIG. 実施例９の撮像光学系収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram of the imaging optical system (spherical aberration (a), astigmatism (b), distortion (c)) in Example 9. 実施例１０の撮像光学系の断面図である。FIG. 12 is a cross-sectional view of the imaging optical system according to Example 10. 実施例１０の撮像光学系の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 10 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion (c)) of the imaging optical system according to Example 10. 主レンズの収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。FIG. 6 is an aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the main lens.
　以下、本発明の実施形態を図面に基づいて説明する。図１は、本実施形態にかかる撮像光学系を携帯端末に取り付けた状態を示す斜視図である。例えば薄形のスマートフォンである携帯端末ＳＦは、主レンズＭＬを備えた撮像装置（不図示）を内蔵している。主レンズＭＬは、その被写体側面を携帯端末ＳＦの前方側（図１で手前側）に向けている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the imaging optical system according to the present embodiment is attached to a portable terminal. For example, the portable terminal SF, which is a thin smartphone, has a built-in imaging device (not shown) including the main lens ML. The main lens ML has its subject side facing the front side (front side in FIG. 1) of the mobile terminal SF.
　テレコンバータレンズＣＬは、携帯端末ＳＦの矩形板状のボディＢＤに沿って取り付けた細長い筐体ＢＸ内に、配置されている。尚、ボディＢＤと別ユニットとして形成され、ボディＢＤに装着されていても良いし、ボディＢＤの一部であっても良い。テレコンバータレンズＣＬの最も被写体側の面は、本例では筐体ＢＸの一端から被写体側に向かって露出している。一方、テレコンバータレンズＣＬの最も主レンズ側の面は、主レンズＭＬに同軸に対向している。テレコンバータレンズＣＬと主レンズＭＬとで撮像光学系を構成する。 The teleconverter lens CL is arranged in an elongated casing BX attached along the rectangular plate-shaped body BD of the mobile terminal SF. The body BD may be formed as a separate unit and attached to the body BD, or may be a part of the body BD. In this example, the surface closest to the subject of the teleconverter lens CL is exposed from one end of the housing BX toward the subject. On the other hand, the surface closest to the main lens of the teleconverter lens CL is coaxially opposed to the main lens ML. The teleconverter lens CL and the main lens ML constitute an imaging optical system.
　テレコンバータレンズＣＬは対物部とリレー部とで構成され、テレコンバータレンズＣＬに入射した光束はテレコンバータレンズＣＬ内で対物部により１次結像した後にリレー部を介して主レンズＭＬに入射するようになっている。また、コンバータレンズＣＬは光路を折り曲げるための反射光学素子を有している。テレコンバータレンズＣＬ及び主レンズＭＬを通過した被写体光は、不図示の撮像素子に受光されて電気信号に変換される。尚、テレコンバータレンズＣＬを取り外した状態で、主レンズＭＬのみでも被写体を撮像することができるが、テレコンバータレンズＣＬを取り付けることで、より長い焦点距離を備えた撮像光学系となる。 The teleconverter lens CL is composed of an objective part and a relay part, and a light beam incident on the teleconverter lens CL is primarily imaged by the objective part in the teleconverter lens CL and then enters the main lens ML via the relay part. It is like that. The converter lens CL has a reflective optical element for bending the optical path. The subject light that has passed through the teleconverter lens CL and the main lens ML is received by an image sensor (not shown) and converted into an electrical signal. Although the subject can be imaged with only the main lens ML with the teleconverter lens CL removed, the imaging optical system having a longer focal length can be obtained by attaching the teleconverter lens CL.
　携帯端末ＳＦ背面のモニタ（不図示）は、撮像素子から出力された電気信号に基づいて画像表示を行い、電子ファインダとして機能し、撮像画像を、ほぼリアルタイムに表示する。この状態で、随時、撮影者による入力に基づいて、テレコンバータレンズＣＬ及び／又は主レンズＭＬのレンズ駆動により合焦、露出等が設定される。更に、静止画撮影を行ないたいタイミングで、ユーザーがレリーズ操作を行うことにより、静止画像が撮影される。これにより画像データがメモリに記録される。 A monitor (not shown) on the back of the mobile terminal SF displays an image based on an electrical signal output from the image sensor, functions as an electronic viewfinder, and displays a captured image in almost real time. In this state, focusing, exposure, and the like are set as needed by driving the teleconverter lens CL and / or the main lens ML based on input from the photographer. Furthermore, when a user performs a release operation at a timing at which still image shooting is desired, a still image is shot. As a result, the image data is recorded in the memory.
　なお、上記実施形態及び各実施例における記述は、本発明に係る好適な例であり、これに限定されるものではない。又、本テレコンバータレンズはデジタルスチルカメラやビデオカメラにも適用可能である。 In addition, the description in the said embodiment and each Example is a suitable example which concerns on this invention, and is not limited to this. The teleconverter lens can also be applied to digital still cameras and video cameras.
（実施例）
　次に、上述した実施形態に好適な実施例について説明する。但し、以下に示す実施例により本発明が限定されるものではない。
ｆ：全系の焦点距離
Ｒ　：曲率半径（ｍｍ）
ｄ　：軸上面間隔（ｍｍ）
ｎd：レンズ材料のｄ線に対する屈折率
νd：レンズ材料のアッベ数 (Example)
Next, examples suitable for the above-described embodiment will be described. However, the present invention is not limited to the following examples.
f: Focal length R of entire system R: radius of curvature (mm)
d: Distance between shaft upper surfaces (mm)
n d : refractive index ν d of lens material with respect to d-line: Abbe number of lens material
　各実施例において、各面番号の後に「＊」が記載されている面が非球面形状を有する面であり、非球面の形状は、面の頂点を原点とし、光軸方向にＸ軸をとり、光軸と垂直方向の高さをｈとして以下の「数１」で表す。以下の表中の単位は寸法がｍｍ、角度が°である。 In each embodiment, the surface described with “*” after each surface number is a surface having an aspheric shape, and the shape of the aspheric surface has the vertex of the surface as the origin and the X axis in the optical axis direction. The height in the direction perpendicular to the optical axis is represented by the following “Equation 1”. The units in the table below are dimensions in mm and angles in degrees.
Figure JPOXMLDOC01-appb-M000001
 ただし、
Ａｉ：ｉ次の非球面係数
Ｒ　：曲率半径
Ｋ　：円錐定数
Figure JPOXMLDOC01-appb-M000001
 However,
Ai: i-order aspheric coefficient R: radius of curvature K: conic constant
（実施例１）
　実施例１のレンズデータを表１に示す。なお、これ以降（表のレンズデータを含む）において、１０のべき乗数（たとえば２．５×１０-02）を、Ｅ（たとえば２．５Ｅ－０２）を用いて表すものとする。図２は、実施例１の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、第６レンズＬ６と、第７レンズＬ７と、第８レンズＬ８と、反射光学素子である第２プリズムＰＳ２と、第９レンズＬ９（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第７レンズＬ７が対物部であり、第８レンズＬ８～第９レンズＬ９がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。尚、以下の表で、面番号８，１３は接合レンズの接着剤を表す。 Example 1
Table 1 shows lens data of Example 1. In the following (including the lens data in the table), a power of 10 (for example, 2.5 × 10 −02 ) is expressed using E (for example, 2.5E-02). FIG. 2 is a sectional view of the image pickup optical system according to the first embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6 And a seventh lens L7, an eighth lens L8, a second prism PS2 which is a reflective optical element, and a ninth lens L9 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the seventh lens L7 are objective parts, and the eighth lens L8 to the ninth lens L9 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the table below, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表１］
"実施例1"
面番号：テレコンバータレンズｓ１～ｓ２７，主レンズｓ２８～ｓ４１
面番号(非球面)    R(mm)   d(mm)    nd         νd
1                ∞        0.79    1.51633     64.2 
2                ∞        0.50        
3                34.297    1.50    1.48749     70.4 
4               -14.170    0.60        
5                ∞        5.88    1.84666     23.8 
6                ∞        0.83        
7               -7.704     0.40    1.76182     26.6 
8                4.453     0.01    1.51400     42.8 
9                4.453     1.30    1.72916     54.7 
10              -34.445    0.85        
11(絞り)        ∞         0.00        
12               3.827     2.50    1.59270     35.4 
13              -5.615     0.01    1.51400     42.8 
14              -5.615     0.55    1.59349     67.0 
15               3.186     0.74        
16  *            2.316     1.62    1.63469     23.9 
17  *            1.903     4.36        
18  *            5.240     2.12    1.54470     56.2 
19  *           28.020     7.80        
20  *          -17.997     2.40    1.54470     56.2 
21  *           -5.372     0.15        
22              ∞         7.26    1.84666     23.8 
23              ∞         0.15        
24  *           3.347      1.77    1.54470     56.2 
25  *           10.896     0.62        
26              ∞         0.79    1.84666     23.8 
27              ∞         0.64        
28              ∞         0.79    1.51633     64.1 
29              ∞         1.04        
30              1.676      0.63    1.54470     56.2 
31             -13.857     0.05        
32              4.012      0.28    1.63469     23.9 
33              1.559      0.57        
34             -36.876     0.31    1.63469     23.9 
35             -35.075     0.42
36             -6.434      0.86    1.54470     56.2 
37             -0.965      0.23
38             -2.637      0.45    1.53048     55.7 
39              1.582      0.64
40              ∞         0.30    1.51633     64.1 
41              ∞         0.39
像 

非球面係数
テレコンバータレンズ                
    第16面       第17面       第18面      第19面
K   0.000         0.000         0.000         0.000 
A4  -9.6904E-03  -1.7988E-02   -2.3608E-03   -1.8572E-03
A6  -8.8622E-04  -2.7015E-03   -2.2123E-04   -2.3530E-04
A8  -6.3446E-05   4.0452E-04    2.7228E-05    2.7768E-05
A10 -7.8616E-05  -5.8518E-04   -1.1477E-06   -1.0202E-06
A12

    第20面        第21面       第24面        第25面
K   0.000          0.000         0.000         0.000 
A4  8.4893E-03     5.7022E-03   -1.6021E-03   -2.6228E-03
A6  -2.2246E-04   -2.0831E-04   -7.8683E-04   -2.0884E-04
A8  -3.9324E-05   -1.0432E-05    1.6795E-04    8.8478E-05
A10 2.9115E-06     1.1320E-06   -2.2052E-05   -8.0500E-06
A12 -6.1635E-08    -2.5608E-08   1.1508E-06    7.2281E-07

主レンズ
    第30面      第31面        第32面      第33面      第34面
K   -0.025      -29.823       -30.000     -6.295       30.000
A4  5.4737E-03  2.9864E-02   -4.4484E-02  4.7985E-02  -1.2218E-01
A6  1.8802E-03  3.6878E-02   1.4564E-01  5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02 6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03 2.0372E-02
A12 -2.1868E-02  2.7062E-02  7.7790E-02  -4.1075E-03 -1.8554E-02
A14 8.4210E-03               -1.8876E-02 2.2070E-02  -6.3386E-04

    第35面      第36面      第37面      第38面      第39面
K   30.000       7.826      -4.059       -30.000      -12.523 
A4  -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02  -3.6784E-02
A6  3.0627E-03   2.0421E-02  5.1578E-02 -1.5539E-03   7.2592E-03
A8  1.9106E-02  -1.1047E-03 -1.1842E-02  2.1085E-03  -1.4441E-03
A10 1.6054E-02  -1.6207E-03  6.5318E-04 -1.9864E-04   1.4444E-04
A12 -2.2771E-03  2.6445E-04  1.9046E-05 -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                          2.8800E-06  3.2341E-08

テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.14
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  51.80
バックフォーカス    1.24
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 1]
"Example 1"
Surface number: teleconverter lenses s1 to s27, main lenses s28 to s41
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 34.297 1.50 1.48749 70.4
4 -14.170 0.60
5 ∞ 5.88 1.84666 23.8
6 ∞ 0.83
7 -7.704 0.40 1.76182 26.6
8 4.453 0.01 1.51400 42.8
9 4.453 1.30 1.72916 54.7
10 -34.445 0.85
11 (Aperture) ∞ 0.00
12 3.827 2.50 1.59270 35.4
13 -5.615 0.01 1.51400 42.8
14 -5.615 0.55 1.59349 67.0
15 3.186 0.74
16 * 2.316 1.62 1.63469 23.9
17 * 1.903 4.36
18 * 5.240 2.12 1.54470 56.2
19 * 28.020 7.80
20 * -17.997 2.40 1.54470 56.2
21 * -5.372 0.15
22 ∞ 7.26 1.84666 23.8
23 ∞ 0.15
24 * 3.347 1.77 1.54470 56.2
25 * 10.896 0.62
26 ∞ 0.79 1.84666 23.8
27 ∞ 0.64
28 ∞ 0.79 1.51633 64.1
29 ∞ 1.04
30 1.676 0.63 1.54470 56.2
31 -13.857 0.05
32 4.012 0.28 1.63469 23.9
33 1.559 0.57
34 -36.876 0.31 1.63469 23.9
35 -35.075 0.42
36 -6.434 0.86 1.54470 56.2
37 -0.965 0.23
38 -2.637 0.45 1.53048 55.7
39 1.582 0.64
40 ∞ 0.30 1.51633 64.1
41 ∞ 0.39
image

Aspheric coefficient teleconverter lens
16th surface 17th surface 18th surface 19th surface
K 0.000 0.000 0.000 0.000
A4 -9.6904E-03 -1.7988E-02 -2.3608E-03 -1.8572E-03
A6 -8.8622E-04 -2.7015E-03 -2.2123E-04 -2.3530E-04
A8 -6.3446E-05 4.0452E-04 2.7228E-05 2.7768E-05
A10 -7.8616E-05 -5.8518E-04 -1.1477E-06 -1.0202E-06
A12

20th surface 21st surface 24th surface 25th surface
K 0.000 0.000 0.000 0.000
A4 8.4893E-03 5.7022E-03 -1.6021E-03 -2.6228E-03
A6 -2.2246E-04 -2.0831E-04 -7.8683E-04 -2.0884E-04
A8 -3.9324E-05 -1.0432E-05 1.6795E-04 8.8478E-05
A10 2.9115E-06 1.1320E-06 -2.2052E-05 -8.0500E-06
A12 -6.1635E-08 -2.5608E-08 1.1508E-06 7.2281E-07

Main lens 30th surface 31st surface 32nd surface 33rd surface 34th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04

35th 36th 37th 38th 38th
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08

Value focal length in the combined optical system of teleconverter lens and main lens 15.14
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 51.80
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point.
Converter magnification 3.50
　図３は実施例１の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。ここで、収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズ（焦点距離４．３３ｍｍ）と組み合わされている。球面収差図において、点線はｇ線、実線はｄ線に対する球面収差量をそれぞれ表す。また、非点収差図において、実線Ｓはサジタル面、点線Ｍはメリディオナル面をそれぞれ表す（以下同じ）。 FIG. 3 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism (b), distortion (c)). Here, the aberration diagram is a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens (focal length 4.33 mm) having the aberration characteristics shown in FIG. In the spherical aberration diagram, the dotted line represents the amount of spherical aberration with respect to the g line, and the solid line represents the amount of spherical aberration with respect to the d line. In the astigmatism diagram, the solid line S represents the sagittal plane, and the dotted line M represents the meridional plane (the same applies hereinafter).
　本実施例では、第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピント位置が変化するのであれば、それ以外のレンズ群の移動であっても良い。又、実施例１のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第７レンズＬ７の主レンズ側面より主レンズ側に、６．２１ｍｍの位置である（近軸値）。 In this embodiment, any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) is moved in the direction of the optical axis in an infinite manner. Focusing from a distance to a finite distance can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved. In the teleconverter lens of Example 1, the magnification is 3.50, and the primary image formation point position is 6.21 mm from the side of the main lens side of the seventh lens L7 to the main lens side (paraxial). value).
（実施例２）
　実施例２のレンズデータを表２に示す。図４は、実施例２の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４と負の屈折力を有する第５レンズＬ５と正の屈折力を有する第６レンズ群とからなる正レンズ群ＧＲ２（＋）と、第７レンズＬ７と、第８レンズＬ８と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８は接合レンズの接着剤を表す。 (Example 2)
Table 2 shows lens data of Example 2. FIG. 4 is a sectional view of the image pickup optical system according to the second embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A positive lens group GR2 (+) including a fourth lens L4 having power, a fifth lens L5 having negative refractive power, and a sixth lens group having positive refractive power, a seventh lens L7, and an eighth lens L8, 9th lens L9, 2nd prism PS2 which is a reflective optical element, and 10th lens L10 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface number 8 represents an adhesive for the cemented lens.
［表２］
"実施例2"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 14.687  1.77    1.49746     63.7 
4                -20.720  0.20        
5                 ∞      6.27    1.84666     23.8 
6                 ∞      1.22
7                -5.653   0.45    1.80406     25.7 
8                 3.716   0.01    1.51400     42.8 
9                 3.716   0.82    1.72869     49.1 
10               666.102  1.13        
11(絞り)          ∞      0.31        
12                54.195  1.37    1.66906     29.4 
13                -3.877  0.50        
14                -3.147  0.45    1.58477     43.4 
15                -5.984  0.20        
16                8.102   1.26    1.61474     34.1 
17                44.525  0.28        
18  *             3.429   1.62    1.54470     56.2 
19  *             1.805   8.35        
20  *             4.688   1.82    1.54470     56.2 
21  *             4.821   3.46        
22  *             99.900  2.38    1.54470     56.2 
23  *             -4.598  0.32        
24                ∞      7.05    1.84666     23.8 
25                ∞      0.15        
26  *             3.818   1.64    1.54470     56.2 
27  *             11.671  0.58        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38               -6.434   0.86    1.54470     56.2 
39               -0.965   0.23        
40               -2.637   0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.40
像

非球面係数
テレコンバータレンズ
    第18面         第19面       第20面       第21面
K   0.000          0.000         0.007        -0.063 
A4  -2.3010E-03   -1.8478E-02   -5.8459E-03   -9.7661E-03
A6  5.9234E-04    -3.1207E-03   -1.8169E-04   -4.8445E-05
A8  6.2984E-06     1.7767E-03    1.8034E-05    1.3636E-05
A10 -3.4502E-07   -7.9259E-04   -5.1572E-07   -3.4036E-07
A12                              7.0506E-09   -6.1470E-09
A14                             -2.8234E-10    2.4373E-10

    第22面       第23面        第26面       第27面
K   -0.988       -0.031         0.000        0.000 
A4  1.0099E-02    9.1745E-03    3.4615E-03   -9.8086E-04
A6  -6.3276E-04   -3.0342E-05  -9.7322E-05   1.1246E-03
A8  7.7607E-06    -9.9401E-06   1.2752E-04   9.0844E-05
A10 7.0330E-07    -4.8446E-07  -1.8294E-05  -7.2273E-05
A12 -5.0633E-08   3.8977E-08    5.4012E-07   6.4900E-06
A14 1.1473E-09   -2.1578E-10     


主レンズ                    
    第32面      第33面     第34面       第35面      第36面
K   -0.025      -29.823     -30.000      -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02  4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02  1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02 -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02 -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02  7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03              -1.8876E-02   2.2070E-02  -6.3386E-04

    第37面       第38面      第39面       第40面      第41面
K   30.000        7.826       -4.059       -30.000     -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02 -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03  7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03 -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04  1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                             2.8800E-06  3.2341E-08

テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.16
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  51.98
バックフォーカス    1.24
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 2]
"Example 2"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 14.687 1.77 1.49746 63.7
4 -20.720 0.20
5 ∞ 6.27 1.84666 23.8
6 ∞ 1.22
7 -5.653 0.45 1.80406 25.7
8 3.716 0.01 1.51400 42.8
9 3.716 0.82 1.72869 49.1
10 666.102 1.13
11 (Aperture) ∞ 0.31
12 54.195 1.37 1.66906 29.4
13 -3.877 0.50
14 -3.147 0.45 1.58477 43.4
15 -5.984 0.20
16 8.102 1.26 1.61474 34.1
17 44.525 0.28
18 * 3.429 1.62 1.54470 56.2
19 * 1.805 8.35
20 * 4.688 1.82 1.54470 56.2
21 * 4.821 3.46
22 * 99.900 2.38 1.54470 56.2
23 * -4.598 0.32
24 ∞ 7.05 1.84666 23.8
25 ∞ 0.15
26 * 3.818 1.64 1.54470 56.2
27 * 11.671 0.58
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.40
image

Aspherical coefficient teleconverter lens 18th surface 19th surface 20th surface 21st surface
K 0.000 0.000 0.007 -0.063
A4 -2.3010E-03 -1.8478E-02 -5.8459E-03 -9.7661E-03
A6 5.9234E-04 -3.1207E-03 -1.8169E-04 -4.8445E-05
A8 6.2984E-06 1.7767E-03 1.8034E-05 1.3636E-05
A10 -3.4502E-07 -7.9259E-04 -5.1572E-07 -3.4036E-07
A12 7.0506E-09 -6.1470E-09
A14 -2.8234E-10 2.4373E-10

22nd surface 23rd surface 26th surface 27th surface
K -0.988 -0.031 0.000 0.000
A4 1.0099E-02 9.1745E-03 3.4615E-03 -9.8086E-04
A6 -6.3276E-04 -3.0342E-05 -9.7322E-05 1.1246E-03
A8 7.7607E-06 -9.9401E-06 1.2752E-04 9.0844E-05
A10 7.0330E-07 -4.8446E-07 -1.8294E-05 -7.2273E-05
A12 -5.0633E-08 3.8977E-08 5.4012E-07 6.4900E-06
A14 1.1473E-09 -2.1578E-10


Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04

37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08

Value focal length in the combined optical system of teleconverter lens and main lens 15.16
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 51.98
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point.
Converter magnification 3.50
　図５は実施例２の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 5 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピント位置が変化するのであれば、それ以外のレンズ群の移動であっても良い。又、実施例２のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、１．５６ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved. In the teleconverter lens of Example 2, the magnification is 3.50, and the primary imaging point position is 1.56 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
（実施例３）
　実施例３のレンズデータを表３に示す。図６は、実施例３の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、第６レンズＬ６と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 3)
Table 3 shows lens data of Example 3. FIG. 6 is a sectional view of the image pickup optical system according to the third embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6 A seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, a second prism PS2 that is a reflective optical element, and a tenth lens L10. (P1 Consisting of lens) and. ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
　尚、本実施例のテレコンバータレンズＣＬは、図７に示すように、２つのプリズムＰＳ１、ＰＳ２を用いて光軸２回折り曲げ構造としているが、第２プリズムＰＳ２のみを用いて光軸１回折り曲げとしても良い。折り曲げは、撮像素子の短辺側に行うのが好ましい。 As shown in FIG. 7, the teleconverter lens CL of the present embodiment has a two-axis bending structure using two prisms PS1 and PS2. However, the teleconverter lens CL has one optical axis only using the second prism PS2. It may be bent. The bending is preferably performed on the short side of the image sensor.
［表３］
"実施例3"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 13.736  1.76    1.48749     70.4 
4               -19.457   0.50        
5                 ∞      6.31    1.84666     23.8 
6                 ∞      1.12        
7                -7.046   0.45    1.80518     25.5 
8                 7.838   0.01    1.51400     42.8 
9                 7.838   0.80    1.74330     49.2 
10              -51.429   1.39        
11(絞り)          ∞      1.57        
12                7.869   1.13    1.67270     32.2 
13                -8.673  0.01    1.51400     42.8 
14                -8.673  0.57    1.59349     67.0 
15               -31.068  0.44        
16  *             4.037   2.50    1.54470     56.2 
17  *             1.841   2.11        
18  *             -3.397  2.19    1.54470     56.2 
19  *             -3.972  1.32        
20  *             5.125   2.08    1.54470     56.2 
21  *             6.345   5.69        
22  *             58.840  2.75    1.54470     56.2 
23  *             -5.253  0.15        
24                ∞      7.39    1.84666     23.8 
25                ∞      0.15        
26  *             4.313   1.73    1.54470     56.2 
27  *             15.860  0.45        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.40
像


