JP6507471B2 - Optical system and optical device - Google Patents

Optical system and optical device Download PDF

Info

Publication number
JP6507471B2
JP6507471B2 JP2014027497A JP2014027497A JP6507471B2 JP 6507471 B2 JP6507471 B2 JP 6507471B2 JP 2014027497 A JP2014027497 A JP 2014027497A JP 2014027497 A JP2014027497 A JP 2014027497A JP 6507471 B2 JP6507471 B2 JP 6507471B2
Authority
JP
Japan
Prior art keywords
lens
optical
vibration
positive
conditional expression
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2014027497A
Other languages
Japanese (ja)
Other versions
JP2015152812A (en
Inventor
幸介 町田
幸介 町田
Original Assignee
株式会社ニコン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ニコン filed Critical 株式会社ニコン
Priority to JP2014027497A priority Critical patent/JP6507471B2/en
Publication of JP2015152812A publication Critical patent/JP2015152812A/en
Application granted granted Critical
Publication of JP6507471B2 publication Critical patent/JP6507471B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/04Reversed telephoto objectives
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/18Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Description

The present invention relates to an optical system and an optical device .
  Conventionally, wide-angle lenses suitable for photographic cameras, electronic still cameras, video cameras and the like have been proposed (see, for example, Patent Document 1).
JP, 2009-109723, A
  However, the conventional wide-angle lens has a problem that aberration correction at the time of image stabilization is not sufficient when the image stabilizing mechanism is adopted.
  The present invention has been made in view of such problems, and it is an object of the present invention to provide an optical system and an optical apparatus in which aberrations during vibration reduction are sufficiently corrected.
In order to solve the above problems, the present invention is
An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
An optical system characterized by satisfying the following condition is provided.
0.23 <f / fvr <0.46
0.52 <(1−βvr) βr <0.70
1.20 <νP / νN <2.50
However,
f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group The lateral magnification PP of the composition of all the lenses: Abbe number NN of the biconvex positive lens: Abbe number of the negative meniscus lens
An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
An optical system characterized by satisfying the following condition is provided.
0.23 <f / fvr <0.46
0.52 <(1−βvr) βr <0.70
1.02 <nN / nP <1.40
However,
f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group Combined lateral magnification nN of all the lenses: refractive index nP of the negative meniscus lens: refractive index of the biconvex positive lens
An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
An optical system characterized by satisfying the following condition is provided.
0.256 ≦ f / fvr <0.46
0.52 <(1−βvr) βr <0.70
However,
f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group Combined lateral magnification of all lenses
  The present invention also provides an optical device comprising the above optical system.
  According to the present invention, it is possible to provide an optical system in which aberrations during vibration reduction are sufficiently corrected.
It is a figure showing lens composition of an optical system concerning the 1st example of this application. (A), (b), and (c) show various aberrations of the optical system according to the first embodiment at infinity, and blur is corrected for rotational blur at 0.60 °. 1 is a diagram showing a meridional lateral aberration of the lens and FIG. It is a figure which shows the lens structure of the optical system which concerns on 2nd Example of this application. 10A, 10B, and 10C show various aberrations of the optical system according to the second embodiment when focusing at infinity, and when shake correction is performed on a rotational shake of 0.60 °. 1 is a diagram showing a meridional lateral aberration of the lens and FIG. It is a figure which shows the lens structure of the optical system which concerns on 3rd Example of this application. 10A, 10B, and 10C show various aberrations of the optical system according to the third embodiment when focusing at infinity, and when shake correction is performed on a rotational shake of 0.60 °. 1 is a diagram showing a meridional lateral aberration of the lens and FIG. 2 is a diagram showing various aberrations at the time of close distance focusing. It is a figure which shows the lens structure of the optical system which concerns on 4th Example of this application. FIGS. 10A, 10B, and 10C show various aberrations of the optical system according to the fourth embodiment when focusing at infinity, and when shake correction is performed on a rotational shake of 0.60 °. 1 is a diagram showing a meridional lateral aberration of the lens and FIG. It is a figure which shows the lens structure of the optical system which concerns on 5th Example of this application. FIGS. 10A, 10B, and 10C show various aberrations of the optical system according to Example 5 when focused on infinity, and when shake correction is performed on a rotational shake of 0.60 °. 1 is a diagram showing a meridional lateral aberration of the lens and FIG. It is a figure which shows the structure of the camera provided with the optical system of this application. It is a figure which shows the outline of the manufacturing method of the optical system of this application.