非球面係数
テレコンバータレンズ
    第16面         第17面      第18面       第19面      第20面
K   0.000          0.000        0.000        0.000        0.000 
A4  -1.4449E-03   -1.0385E-02   8.0744E-03   3.3351E-03  -2.3021E-03
A6  -3.1398E-04   -6.1921E-03  -2.0944E-03  -2.2087E-04  -3.2835E-04
A8  7.1013E-05     1.5027E-03   5.0287E-04  -4.4095E-05   2.6168E-05
A10 -8.9394E-06   -6.7038E-04  -1.6237E-04   7.8367E-06  -6.6391E-07
A12                             2.0758E-05  -4.3735E-07 


    第21面        第22面      第23面       第26面       第27面
K   0.000         0.000        0.000        0.000        0.000 
A4  -5.8301E-03   6.8227E-03   6.6970E-03   1.0540E-03  -3.2706E-03
A6  -9.4465E-05  -3.1482E-04  -2.0734E-04  -5.3395E-04  -8.1995E-05
A8  1.5408E-05   -1.1813E-05  -8.6775E-06   8.4220E-05   1.4145E-04
A10 -3.9026E-07   1.2891E-06   1.0659E-06  -5.4896E-06  -1.4720E-05
A12              -2.8022E-08  -2.3267E-08   2.8702E-07   6.4109E-07


主レンズ                    
    第32面      第33面      第34面       第35面      第36面
K   -0.025      -29.823      -30.000      -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02  1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02  6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03  2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03 -1.8554E-02
A14 8.4210E-03               -1.8876E-02   2.2070E-02 -6.3386E-04


    第37面       第38面      第39面       第40面       第41面
K   30.000        7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02 -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03  7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03 -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04  1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05 -5.0337E-06
A14 -2.7944E-03                            2.8800E-06  3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.16
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  52.96
バックフォーカス    1.25
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 3]
"Example 3"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 13.736 1.76 1.48749 70.4
4 -19.457 0.50
5 ∞ 6.31 1.84666 23.8
6 ∞ 1.12
7 -7.046 0.45 1.80518 25.5
8 7.838 0.01 1.51400 42.8
9 7.838 0.80 1.74330 49.2
10 -51.429 1.39
11 (Aperture) ∞ 1.57
12 7.869 1.13 1.67270 32.2
13 -8.673 0.01 1.51400 42.8
14 -8.673 0.57 1.59349 67.0
15 -31.068 0.44
16 * 4.037 2.50 1.54470 56.2
17 * 1.841 2.11
18 * -3.397 2.19 1.54470 56.2
19 * -3.972 1.32
20 * 5.125 2.08 1.54470 56.2
21 * 6.345 5.69
22 * 58.840 2.75 1.54470 56.2
23 * -5.253 0.15
24 ∞ 7.39 1.84666 23.8
25 ∞ 0.15
26 * 4.313 1.73 1.54470 56.2
27 * 15.860 0.45
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.40
image


Aspheric coefficient teleconverter lens 16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.4449E-03 -1.0385E-02 8.0744E-03 3.3351E-03 -2.3021E-03
A6 -3.1398E-04 -6.1921E-03 -2.0944E-03 -2.2087E-04 -3.2835E-04
A8 7.1013E-05 1.5027E-03 5.0287E-04 -4.4095E-05 2.6168E-05
A10 -8.9394E-06 -6.7038E-04 -1.6237E-04 7.8367E-06 -6.6391E-07
A12 2.0758E-05 -4.3735E-07


21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -5.8301E-03 6.8227E-03 6.6970E-03 1.0540E-03 -3.2706E-03
A6 -9.4465E-05 -3.1482E-04 -2.0734E-04 -5.3395E-04 -8.1995E-05
A8 1.5408E-05 -1.1813E-05 -8.6775E-06 8.4220E-05 1.4145E-04
A10 -3.9026E-07 1.2891E-06 1.0659E-06 -5.4896E-06 -1.4720E-05
A12 -2.8022E-08 -2.3267E-08 2.8702E-07 6.4109E-07


Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04


37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.16
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 52.96
Back focus 1.25
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point. The focal length of the main lens is 4.33 mm.
Converter magnification 3.50
　図８は実施例３の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 8 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピント位置が変化するのであれば、それ以外のレンズ群の移動であっても良い。又、実施例３のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、３．６７ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus position changes due to the lens movement, the other lens group may be moved. In the teleconverter lens of Example 3, the magnification is 3.50, and the primary imaging point position is a position of 3.67 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
（実施例４）
　実施例４のレンズデータを表４に示す。図９は、実施例４の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、第６レンズＬ６と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 4)
Table 4 shows lens data of Example 4. FIG. 9 is a sectional view of the image pickup optical system according to the fourth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6 A seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, a second prism PS2 that is a reflective optical element, and a tenth lens L10. (P1 Consisting of lens) and. ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表４］
"実施例4" 
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 13.684  1.75    1.49866     79.8 
4               -19.742   0.50        
5                 ∞      6.27    1.84666     23.8 
6                 ∞      1.10        
7                 -7.103  0.45    1.80481     27.6 
8                 7.500   0.01    1.51400     42.8 
9                 7.500   0.80    1.73745     48.5 
10              -50.730   1.33        
11(絞り)          ∞      1.73        
12               11.121   0.95    1.67576     30.9 
13                -6.198  0.01    1.51400     42.8 
14                -6.198  0.45    1.58661     40.5 
15              -42.055   0.31        
16  *             3.342   2.50    1.54470     56.2 
17  *             1.836   2.28        
18  *             -3.130  2.00    1.54470     56.2 
19  *             -3.615  1.60        
20  *             5.170   1.94    1.54470     56.2 
21  *             6.046   5.89        
22  *             73.897  2.80    1.54470     56.2 
23  *             -5.174  0.15        
24                ∞      7.38    1.84666     23.8 
25                ∞      0.15        
26  *             4.378   1.75    1.54470     56.2 
27  *             16.212  0.46        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.40
像


非球面係数
テレコンバータレンズ
    第16面        第17面      第18面       第19面       第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -1.1056E-03  -8.7165E-03   5.9201E-03   3.6704E-03  -1.7357E-03
A6  -2.7769E-04  -5.2331E-03  -1.8337E-03  -2.3857E-04  -3.5000E-04
A8  7.3826E-05    1.6030E-03   5.0639E-04  -4.0621E-05   2.6197E-05
A10 -1.1988E-05  -6.9623E-04  -1.6642E-04   8.7773E-06  -6.4936E-07
A12                            2.4562E-05  -4.7529E-07 
A14


    第21面        第22面      第23面       第26面      第27面
K   0.000         0.000        0.000        0.000        0.000 
A4  -5.7156E-03   7.2647E-03   6.8747E-03   1.3251E-03  -3.1631E-03
A6  -9.4529E-05  -3.7223E-04  -2.2881E-04  -5.4148E-04  -7.3723E-05
A8  1.5014E-05   -9.0787E-06  -7.7676E-06   8.5643E-05   1.4186E-04
A10 -3.8899E-07   1.2585E-06   1.0876E-06  -5.2521E-06  -1.4400E-05
A12              -2.8162E-08  -2.3868E-08   2.5602E-07   5.7776E-07


主レンズ
    第32面      第33面      第34面       第35面       第36面
K   -0.025      -29.823      -30.000       -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03               -1.8876E-02   2.2070E-02  -6.3386E-04


    第37面      第38面       第39面       第40面       第41面
K   30.000        7.826       -4.059       -30.000     -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02 -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03  7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02  2.1085E-03  -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04 -1.9864E-04   1.4444E-04
A12 -2.2771E-03   2.6445E-04  1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                             2.8800E-06 3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.16
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  52.97
バックフォーカス    1.2
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 4]
"Example 4"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 13.684 1.75 1.49866 79.8
4 -19.742 0.50
5 ∞ 6.27 1.84666 23.8
6 ∞ 1.10
7 -7.103 0.45 1.80481 27.6
8 7.500 0.01 1.51400 42.8
9 7.500 0.80 1.73745 48.5
10 -50.730 1.33
11 (Aperture) ∞ 1.73
12 11.121 0.95 1.67576 30.9
13 -6.198 0.01 1.51400 42.8
14 -6.198 0.45 1.58661 40.5
15 -42.055 0.31
16 * 3.342 2.50 1.54470 56.2
17 * 1.836 2.28
18 * -3.130 2.00 1.54470 56.2
19 * -3.615 1.60
20 * 5.170 1.94 1.54470 56.2
21 * 6.046 5.89
22 * 73.897 2.80 1.54470 56.2
23 * -5.174 0.15
24 ∞ 7.38 1.84666 23.8
25 ∞ 0.15
26 * 4.378 1.75 1.54470 56.2
27 * 16.212 0.46
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.40
image


Aspheric coefficient teleconverter lens 16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.1056E-03 -8.7165E-03 5.9201E-03 3.6704E-03 -1.7357E-03
A6 -2.7769E-04 -5.2331E-03 -1.8337E-03 -2.3857E-04 -3.5000E-04
A8 7.3826E-05 1.6030E-03 5.0639E-04 -4.0621E-05 2.6197E-05
A10 -1.1988E-05 -6.9623E-04 -1.6642E-04 8.7773E-06 -6.4936E-07
A12 2.4562E-05 -4.7529E-07
A14


21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -5.7156E-03 7.2647E-03 6.8747E-03 1.3251E-03 -3.1631E-03
A6 -9.4529E-05 -3.7223E-04 -2.2881E-04 -5.4148E-04 -7.3723E-05
A8 1.5014E-05 -9.0787E-06 -7.7676E-06 8.5643E-05 1.4186E-04
A10 -3.8899E-07 1.2585E-06 1.0876E-06 -5.2521E-06 -1.4400E-05
A12 -2.8162E-08 -2.3868E-08 2.5602E-07 5.7776E-07


Main lens 32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04


37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.16
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 52.97
Back focus 1.2
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point.
Converter magnification 3.50
　図１０は実施例４の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 10 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例４のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、３．８７ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 4, the magnification is 3.50, and the primary image formation point position is 3.87 mm from the side of the main lens side of the eighth lens L8 to the main lens side (paraxial). value).
（実施例５）
　実施例５のレンズデータを表５に示す。図１１は、実施例５の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、負の屈折力を有する第６レンズＬ６（Ｎ３レンズ）と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 5)
Table 5 shows lens data of Example 5. FIG. 11 is a sectional view of the image pickup optical system according to the fifth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power; A sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element. Second prism P 2, consisting of a tenth lens L10 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表５］
"実施例5" 
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 13.411  1.66    1.49866     79.8 
4               -21.275   0.50        
5                 ∞      6.22    1.84666     23.8 
6                 ∞      1.09        
7                 -7.553  0.45    1.80481     27.6 
8                 7.401   0.01    1.51400     42.8 
9                 7.401   0.80    1.73745     48.5 
10              -49.976   1.26        
11(絞り)          ∞      2.46        
12                13.585  1.05    1.67790     36.0 
13                -5.687  0.01    1.51400     42.8 
14                -5.687  0.45    1.57474     42.9 
15              -30.469   0.20        
16  *             3.208   2.50    1.54470     56.2 
17  *             1.969   2.65        
18  *             -2.353  2.00    1.54470     56.2 
19  *             -3.436  1.27        
20  *             5.374   2.00    1.54470     56.2 
21  *             7.033   6.37        
22  *             76.684  2.95    1.54470     56.2 
23  *             -5.351  0.15        
24                 ∞     7.54    1.84666     23.8 
25                 ∞     0.15        
26  *             5.169   1.84    1.54470     56.2 
27  *             30.627  0.41        
28                 ∞     0.79    1.84666     23.8 
29                 ∞     0.64        
30                 ∞     0.79    1.51633     64.1 
31                 ∞     1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.40        
像                  


非球面係数                  
テレコンバータレンズ                    
    第16面       第17面       第18面      第19面       第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -6.3841E-04  -4.3047E-03   5.3586E-03   1.7376E-03  -2.1815E-03
A6  -1.9094E-04  -3.2562E-03  -1.1374E-03   9.0041E-05  -2.4389E-04
A8  4.6352E-05    1.1299E-03   5.0373E-04  -5.8233E-05   2.2856E-05
A10 -6.0260E-06  -3.0952E-04  -1.8082E-04   9.3925E-06  -7.1920E-07
A12                            3.7729E-05  -3.0429E-07 -1.1332E-10
A14                                                     1.6928E-10


    第21面       第22面      第23面       第26面       第27面
K   0.000        0.000        0.000        0.000        0.000 
A4  -4.8438E-03  6.7021E-03   6.5987E-03   1.8079E-03  -2.2007E-03
A6  -6.6876E-05 -2.5291E-04  -2.1271E-04  -5.4315E-04  -7.6874E-05
A8  1.4033E-05  -1.4202E-05  -6.6332E-06   9.1081E-05   1.3801E-04
A10 -4.4517E-07  1.3317E-06   9.8039E-07  -4.8070E-06  -1.4567E-05
A12 -1.5329E-09 -2.9441E-08  -2.3681E-08   1.5396E-07   5.3927E-07
A14 1.4417E-10   6.6262E-11   6.7167E-11


主レンズ
    第32面       第33面      第34面      第35面      第36面
K   -0.025       -29.823     -30.000       -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03              -1.8876E-02   2.2070E-02  -6.3386E-04


    第37面       第38面      第39面       第40面       第41面
K   30.000        7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02 -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03  7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03 -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04  1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05 -5.0337E-06
A14 -2.7944E-03                            2.8800E-06  3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.16
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  54.38
バックフォーカス    1.24
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 5]
"Example 5"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 13.411 1.66 1.49866 79.8
4 -21.275 0.50
5 ∞ 6.22 1.84666 23.8
6 ∞ 1.09
7 -7.553 0.45 1.80481 27.6
8 7.401 0.01 1.51400 42.8
9 7.401 0.80 1.73745 48.5
10 -49.976 1.26
11 (Aperture) ∞ 2.46
12 13.585 1.05 1.67790 36.0
13 -5.687 0.01 1.51400 42.8
14 -5.687 0.45 1.57474 42.9
15 -30.469 0.20
16 * 3.208 2.50 1.54470 56.2
17 * 1.969 2.65
18 * -2.353 2.00 1.54470 56.2
19 * -3.436 1.27
20 * 5.374 2.00 1.54470 56.2
21 * 7.033 6.37
22 * 76.684 2.95 1.54470 56.2
23 * -5.351 0.15
24 ∞ 7.54 1.84666 23.8
25 ∞ 0.15
26 * 5.169 1.84 1.54470 56.2
27 * 30.627 0.41
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.40
image


Aspheric coefficient
Teleconverter lens
16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -6.3841E-04 -4.3047E-03 5.3586E-03 1.7376E-03 -2.1815E-03
A6 -1.9094E-04 -3.2562E-03 -1.1374E-03 9.0041E-05 -2.4389E-04
A8 4.6352E-05 1.1299E-03 5.0373E-04 -5.8233E-05 2.2856E-05
A10 -6.0260E-06 -3.0952E-04 -1.8082E-04 9.3925E-06 -7.1920E-07
A12 3.7729E-05 -3.0429E-07 -1.1332E-10
A14 1.6928E-10


21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -4.8438E-03 6.7021E-03 6.5987E-03 1.8079E-03 -2.2007E-03
A6 -6.6876E-05 -2.5291E-04 -2.1271E-04 -5.4315E-04 -7.6874E-05
A8 1.4033E-05 -1.4202E-05 -6.6332E-06 9.1081E-05 1.3801E-04
A10 -4.4517E-07 1.3317E-06 9.8039E-07 -4.8070E-06 -1.4567E-05
A12 -1.5329E-09 -2.9441E-08 -2.3681E-08 1.5396E-07 5.3927E-07
A14 1.4417E-10 6.6262E-11 6.7167E-11


Main lens 32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04


37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.16
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 54.38
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point. The focal length of the main lens is 4.33 mm.
Converter magnification 3.50
　図１２は実施例５の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 12 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例５のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、４．２４ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 5, the magnification is 3.50, and the primary imaging point position is 4.24 mm from the main lens side surface of the eighth lens L8 to the main lens side (paraxial). value).
（実施例６）
　実施例６のレンズデータを表６に示す。図１３は、実施例６の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、負の屈折力を有する第６レンズＬ６（Ｎ３レンズ）と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 6)
Table 6 shows lens data of Example 6. FIG. 13 is a sectional view of the image pickup optical system according to the sixth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power; A sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element. Second prism P 2, consisting of a tenth lens L10 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表６］
"実施例6"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 12.039  2.04    1.48749     70.4 
4               -23.728   0.59        
5                 ∞      6.93    1.84666     23.8 
6                 ∞      1.10        
7                 -9.466  0.45    1.80518     25.5 
8                 7.770   0.01    1.51400     42.8 
9                 7.770   2.45    1.74330     49.2 
10                52.668  0.20        
11(絞り)          ∞      2.60        
12                8.494   1.34    1.67270     32.2 
13                -7.619  0.01    1.51400     42.8 
14                -7.619  0.50    1.59349     67.0 
15              -270.235  0.37        
16  *             3.603   2.43    1.54470     56.2 
17  *             1.868   2.12        
18  *             -4.339  2.50    1.54470     56.2 
19  *             -6.091  3.73        
20  *             5.165   1.75    1.54470     56.2 
21  *             5.293   6.08        
22  *             79.632  3.00    1.54470     56.2 
23  *             -5.417  0.15        
24                ∞      7.59    1.84666     23.8 
25                ∞      0.15        
26  *             6.481   1.88    1.54470     56.2 
27  *           -55.926   0.31        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.39
像 


非球面係数 
テレコンバータレンズ 
    第16面       第17面       第18面      第19面       第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -1.5249E-03  -9.6421E-03   6.2843E-03   3.2004E-03  -2.4400E-03
A6  -2.8370E-04  -5.8715E-03  -2.3239E-03  -3.4567E-04  -3.3971E-04
A8  3.1737E-05    1.0693E-03   4.3813E-04  -2.7674E-05   2.5667E-05
A10 -3.3428E-06  -5.1908E-04  -1.3900E-04   8.1972E-06  -6.1503E-07
A12                            2.1820E-05  -3.3340E-07 
A14                 

    第21面       第22面     第23面      第26面      第27面
K   0.000        0.000       0.000       0.000        0.000 
A4  -7.0084E-03  7.1680E-03  6.4631E-03  1.0664E-03  -2.5122E-03
A6  -8.0093E-05 -3.0692E-04 -2.0082E-04 -5.1222E-04  -1.4760E-04
A8  1.5617E-05  -1.1719E-05 -8.1959E-06  8.2855E-05   1.3270E-04
A10 -4.3428E-07  1.2922E-06  1.0555E-06  -5.5643E-06 -1.4948E-05
A12             -2.8342E-08  -2.4023E-08  2.6835E-07  8.1793E-07
A14

主レンズ                    
    第32面      第33面      第34面       第35面       第36面
K   -0.025      -29.823      -30.000      -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03               -1.8876E-02    2.2070E-02 -6.3386E-04


    第37面      第38面      第39面       第40面       第41面
K   30.000       7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01 -3.7724E-04  -4.3185E-02  -1.4223E-02  -3.6784E-02
A6  3.0627E-03   2.0421E-02   5.1578E-02  -1.5539E-03   7.2592E-03
A8  1.9106E-02  -1.1047E-03  -1.1842E-02   2.1085E-03  -1.4441E-03
A10 1.6054E-02  -1.6207E-03   6.5318E-04  -1.9864E-04   1.4444E-04
A12 -2.2771E-03  2.6445E-04   1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                           2.8800E-06   3.2341E-08

テレコンバータレンズと主レンズの合成光学系における値
焦点距離    21.68 
Fナンバー   4.50 
半画角      7.8 
像高        3.02 
レンズ全長  58.67 
バックフォーカス    1.24 
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      5.01
[Table 6]
"Example 6"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 12.039 2.04 1.48749 70.4
4 -23.728 0.59
5 ∞ 6.93 1.84666 23.8
6 ∞ 1.10
7 -9.466 0.45 1.80518 25.5
8 7.770 0.01 1.51400 42.8
9 7.770 2.45 1.74330 49.2
10 52.668 0.20
11 (Aperture) ∞ 2.60
12 8.494 1.34 1.67270 32.2
13 -7.619 0.01 1.51400 42.8
14 -7.619 0.50 1.59349 67.0
15 -270.235 0.37
16 * 3.603 2.43 1.54470 56.2
17 * 1.868 2.12
18 * -4.339 2.50 1.54470 56.2
19 * -6.091 3.73
20 * 5.165 1.75 1.54470 56.2
21 * 5.293 6.08
22 * 79.632 3.00 1.54470 56.2
23 * -5.417 0.15
24 ∞ 7.59 1.84666 23.8
25 ∞ 0.15
26 * 6.481 1.88 1.54470 56.2
27 * -55.926 0.31
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.39
image


Aspheric coefficient
Teleconverter lens
16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.5249E-03 -9.6421E-03 6.2843E-03 3.2004E-03 -2.4400E-03
A6 -2.8370E-04 -5.8715E-03 -2.3239E-03 -3.4567E-04 -3.3971E-04
A8 3.1737E-05 1.0693E-03 4.3813E-04 -2.7674E-05 2.5667E-05
A10 -3.3428E-06 -5.1908E-04 -1.3900E-04 8.1972E-06 -6.1503E-07
A12 2.1820E-05 -3.3340E-07
A14

21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -7.0084E-03 7.1680E-03 6.4631E-03 1.0664E-03 -2.5122E-03
A6 -8.0093E-05 -3.0692E-04 -2.0082E-04 -5.1222E-04 -1.4760E-04
A8 1.5617E-05 -1.1719E-05 -8.1959E-06 8.2855E-05 1.3270E-04
A10 -4.3428E-07 1.2922E-06 1.0555E-06 -5.5643E-06 -1.4948E-05
A12 -2.8342E-08 -2.4023E-08 2.6835E-07 8.1793E-07
A14

Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04


37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08

Value focal length in the combined optical system of teleconverter lens and main lens 21.68
F number 4.50
Half angle of view 7.8
Statue height 3.02
Total lens length 58.67
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point.
Converter magnification 5.01
　図１４は実施例６の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 14 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例６のテレコンバータレンズでは、倍率が５．０１であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、４．２１ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 6, the magnification is 5.01, and the primary imaging point position is 4.21 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
（実施例７）
　実施例７のレンズデータを表７に示す。図１５は、実施例７の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、第６レンズＬ６と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 7)
Table 7 shows lens data of Example 7. FIG. 15 is a sectional view of the image pickup optical system according to the seventh embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens in which a fourth lens L4 having power (P4 lens) and a fifth lens L5 having negative refractive power (N2 lens) are cemented, and a sixth lens L6 A seventh lens L7 that is a meniscus lens having a concave surface facing the subject, an eighth lens L8, a ninth lens L9, a second prism PS2 that is a reflective optical element, and a tenth lens L10 (P1 lens) And from That. ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表７］
"実施例7"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 59.836  3.00    1.48749     70.4 
4               -15.256   1.28        
5                 ∞      6.85    1.84666     23.8 
6                 ∞      1.83        
7                 -4.929  0.90    1.80518     25.5 
8                 6.707   0.01    1.51400     42.8 
9                 6.707   3.55    1.74330     49.2 
10                -8.478  0.23        
11(絞り)          ∞      1.07        
12                8.581   1.82    1.67270     32.2 
13              -14.982   0.01    1.51400     42.8 
14              -14.982   0.86    1.59349     67.0 
15                66.822  0.52        
16  *             3.372   2.50    1.54470     56.2 
17  *             1.739   2.21        
18  *             -2.669  1.59    1.54470     56.2 
19  *             -2.964  1.37        
20  *             4.189   2.20    1.54470     56.2 
21  *             3.919   4.79        
22  *             47.390  2.62    1.54470     56.2 
23  *             -4.482  0.15        
24                ∞      6.00    1.84666     23.8 
25                ∞      0.15        
26  *             3.255   2.16    1.54470     56.2 
27  *             10.353  0.47        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.41 
像 


非球面係数 
テレコンバータレンズ 
    第16面       第17面       第18面       第19面      第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -1.1328E-03  -1.3830E-02   6.3835E-03   5.8560E-03  -3.4177E-03
A6  -9.4111E-05  -3.7406E-03  -2.0740E-03  -5.3311E-04  -2.2098E-04
A8  6.2090E-06   -9.1067E-05  -1.5417E-04  -4.2501E-05   2.8267E-05
A10 -1.1092E-06  -5.2052E-04  -1.1298E-04   6.8219E-06  -1.1212E-06
A12                            2.1432E-05   1.1338E-07  


    第21面       第22面      第23面      第26面       第27面
K   0.000         0.000       0.000        0.000        0.000 
A4  -1.0254E-02   6.0556E-03  6.5792E-03   2.0848E-03  -2.6274E-03
A6  2.4072E-04   -2.7782E-04  5.5676E-06  -6.5921E-04  -2.4253E-04
A8  4.3763E-06   -1.0161E-05 -1.9169E-05   5.1500E-05   1.0595E-04
A10 -7.2363E-07  1.4508E-06   1.5387E-06  -7.1393E-06  -1.6887E-05
A12              -3.5533E-08 -2.4671E-08   1.5943E-07   1.2916E-06

主レンズ                    
    第32面       第33面     第34面       第35面       第36面
K   -0.025       -29.823     -30.000      -6.295        30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02 -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02 -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02  6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03  2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03              -1.8876E-02   2.2070E-02  -6.3386E-04

    第37面       第38面      第39面       第40面       第41面
K   30.000        7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02 -1.4223E-02  -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02 -1.5539E-03   7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02  2.1085E-03  -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04 -1.9864E-04   1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05 -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                            2.8800E-06  3.2341E-08

テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.18
Fナンバー   4.50
半画角      11.1 
像高        3.02 
レンズ全長  56.53
バックフォーカス    1.25
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.51
[Table 7]
"Example 7"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 59.836 3.00 1.48749 70.4
4 -15.256 1.28
5 ∞ 6.85 1.84666 23.8
6 ∞ 1.83
7 -4.929 0.90 1.80518 25.5
8 6.707 0.01 1.51400 42.8
9 6.707 3.55 1.74330 49.2
10 -8.478 0.23
11 (Aperture) ∞ 1.07
12 8.581 1.82 1.67270 32.2
13 -14.982 0.01 1.51400 42.8
14 -14.982 0.86 1.59349 67.0
15 66.822 0.52
16 * 3.372 2.50 1.54470 56.2
17 * 1.739 2.21
18 * -2.669 1.59 1.54470 56.2
19 * -2.964 1.37
20 * 4.189 2.20 1.54470 56.2
21 * 3.919 4.79
22 * 47.390 2.62 1.54470 56.2
23 * -4.482 0.15
24 ∞ 6.00 1.84666 23.8
25 ∞ 0.15
26 * 3.255 2.16 1.54470 56.2
27 * 10.353 0.47
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.41
image


Aspheric coefficient
Teleconverter lens
16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.1328E-03 -1.3830E-02 6.3835E-03 5.8560E-03 -3.4177E-03
A6 -9.4111E-05 -3.7406E-03 -2.0740E-03 -5.3311E-04 -2.2098E-04
A8 6.2090E-06 -9.1067E-05 -1.5417E-04 -4.2501E-05 2.8267E-05
A10 -1.1092E-06 -5.2052E-04 -1.1298E-04 6.8219E-06 -1.1212E-06
A12 2.1432E-05 1.1338E-07


21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.0254E-02 6.0556E-03 6.5792E-03 2.0848E-03 -2.6274E-03
A6 2.4072E-04 -2.7782E-04 5.5676E-06 -6.5921E-04 -2.4253E-04
A8 4.3763E-06 -1.0161E-05 -1.9169E-05 5.1500E-05 1.0595E-04
A10 -7.2363E-07 1.4508E-06 1.5387E-06 -7.1393E-06 -1.6887E-05
A12 -3.5533E-08 -2.4671E-08 1.5943E-07 1.2916E-06

Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04

37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08

Value focal length in the combined optical system of teleconverter lens and main lens 15.18
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 56.53
Back focus 1.25
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point. The focal length of the main lens is 4.33 mm.
Converter magnification 3.51
　図１６は実施例７の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 16 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例７のテレコンバータレンズでは、倍率が３．５１であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、３．４５ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 7, the magnification is 3.51, and the primary image formation point position is 3.45 mm from the side of the main lens of the eighth lens L8 to the main lens side (paraxial). value).
（実施例８）
　実施例８のレンズデータを表８に示す。図１７は、実施例８の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、負の屈折力を有する第６レンズＬ６（Ｎ３レンズ）と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 (Example 8)
Table 8 shows lens data of Example 8. FIG. 17 is a cross-sectional view of the image pickup optical system according to the eighth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power; A sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element. Second prism P 2, consisting of a tenth lens L10 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表８］
"実施例8"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 13.551  1.25    1.48749     70.4 
4               -20.170   0.50        
5                 ∞      5.97    1.84666     23.8 
6                 ∞      0.92        
7                 -8.985  0.45    1.80518     25.5 
8                 5.920   0.01    1.51400     42.8 
9                 5.920   0.80    1.74330     49.2 
10                40.929  0.20        
11(絞り)         ∞       1.93        
12                7.506   1.03    1.67270     32.2 
13                -8.572  0.01    1.51400     42.8 
14                -8.572  0.45    1.59349     67.0 
15              -33.269   0.31        
16  *             3.865   2.49    1.54470     56.2 
17  *             1.848   2.32        
18  *             -3.070  2.07    1.54470     56.2 
19  *             -3.518  3.62        
20  *             5.204   2.20    1.54470     56.2 
21  *             5.276   6.18        
22  *             17.028  1.77    1.54470     56.2 
23  *           -43.868   0.80        
24                ∞      6.81    1.84666     23.8 
25                ∞      0.15        
26  *             3.717   2.17    1.54470     56.2 
27  *             30.270  0.66        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.42
像


非球面係数
テレコンバータレンズ
    第16面       第17面       第18面       第19面      第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -1.7478E-03  -1.0687E-02   9.4044E-03   4.4476E-03  -1.3159E-03
A6  -2.1302E-04  -4.7649E-03  -2.4656E-03  -3.1656E-04  -3.8179E-04
A8  4.8701E-05    1.2842E-03   5.9228E-04  -3.3166E-05   2.6103E-05
A10 -7.0256E-06  -6.0994E-04  -1.3386E-04   8.1014E-06  -6.0956E-07
A12                            2.0891E-05  -4.0488E-07

    第21面        第22面     第23面       第26面      第27面
K   0.000         0.000       0.000        0.000        0.000 
A4  -7.1183E-03   7.1241E-03  3.6705E-03  -3.1659E-03  -1.6287E-03
A6  -5.9631E-05  -3.3629E-04 -2.5811E-04  -3.8574E-04  -2.3319E-04
A8  1.4743E-05   -1.3205E-05 -6.1048E-06   7.7759E-05   1.3985E-04
A10 -4.2187E-07   1.2183E-06  1.0207E-06  -6.1026E-06  -1.4032E-05
A12              -2.4140E-08 -2.5103E-08   2.5229E-07   7.0687E-07

主レンズ                    
    第32面       第33面      第34面      第35面       第36面
K   -0.025       -29.823     -30.000      -6.295       30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03               -1.8876E-02   2.2070E-02  -6.3386E-04

    第37面       第38面      第39面       第40面      第41面
K   30.000        7.826       -4.059       -30.000     -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02  -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03   7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03  -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04   1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                             2.8800E-06  3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.40
Fナンバー   4.50
半画角      10.9 
像高        3.02
レンズ全長  53.49
バックフォーカス    1.26
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.56
[Table 8]
"Example 8"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 13.551 1.25 1.48749 70.4
4 -20.170 0.50
5 ∞ 5.97 1.84666 23.8
6 ∞ 0.92
7 -8.985 0.45 1.80518 25.5
8 5.920 0.01 1.51400 42.8
9 5.920 0.80 1.74330 49.2
10 40.929 0.20
11 (Aperture) ∞ 1.93
12 7.506 1.03 1.67270 32.2
13 -8.572 0.01 1.51400 42.8
14 -8.572 0.45 1.59349 67.0
15 -33.269 0.31
16 * 3.865 2.49 1.54470 56.2
17 * 1.848 2.32
18 * -3.070 2.07 1.54470 56.2
19 * -3.518 3.62
20 * 5.204 2.20 1.54470 56.2
21 * 5.276 6.18
22 * 17.028 1.77 1.54470 56.2
23 * -43.868 0.80
24 ∞ 6.81 1.84666 23.8
25 ∞ 0.15
26 * 3.717 2.17 1.54470 56.2
27 * 30.270 0.66
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.42
image


Aspheric coefficient teleconverter lens 16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.7478E-03 -1.0687E-02 9.4044E-03 4.4476E-03 -1.3159E-03
A6 -2.1302E-04 -4.7649E-03 -2.4656E-03 -3.1656E-04 -3.8179E-04
A8 4.8701E-05 1.2842E-03 5.9228E-04 -3.3166E-05 2.6103E-05
A10 -7.0256E-06 -6.0994E-04 -1.3386E-04 8.1014E-06 -6.0956E-07
A12 2.0891E-05 -4.0488E-07

21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -7.1183E-03 7.1241E-03 3.6705E-03 -3.1659E-03 -1.6287E-03
A6 -5.9631E-05 -3.3629E-04 -2.5811E-04 -3.8574E-04 -2.3319E-04
A8 1.4743E-05 -1.3205E-05 -6.1048E-06 7.7759E-05 1.3985E-04
A10 -4.2187E-07 1.2183E-06 1.0207E-06 -6.1026E-06 -1.4032E-05
A12 -2.4140E-08 -2.5103E-08 2.5229E-07 7.0687E-07

Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04

37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.40
F number 4.50
Half angle of view 10.9
Statue height 3.02
Total lens length 53.49
Back focus 1.26
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point. The focal length of the main lens is 4.33 mm.
Converter magnification 3.56
　図１８は実施例８の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 18 is an aberration diagram of Example 8 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例７のテレコンバータレンズでは、倍率が３．５６であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、４．４８ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 7, the magnification is 3.56, and the primary imaging point position is 4.48 mm from the main lens side surface of the eighth lens L8 to the main lens side (paraxial). value).
（実施例９）
　実施例９のレンズデータを表９に示す。図１９は、実施例９の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、第１の正レンズ群ＧＲ１（＋）を構成する正の屈折力を有する第１レンズＬ１（Ｐ２レンズ）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第２レンズＬ２（Ｎ１レンズ）と正の屈折力を有する第３レンズＬ３（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第４レンズＬ４（Ｐ４レンズ）と負の屈折力を有する第５レンズＬ５（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、負の屈折力を有する第６レンズＬ６（Ｎ３レンズ）と、被写体側に凹面を向けたメニスカスレンズである第７レンズＬ７と、第８レンズＬ８（Ｐ５レンズ）と、第９レンズＬ９と、反射光学素子である第２プリズムＰＳ２と、第１０レンズＬ１０（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第８レンズＬ８が対物部であり、第９レンズＬ９～第１０レンズＬ１０がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号８，１３は接合レンズの接着剤を表す。 Example 9
Table 9 shows lens data of Example 9. FIG. 19 is a cross-sectional view of the image pickup optical system according to the ninth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first lens L1 (P2 lens) having a positive refractive power that constitutes the first positive lens group GR1 (+), and a first prism PS1 that is a reflective optical element. A negative lens group GR (−) composed of a cemented lens in which a second lens L2 having negative refractive power (N1 lens) and a third lens L3 having positive refractive power (P3 lens) are cemented, and positive refraction. A second positive lens group GR2 (+) composed of a cemented lens obtained by cementing a fourth lens L4 (P4 lens) having power and a fifth lens L5 (N2 lens) having negative refractive power; A sixth lens L6 (N3 lens) having a concave surface, a seventh lens L7 that is a meniscus lens having a concave surface facing the object side, an eighth lens L8 (P5 lens), a ninth lens L9, and a reflective optical element. Second prism P 2, consisting of a tenth lens L10 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the eighth lens L8 are objective parts, and the ninth lens L9 to the tenth lens L10 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 8 and 13 represent adhesives for the cemented lens.
［表９］
"実施例９"
面番号：テレコンバータレンズｓ１～ｓ２９，主レンズｓ３０～ｓ４３
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2
2                 ∞      0.50        
3                 15.181  1.56    1.48749     70.4
4               -17.125   0.50        
5                 ∞      6.07    1.84666     23.8
6                 ∞      1.04        
7                 -6.762  0.90    1.80518     25.5 
8                 7.179   0.01    1.51400     42.8 
9                 7.179   2.12    1.74330     49.2 
10              -46.868   0.20        
11(絞り)          ∞      1.89        
12                7.623   1.31    1.67270     32.2 
13                -9.064  0.01    1.51400     42.8 
14                -9.064  0.57    1.59349     67.0 
15              -28.700   0.41        
16  *             4.006   2.50    1.54470     56.2 
17  *             1.843   2.23        
18  *             -3.356  2.20    1.54470     56.2 
19  *             -3.952  2.56        
20  *             5.237   1.85    1.54470     56.2 
21  *             5.610   5.86        
22  *             34.472  3.00    1.54470     56.2 
23  *             -5.083  0.15        
24                ∞      6.88    1.84666     23.8 
25                ∞      0.15        
26  *             5.733   1.95    1.54470     56.2 
27  *             28.884  0.39        
28                ∞      0.79    1.84666     23.8 
29                ∞      0.64        
30                ∞      0.79    1.51633     64.1 
31                ∞      1.04        
32                1.676   0.63    1.54470     56.2 
33              -13.857   0.05        
34                4.012   0.28    1.63469     23.9 
35                1.559   0.57        
36              -36.876   0.31    1.63469     23.9 
37              -35.075   0.42        
38                -6.434  0.86    1.54470     56.2 
39                -0.965  0.23        
40                -2.637  0.45    1.53048     55.7 
41                1.582   0.64        
42                ∞      0.30    1.51633     64.1 
43                ∞      0.40
像


非球面係数
テレコンバータレンズ
    第16面       第17面       第18面       第19面       第20面
K   0.000         0.000        0.000        0.000        0.000 
A4  -1.1682E-03  -8.7147E-03   4.3885E-03   2.1552E-03  -2.3384E-03
A6  -2.4625E-04  -5.7373E-03  -2.0892E-03  -3.0621E-04  -3.4228E-04
A8  3.4581E-05    1.2965E-03   3.6225E-04  -4.3597E-05   2.6125E-05
A10 -2.7952E-06  -5.8640E-04  -1.5758E-04   8.1813E-06  -6.1253E-07
A12                            2.7750E-05  -3.8947E-07 

    第21面        第22面      第23面       第26面       第27面
K   0.000         0.000        0.000        0.000        0.000 
A4  -6.5123E-03   5.8380E-03   6.5061E-03   2.8182E-03  -2.8515E-03
A6  -8.6760E-05  -2.7909E-04  -1.8708E-04  -5.9667E-04  -5.2299E-05
A8  1.5180E-05   -1.1699E-05  -8.6025E-06   8.8685E-05   1.3553E-04
A10 -3.8706E-07   1.2976E-06   1.0707E-06  -5.2053E-06  -1.4406E-05
A12              -2.8034E-08  -2.2309E-08   2.1360E-07   6.5216E-07

主レンズ                    
    第32面      第33面      第34面       第35面       第36面
K   -0.025      -29.823      -30.000      -6.295        30.000 
A4  5.4737E-03   2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03   3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03 -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02  -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02  2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03               -1.8876E-02   2.2070E-02  -6.3386E-04

    第37面       第38面      第39面       第40面       第41面
K   30.000        7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02 -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03  7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03 -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04  1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                             2.8800E-06  3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.38
Fナンバー   4.50
半画角      10.9
像高        3.02
レンズ全長  54.70
バックフォーカス    1.24
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.55
[Table 9]
"Example 9"
Surface number: teleconverter lenses s1 to s29, main lenses s30 to s43
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 15.181 1.56 1.48749 70.4
4 -17.125 0.50
5 ∞ 6.07 1.84666 23.8
6 ∞ 1.04
7 -6.762 0.90 1.80518 25.5
8 7.179 0.01 1.51400 42.8
9 7.179 2.12 1.74330 49.2
10 -46.868 0.20
11 (Aperture) ∞ 1.89
12 7.623 1.31 1.67270 32.2
13 -9.064 0.01 1.51400 42.8
14 -9.064 0.57 1.59349 67.0
15 -28.700 0.41
16 * 4.006 2.50 1.54470 56.2
17 * 1.843 2.23
18 * -3.356 2.20 1.54470 56.2
19 * -3.952 2.56
20 * 5.237 1.85 1.54470 56.2
21 * 5.610 5.86
22 * 34.472 3.00 1.54470 56.2
23 * -5.083 0.15
24 ∞ 6.88 1.84666 23.8
25 ∞ 0.15
26 * 5.733 1.95 1.54470 56.2
27 * 28.884 0.39
28 ∞ 0.79 1.84666 23.8
29 ∞ 0.64
30 ∞ 0.79 1.51633 64.1
31 ∞ 1.04
32 1.676 0.63 1.54470 56.2
33 -13.857 0.05
34 4.012 0.28 1.63469 23.9
35 1.559 0.57
36 -36.876 0.31 1.63469 23.9
37 -35.075 0.42
38 -6.434 0.86 1.54470 56.2
39 -0.965 0.23
40 -2.637 0.45 1.53048 55.7
41 1.582 0.64
42 ∞ 0.30 1.51633 64.1
43 ∞ 0.40
image


Aspheric coefficient teleconverter lens 16th surface 17th surface 18th surface 19th surface 20th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.1682E-03 -8.7147E-03 4.3885E-03 2.1552E-03 -2.3384E-03
A6 -2.4625E-04 -5.7373E-03 -2.0892E-03 -3.0621E-04 -3.4228E-04
A8 3.4581E-05 1.2965E-03 3.6225E-04 -4.3597E-05 2.6125E-05
A10 -2.7952E-06 -5.8640E-04 -1.5758E-04 8.1813E-06 -6.1253E-07
A12 2.7750E-05 -3.8947E-07

21st surface 22nd surface 23rd surface 26th surface 27th surface
K 0.000 0.000 0.000 0.000 0.000
A4 -6.5123E-03 5.8380E-03 6.5061E-03 2.8182E-03 -2.8515E-03
A6 -8.6760E-05 -2.7909E-04 -1.8708E-04 -5.9667E-04 -5.2299E-05
A8 1.5180E-05 -1.1699E-05 -8.6025E-06 8.8685E-05 1.3553E-04
A10 -3.8706E-07 1.2976E-06 1.0707E-06 -5.2053E-06 -1.4406E-05
A12 -2.8034E-08 -2.2309E-08 2.1360E-07 6.5216E-07

Main lens
32nd surface 33rd surface 34th surface 35th surface 36th surface
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04

37th surface 38th surface 39th surface 40th surface 41st surface
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.38
F number 4.50
Half angle of view 10.9
Statue height 3.02
Total lens length 54.70
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point. The focal length of the main lens is 4.33 mm.
Converter magnification 3.55
　図２０は実施例９の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 20 is an aberration diagram of Example 9 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例７のテレコンバータレンズでは、倍率が３．５５であり、１次結像点位置は第８レンズＬ８の主レンズ側面より主レンズ側に、３．３２ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 7, the magnification is 3.55, and the primary imaging point position is 3.32 mm from the side of the main lens side of the eighth lens L8 to the main lens side (paraxial). value).
（実施例１０）
　実施例１０のレンズデータを表１０に示す。図２１は、実施例１０の撮像光学系の断面図である。テレコンバータレンズＣＬは、被写体側から順に、正の屈折力を有する第１の正レンズ群ＧＲ１（＋）、負の屈折力を有する負レンズ群ＧＲ（－），第２の正レンズ群ＧＲ２（＋）及びその他のレンズ群を有する。具体的には、テレコンバータレンズＣＬは、負の屈折力を有するレンズＬ１と正の屈折力を有するレンズＬ２とを接合した接合レンズからなる第１の正レンズ群ＧＲ１（＋）と、反射光学素子である第１プリズムＰＳ１と、負の屈折力を有する第３レンズＬ３（Ｎ１レンズ）と正の屈折力を有する第４レンズＬ４（Ｐ３レンズ）とを接合した接合レンズからなる負レンズ群ＧＲ（－）と、正の屈折力を有する第５レンズＬ５（Ｐ４レンズ）と負の屈折力を有する第６レンズＬ６（Ｎ２レンズ）とを接合した接合レンズからなる第２の正レンズ群ＧＲ２（＋）と、負の屈折力を有する第７レンズＬ７（Ｎ３レンズ）と、被写体側に凹面を向けたメニスカスレンズである第８レンズＬ８と、第９レンズＬ９（Ｐ５レンズ）と、第１０レンズＬ１０と、反射光学素子である第２プリズムＰＳ２と、第１１レンズＬ１１（Ｐ１レンズ）とからなる。ＭＬは、撮像装置に備えられた主レンズである。又、Ｓは負レンズ群ＧＲ（－）と第２の正レンズ群ＧＲ２（＋）との間に設けられた開口絞り、ＩＭは撮像装置の撮像面を示す。なお、第１レンズＬ１～第９レンズＬ９が対物部であり、第１０レンズＬ１０～第１１レンズＬ１１がリレー部である。また、ＣＧ１～ＣＧ４は、カバーガラス、光学的ローパスフィルタやＩＲカットフィルタ、固体撮像素子のシールガラス等を想定した平行平板を示す。以下の表で、面番号４，１０、１５は接合レンズの接合レンズの接着剤を表す。 (Example 10)
Table 10 shows lens data of Example 10. FIG. 21 is a sectional view of the image pickup optical system according to the tenth embodiment. The teleconverter lens CL includes, in order from the subject side, a first positive lens group GR1 (+) having a positive refractive power, a negative lens group GR (−) having a negative refractive power, and a second positive lens group GR2 ( +) And other lens groups. Specifically, the teleconverter lens CL includes a first positive lens group GR1 (+) composed of a cemented lens obtained by cementing a lens L1 having negative refractive power and a lens L2 having positive refractive power, and reflective optics. A negative lens group GR composed of a cemented lens in which the first prism PS1, which is an element, a third lens L3 (N1 lens) having negative refractive power, and a fourth lens L4 (P3 lens) having positive refractive power are cemented together. (−) And a second positive lens group GR2 including a cemented lens in which a fifth lens L5 (P4 lens) having a positive refractive power and a sixth lens L6 (N2 lens) having a negative refractive power are cemented. +), A seventh lens L7 (N3 lens) having negative refractive power, an eighth lens L8 which is a meniscus lens having a concave surface facing the object side, a ninth lens L9 (P5 lens), and a tenth lens L10 , A second prism PS2 is a reflecting optical element, consisting of the first 11 lens L11 (P1 lens). ML is a main lens provided in the imaging apparatus. S denotes an aperture stop provided between the negative lens group GR (−) and the second positive lens group GR2 (+), and IM denotes an imaging surface of the imaging apparatus. The first lens L1 to the ninth lens L9 are objective parts, and the tenth lens L10 to the eleventh lens L11 are relay parts. Reference numerals CG1 to CG4 denote parallel plates assuming a cover glass, an optical low-pass filter, an IR cut filter, a seal glass for a solid-state image sensor, and the like. In the following table, surface numbers 4, 10, and 15 represent cemented lens adhesives of the cemented lens.
［表１０］
"実施例１０"
面番号：テレコンバータレンズｓ１～ｓ３１，主レンズｓ３２～ｓ４５
面番号(非球面)    R(mm)   d(mm)   nd         νd
1                 ∞      0.79    1.51633     64.2 
2                 ∞      0.50        
3                 38.849  0.50    1.85101     39.3 
4                 18.852  0.01    1.51400     42.8 
5                 18.850  1.50    1.49829     80.2 
6               -11.132   0.50        
7                 ∞      5.43    1.84666     23.8 
8                 ∞      0.91        
9                 -5.647  0.63    1.80518     25.5 
10                26.223  0.01    1.51400     42.8 
11                26.223  1.76    1.74330     49.2 
12              -11.007   0.20        
13(絞り)          ∞      0.62        
14                11.917  3.18    1.67270     32.2 
15                -7.885  0.01    1.51400     42.8 
16                -7.885  0.85    1.59349     67.0 
17              -21.994   0.38        
18  *             3.807   2.50    1.54470     56.2 
19  *             1.839   2.26        
20  *             -2.668  2.20    1.54470     56.2 
21  *             -3.352  3.84        
22  *             5.113   1.88    1.54470     56.2 
23  *             5.245   6.45        
24  *             99.900  3.00    1.54470     56.2 
25  *             -5.390  0.15        
26                ∞      6.90    1.84666     23.8 
27                ∞      0.36        
28  *             6.778   1.86    1.54470     56.2 
29  *           -55.770   0.30        
30                ∞      0.79    1.84666     23.8 
31                ∞      0.64        
32                ∞      0.79    1.51633     64.1 
33                ∞      1.04        
34                1.676   0.63    1.54470     56.2 
35              -13.857   0.05        
36                4.012   0.28    1.63469     23.9 
37                1.559   0.57        
38              -36.876   0.31    1.63469     23.9 
39              -35.075   0.42        
40                -6.434  0.86    1.54470     56.2 
41                -0.965  0.23        
42                -2.637  0.45    1.53048     55.7 
43                1.582   0.64        
44                 ∞     0.30    1.51633     64.1 
45                 ∞     0.40
像


非球面係数
テレコンバータレンズ
    第18面       第19面       第20面       第21面      第22面
K   0.000         0.000        0.000         0.000       0.000 
A4  -1.0205E-03  -1.1371E-02   3.1507E-03   1.7942E-03  -2.6723E-03
A6  -7.7319E-05  -4.1918E-03  -1.6630E-03  -1.2789E-04  -3.2482E-04
A8  7.4450E-06    8.3782E-04   4.9113E-04  -1.8723E-05   2.5269E-05
A10 -4.5547E-07  -5.0387E-04  -1.1008E-04   8.4042E-06  -6.3001E-07
A12                            1.6970E-05  -5.0810E-07 


    第23面       第24面       第25面       第28面       第29面
K   0.000         0.000        0.000         0.000       0.000 
A4  -7.0594E-03   6.9260E-03   6.7645E-03   2.4508E-03  -1.0430E-03
A6  -7.3357E-05  -3.0090E-04  -2.1169E-04  -5.6239E-04  -2.6646E-04
A8  1.5009E-05   -1.2001E-05  -8.3369E-06   7.8240E-05   1.2515E-04
A10 -4.2664E-07   1.2709E-06   1.0762E-06  -4.9246E-06  -1.3605E-05
A12              -2.6653E-08  -2.3995E-08   2.0634E-07   6.8232E-07

主レンズ                    
    第34面        第35面      第36面      第37面      第38面
K   -0.025        -29.823     -30.000      -6.295        30.000 
A4  5.4737E-03    2.9864E-02  -4.4484E-02   4.7985E-02  -1.2218E-01
A6  1.8802E-03    3.6878E-02   1.4564E-01   5.1872E-02  -2.6536E-02
A8  -3.1928E-03  -4.3208E-02  -1.2728E-01  -1.8852E-02   6.2354E-02
A10 1.7037E-02   -2.3999E-02  -3.2604E-02  -6.3501E-03   2.0372E-02
A12 -2.1868E-02   2.7062E-02   7.7790E-02  -4.1075E-03  -1.8554E-02
A14 8.4210E-03                -1.8876E-02   2.2070E-02  -6.3386E-04


    第39面       第40面      第41面       第42面       第43面
K   30.000        7.826       -4.059       -30.000      -12.523 
A4  -1.0027E-01  -3.7724E-04  -4.3185E-02  -1.4223E-02  -3.6784E-02
A6  3.0627E-03    2.0421E-02   5.1578E-02  -1.5539E-03   7.2592E-03
A8  1.9106E-02   -1.1047E-03  -1.1842E-02   2.1085E-03  -1.4441E-03
A10 1.6054E-02   -1.6207E-03   6.5318E-04  -1.9864E-04   1.4444E-04
A12 -2.2771E-03   2.6445E-04   1.9046E-05  -2.5376E-05  -5.0337E-06
A14 -2.7944E-03                             2.8800E-06  3.2341E-08


テレコンバータレンズと主レンズの合成光学系における値
焦点距離    15.15
Fナンバー   4.50
半画角      11.1
像高        3.02
レンズ全長  56.59 
バックフォーカス    1.24
ただし、レンズ全長は第1レンズ被写体側面から主レンズ近軸像点までの距離
主レンズの焦点距離  4.33mm
コンバータ倍率      3.50
[Table 10]
"Example 10"
Surface number: teleconverter lenses s1 to s31, main lenses s32 to s45
Surface number (aspherical surface) R (mm) d (mm) nd νd
1 ∞ 0.79 1.51633 64.2
2 ∞ 0.50
3 38.849 0.50 1.85101 39.3
4 18.852 0.01 1.51400 42.8
5 18.850 1.50 1.49829 80.2
6 -11.132 0.50
7 ∞ 5.43 1.84666 23.8
8 ∞ 0.91
9 -5.647 0.63 1.80518 25.5
10 26.223 0.01 1.51400 42.8
11 26.223 1.76 1.74330 49.2
12 -11.007 0.20
13 (Aperture) ∞ 0.62
14 11.917 3.18 1.67270 32.2
15 -7.885 0.01 1.51400 42.8
16 -7.885 0.85 1.59349 67.0
17 -21.994 0.38
18 * 3.807 2.50 1.54470 56.2
19 * 1.839 2.26
20 * -2.668 2.20 1.54470 56.2
21 * -3.352 3.84
22 * 5.113 1.88 1.54470 56.2
23 * 5.245 6.45
24 * 99.900 3.00 1.54470 56.2
25 * -5.390 0.15
26 ∞ 6.90 1.84666 23.8
27 ∞ 0.36
28 * 6.778 1.86 1.54470 56.2
29 * -55.770 0.30
30 ∞ 0.79 1.84666 23.8
31 ∞ 0.64
32 ∞ 0.79 1.51633 64.1
33 ∞ 1.04
34 1.676 0.63 1.54470 56.2
35 -13.857 0.05
36 4.012 0.28 1.63469 23.9
37 1.559 0.57
38 -36.876 0.31 1.63469 23.9
39 -35.075 0.42
40 -6.434 0.86 1.54470 56.2
41 -0.965 0.23
42 -2.637 0.45 1.53048 55.7
43 1.582 0.64
44 ∞ 0.30 1.51633 64.1
45 ∞ 0.40
image


Aspheric coefficient teleconverter lens 18th surface 19th surface 20th surface 21st surface 22nd surface
K 0.000 0.000 0.000 0.000 0.000
A4 -1.0205E-03 -1.1371E-02 3.1507E-03 1.7942E-03 -2.6723E-03
A6 -7.7319E-05 -4.1918E-03 -1.6630E-03 -1.2789E-04 -3.2482E-04
A8 7.4450E-06 8.3782E-04 4.9113E-04 -1.8723E-05 2.5269E-05
A10 -4.5547E-07 -5.0387E-04 -1.1008E-04 8.4042E-06 -6.3001E-07
A12 1.6970E-05 -5.0810E-07


23rd 24th 25th 28th 29th
K 0.000 0.000 0.000 0.000 0.000
A4 -7.0594E-03 6.9260E-03 6.7645E-03 2.4508E-03 -1.0430E-03
A6 -7.3357E-05 -3.0090E-04 -2.1169E-04 -5.6239E-04 -2.6646E-04
A8 1.5009E-05 -1.2001E-05 -8.3369E-06 7.8240E-05 1.2515E-04
A10 -4.2664E-07 1.2709E-06 1.0762E-06 -4.9246E-06 -1.3605E-05
A12 -2.6653E-08 -2.3995E-08 2.0634E-07 6.8232E-07

Main lens
34th 35th 36th 37th 38th
K -0.025 -29.823 -30.000 -6.295 30.000
A4 5.4737E-03 2.9864E-02 -4.4484E-02 4.7985E-02 -1.2218E-01
A6 1.8802E-03 3.6878E-02 1.4564E-01 5.1872E-02 -2.6536E-02
A8 -3.1928E-03 -4.3208E-02 -1.2728E-01 -1.8852E-02 6.2354E-02
A10 1.7037E-02 -2.3999E-02 -3.2604E-02 -6.3501E-03 2.0372E-02
A12 -2.1868E-02 2.7062E-02 7.7790E-02 -4.1075E-03 -1.8554E-02
A14 8.4210E-03 -1.8876E-02 2.2070E-02 -6.3386E-04


No. 39 No. 40 No. 41 No. 42 No. 42 No. 43
K 30.000 7.826 -4.059 -30.000 -12.523
A4 -1.0027E-01 -3.7724E-04 -4.3185E-02 -1.4223E-02 -3.6784E-02
A6 3.0627E-03 2.0421E-02 5.1578E-02 -1.5539E-03 7.2592E-03
A8 1.9106E-02 -1.1047E-03 -1.1842E-02 2.1085E-03 -1.4441E-03
A10 1.6054E-02 -1.6207E-03 6.5318E-04 -1.9864E-04 1.4444E-04
A12 -2.2771E-03 2.6445E-04 1.9046E-05 -2.5376E-05 -5.0337E-06
A14 -2.7944E-03 2.8800E-06 3.2341E-08


Value focal length in the combined optical system of teleconverter lens and main lens 15.15
F number 4.50
Half angle of view 11.1
Statue height 3.02
Total lens length 56.59
Back focus 1.24
However, the total lens length is the distance from the subject side of the first lens to the main lens paraxial image point.
Converter magnification 3.50
　図２２は実施例１０の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。収差図はコンバータレンズと主レンズを組み合わせた状態のものであり、本実施例は図２３に示す収差特性を有する主レンズと組み合わされている。 FIG. 22 is an aberration diagram of Example 10 (spherical aberration (a), astigmatism (b), distortion (c)). The aberration diagram shows a state in which the converter lens and the main lens are combined, and this embodiment is combined with the main lens having the aberration characteristics shown in FIG.
　第１の正レンズ群ＧＲ１（＋）、負レンズ群ＧＲ（－）、第２の正レンズ群ＧＲ２（＋）のいずれかを一体に光軸方向に移動させることによって、無限遠から有限距離への合焦を行うことが出来る。ただし、レンズ移動によりピントが変化するのであれば、それ以外のレンズ群移動であっても良い。又、実施例７のテレコンバータレンズでは、倍率が３．５０であり、１次結像点位置は第９レンズＬ９の主レンズ側面より主レンズ側に、４．３８ｍｍの位置である（近軸値）。 By moving any one of the first positive lens group GR1 (+), the negative lens group GR (−), and the second positive lens group GR2 (+) in the optical axis direction, the distance from infinity to a finite distance is increased. Focus can be performed. However, as long as the focus changes due to lens movement, other lens group movement may be used. In the teleconverter lens of Example 7, the magnification is 3.50, and the primary image formation point position is 4.38 mm from the main lens side surface of the ninth lens L9 to the main lens side (paraxial). value).
　各条件式に対応する各実施例の値を表１１に示す。 Table 11 shows values of each example corresponding to each conditional expression.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　本発明は、明細書に記載の実施形態、実施例に限定されるものではなく、他の実施形態・実施例・変形例を含むことは、本明細書に記載された実施形態や実施例や技術思想から本分野の当業者にとって明らかである。例えば、実質的にパワーを持たないダミーレンズを更に付与した場合でも本発明の適用範囲内である。 The present invention is not limited to the embodiments and examples described in the specification, and includes other embodiments, examples, and modified examples. It will be apparent to those skilled in the art from the technical idea. For example, even when a dummy lens having substantially no power is further provided, it is within the scope of the present invention.
ＢＤ ボディ
ＢＸ 筐体
ＣＬ コンバータレンズ
ＭＬ 主レンズ
ＳＦ 携帯端末 BD Body BX Case CL Converter lens ML Main lens SF Mobile terminal

Claims (19)

  1. 　主レンズより被写体側に装着され、前記主レンズの焦点距離を変換可能なテレコンバータレンズにおいて、
    　前記テレコンバータレンズに入射した光束は対物部によって１次結像した後にリレー部を介して前記主レンズに入射するようになっており、
    　前記対物部は、被写体側から順に配置された、正の屈折力を有する第１の正レンズ群、負の屈折力を有する負レンズ群を含み、
    　前記リレー部は、前記主レンズ側から順に配置された、正の屈折力を有するＰ２レンズ、光路を折り曲げるための反射光学素子を含み、前記第１の正レンズ群は、２枚以下のレンズからなることを特徴とするテレコンバータレンズ。     In the teleconverter lens that is attached to the subject side from the main lens and can convert the focal length of the main lens,
    The light beam incident on the teleconverter lens is designed to be incident on the main lens via a relay unit after primary image formation by the objective unit,
    The objective unit includes a first positive lens group having a positive refractive power and a negative lens group having a negative refractive power, which are arranged in order from the subject side.
    The relay unit includes a P2 lens having a positive refractive power and a reflective optical element for bending an optical path, which are arranged in order from the main lens side, and the first positive lens group includes two or less lenses. A teleconverter lens characterized by
  2. 　前記第１の正レンズ群は、正の屈折力を有するＰ２レンズからなることを特徴とする請求項１に記載のテレコンバータレンズ。 The teleconverter lens according to claim 1, wherein the first positive lens group includes a P2 lens having a positive refractive power.
  3. 　前記Ｐ２レンズは（１）式を満たすことを特徴とする請求項２に記載のテレコンバータレンズ。
    　０．５　＜　ｆＰ２　／　ｆＯ　＜　１．５　　　（１）
    ただし、
    ｆＰ２：前記Ｐ２レンズの焦点距離
    ｆＯ：前記対物部の焦点距離     The teleconverter lens according to claim 2, wherein the P2 lens satisfies the expression (1).
    0.5 <fP2 / fO <1.5 (1)
    However,
    fP2: focal length of the P2 lens fO: focal length of the objective unit
  4. 　前記Ｐ２レンズは（２）式を満たすことを特徴とする請求項２又は３に記載のテレコンバータレンズ。
    　ｖＰ２　＞　６０　　（２）
    ただし、
    ｖＰ２：前記Ｐ２レンズのアッベ数     The teleconverter lens according to claim 2, wherein the P2 lens satisfies the expression (2).
    vP2> 60 (2)
    However,
    vP2: Abbe number of the P2 lens
  5. 　前記第１の正レンズ群は、負レンズ１枚と正レンズ１枚からなることを特徴とする請求項１に記載のテレコンバータレンズ。 The teleconverter lens according to claim 1, wherein the first positive lens group includes one negative lens and one positive lens.
  6. 　前記第１の反射光学素子より前記主レンズ側に、前記負レンズ群、開口絞り、第２の正レンズ群を有することを特徴とする請求項１～５のいずれかに記載のテレコンバータレンズ。 The teleconverter lens according to any one of claims 1 to 5, further comprising the negative lens group, an aperture stop, and a second positive lens group closer to the main lens than the first reflective optical element.
  7. 　前記負レンズ群は（３）式を満たすことを特徴とする請求項６に記載のテレコンバータレンズ。
    　－１．３　＜　ｆＧＮ　／　ｆＯ　＜　－０．２　　　（３）
    但し
    ｆＧＮ：前記負レンズ群の焦点距離
    ｆＯ：前記対物部の焦点距離     The teleconverter lens according to claim 6, wherein the negative lens group satisfies the expression (3).
    -1.3 <fGN / fO <-0.2 (3)
    Where fGN: focal length of the negative lens group fO: focal length of the objective unit
  8. 　前記負レンズ群は、負の屈折力を有するＮ１レンズと正の屈折力を有するＰ３レンズの接合レンズからなることを特徴とする請求項６又は７に記載のテレコンバータレンズ。 The teleconverter lens according to claim 6 or 7, wherein the negative lens group includes a cemented lens of an N1 lens having a negative refractive power and a P3 lens having a positive refractive power.
  9. 　（４）式を満たすことを特徴とする請求項８に記載のテレコンバータレンズ。
    　２０　＜　ｖＰ３　－　ｖＮ１　＜　２９　　　（４）
    但し
    ｖｐ３：前記Ｐ３レンズのアッベ数
    ｖＮ１：前記Ｎ１レンズのアッベ数     The teleconverter lens according to claim 8, wherein the expression (4) is satisfied.
    20 <vP3-vN1 <29 (4)
    Where vp3: Abbe number of the P3 lens vN1: Abbe number of the N1 lens
  10. 　前記第２の正レンズ群は（５）式を満たすことを特徴とする請求項６～９のいずれかに記載のテレコンバータレンズ。
    　０．３　＜　ｆＧＰ　／　ｆＯ　＜　２．０　　　（５）
    但し
    ｆＧＰ：前記第２の正レンズ群の焦点距離     The teleconverter lens according to any one of claims 6 to 9, wherein the second positive lens group satisfies the expression (5).
    0.3 <fGP / fO <2.0 (5)
    Where fGP: focal length of the second positive lens group
  11. 　前記第２の正レンズ群は、正の屈折力を有するＰ４レンズと負の屈折力を有するＮ２レンズの接合レンズからなることを特徴とする請求項６～１０のいずれかに記載のテレコンバータレンズ。 The teleconverter lens according to any one of claims 6 to 10, wherein the second positive lens group includes a cemented lens of a P4 lens having a positive refractive power and an N2 lens having a negative refractive power. .
  12. 　前記第２の正レンズ群は（６）式を満たすことを特徴とする請求項１１に記載のテレコンバータレンズ。
    　６　＜　ｖＮ２　－　ｖＰ４　＜　３５　　　（６）
    但し
    ｖｐ４：前記Ｐ４レンズのアッベ数
    ｖＮ２：前記Ｎ２レンズのアッベ数     The teleconverter lens according to claim 11, wherein the second positive lens group satisfies the expression (6).
    6 <vN2−vP4 <35 (6)
    Where vp4: Abbe number of the P4 lens vN2: Abbe number of the N2 lens
  13. 　前記第２の正レンズ群より主レンズ側に、負の屈折力を有するＮ３レンズ、被写体側に凹面を向けたメニスカスレンズ、正の屈折力を有するＰ５レンズが配置されてなることを特徴とする請求項６～１２のいずれかに記載のテレコンバータレンズ。 An N3 lens having negative refractive power, a meniscus lens having a concave surface facing the object side, and a P5 lens having positive refractive power are disposed on the main lens side of the second positive lens group. The teleconverter lens according to any one of claims 6 to 12.
  14. 　前記最も主レンズ側に正の屈折力を有するＰ１レンズを有し、（７）式を満たすことを特徴とする請求項１～１３のいずれかに記載のテレコンバータレンズ。
    　１．０　＜　ｆＰ１　／　ｆＲ　＜　２．１　　（７）
    但し　
    ｆＰ１：前記Ｐ１レンズの焦点距離
    ｆＲ：前記リレー部の焦点距離     The teleconverter lens according to any one of claims 1 to 13, wherein the teleconverter lens has a P1 lens having a positive refractive power on the most main lens side and satisfies the expression (7).
    1.0 <fP1 / fR <2.1 (7)
    However,
    fP1: focal length of the P1 lens fR: focal length of the relay unit
  15. 　前記リレー部を構成する屈折力を有する光学素子は２枚であることを特徴とする請求項１～１４のいずれかに記載のテレコンバータレンズ。 The teleconverter lens according to any one of claims 1 to 14, wherein there are two optical elements having refractive power constituting the relay unit.
  16. 　光路折り曲げのための反射回数が２回以下であることを特徴とする請求項１～１５のいずれかに記載のテレコンバータレンズ。 16. The teleconverter lens according to claim 1, wherein the number of reflections for bending the optical path is two or less.
  17. 　被写体距離が変化した際の焦点位置ずれを、前記テレコンバータレンズ内の一部のレンズを光軸方向に移動させることで補正することを特徴とする請求項１～１６のいずれかに記載のテレコンバータレンズ。 The telephoto lens according to any one of claims 1 to 16, wherein a focal position shift when the subject distance changes is corrected by moving a part of the teleconverter lens in the optical axis direction. Converter lens.
  18. 　（８）式を満たすことを特徴とする請求項１～１７のいずれかに記載の撮像装置。
    　３　＜　ｆＴＯ　／　ｆＭ　＜　５．５
    但し
    ｆＴＯ：前記コンバータレンズを前記主レンズの被写体側に配置した状態の、全系の焦点距離
    ｆＭ：前記主レンズの焦点距離     The image pickup apparatus according to any one of claims 1 to 17, wherein the expression (8) is satisfied.
    3 <fTO / fM <5.5
    Where fTO: focal length of the entire system with the converter lens disposed on the subject side of the main lens fM: focal length of the main lens
  19. 　請求項１～１８のいずれかに記載のテレコンバータレンズを搭載したことを特徴とする撮像装置。 An image pickup apparatus comprising the teleconverter lens according to any one of claims 1 to 18.
PCT/JP2013/060781 2012-04-13 2013-04-10 Teleconverter lens and imaging device WO2013154122A1 (en)

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JP2017211477A (en) * 2016-05-25 2017-11-30 富士フイルム株式会社 Image forming optical system, projection type display device, and imaging device
WO2019126516A1 (en) * 2017-12-21 2019-06-27 Apple Inc. Folded lens system
CN114174887A (en) * 2019-07-22 2022-03-11 苹果公司 Camera comprising two light folding elements
US11971651B2 (en) 2018-05-31 2024-04-30 Apple Inc. Folded camera with actuator for moving optics

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JPS63276012A (en) * 1987-05-08 1988-11-14 Nikon Corp Re-image forming optical system
JPH03136013A (en) * 1989-10-20 1991-06-10 Canon Inc Keplerian teleconverter lens
JP2005265878A (en) * 2004-03-16 2005-09-29 Canon Inc Optical system having image rotation function
JP2011007824A (en) * 2009-06-23 2011-01-13 Canon Inc Optical device

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JPS61193113A (en) * 1985-02-21 1986-08-27 Sigma:Kk Auxiliary telephoto lens system
JPS63276012A (en) * 1987-05-08 1988-11-14 Nikon Corp Re-image forming optical system
JPH03136013A (en) * 1989-10-20 1991-06-10 Canon Inc Keplerian teleconverter lens
JP2005265878A (en) * 2004-03-16 2005-09-29 Canon Inc Optical system having image rotation function
JP2011007824A (en) * 2009-06-23 2011-01-13 Canon Inc Optical device

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Publication number Priority date Publication date Assignee Title
JP2017211477A (en) * 2016-05-25 2017-11-30 富士フイルム株式会社 Image forming optical system, projection type display device, and imaging device
US10451854B2 (en) 2016-05-25 2019-10-22 Fujifilm Corporation Imaging optical system, projection-type display apparatus, and imaging apparatus
WO2019126516A1 (en) * 2017-12-21 2019-06-27 Apple Inc. Folded lens system
CN111512204A (en) * 2017-12-21 2020-08-07 苹果公司 Folded lens system
US11029496B2 (en) 2017-12-21 2021-06-08 Apple Inc. Folded lens system
CN111512204B (en) * 2017-12-21 2022-07-26 苹果公司 Folded lens system
US11899186B2 (en) 2017-12-21 2024-02-13 Apple Inc. Folded lens system
US11971651B2 (en) 2018-05-31 2024-04-30 Apple Inc. Folded camera with actuator for moving optics
CN114174887A (en) * 2019-07-22 2022-03-11 苹果公司 Camera comprising two light folding elements

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