  Hereinafter, an optical system, an optical apparatus, and a method of manufacturing a variable magnification optical system according to the present application will be described with reference to the drawings. The following embodiment is merely for the purpose of facilitating the understanding of the invention, and excludes addition, substitution and the like that can be implemented by those skilled in the art without departing from the technical concept of the present invention. It is not intended.
The optical system according to the present application is an optical system including, in order from the object side along the optical axis, a first lens group and a second lens group having a positive refractive power,
At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis.
  The optical system of the present application can be made smaller in size by forming the first lens group and the second lens group having positive refractive power sequentially from the object side along the optical axis, and each aberration Can be corrected well. Further, at the time of focusing from an infinite distance object point to a close distance object point, the first lens unit is fixed and the second lens unit is moved, whereby the lens barrel can be miniaturized and aberration fluctuation due to focusing Can be corrected well.
  Furthermore, by disposing the anti-vibration lens group in the first lens group, it is possible to realize good aberration correction at the time of correction of the imaging position displacement due to camera shake or the like.
Further, the optical system of the present application satisfies the following conditional expression (1), where f is the focal length of the entire system in an infinity in-focus condition and fvr is the focal length of the anti-vibration lens group. It is configured.
(1) 0.18 <f / fvr <0.46
  The conditional expression (1) defines the ratio of the focal length of the entire system in an infinity in-focus condition to the focal length of the anti-vibration lens unit. By satisfying the conditional expression (1), it is possible to realize good aberration correction at the time of correcting the imaging position displacement due to camera shake or the like.
  If the upper limit value of the conditional expression (1) is exceeded, the refractive power of the anti-vibration lens group becomes strong, and decentration aberration occurs when the anti-vibration lens group is decentered for correcting the imaging position displacement due to camera shake or the like. It becomes excessive. The effect of the present invention can be made more reliable by setting the upper limit value of conditional expression (1) to 0.38. Further, by setting the upper limit value of conditional expression (1) to 0.37, the effect of the present application can be made more reliable.
  On the other hand, if the lower limit value of the conditional expression (1) is not reached, the refractive power of the anti-vibration lens group becomes weak, and the shift amount of the anti-vibration lens group necessary for correcting the imaging position displacement due to camera shake becomes large. The core aberration becomes excessive. In addition, the lens barrel becomes large. The effect of the present invention can be made more reliable by setting the lower limit value of the conditional expression (1) to 0.23. Further, by setting the lower limit value of the conditional expression (1) to 0.24, the effect of the present invention can be made more reliable.
  With the above configuration, it is possible to realize an optical system in which the aberration at the time of image stabilization is sufficiently corrected.
In the optical system of the present application, when the lateral magnification of the anti-vibration lens group is βvr and the lateral magnification of the combination of all the lenses disposed on the image side of the anti-vibration lens group is βr, the following conditions It is desirable to satisfy Formula (2).
(2) 0.4 <(1-beta vr) beta r <0.8
  Conditional expression (2) defines the ratio of the amount of movement of the image on the image plane to the amount of movement of the anti-vibration lens unit at the time of correction of the imaging position displacement due to camera shake or the like. By satisfying this conditional expression (2), it is possible to realize good aberration correction at the time of correction of the imaging position displacement due to camera shake or the like.
  If the upper limit value of conditional expression (2) is exceeded, the refractive power of the anti-vibration lens group becomes strong, and decentration aberration occurs when the anti-vibration lens group is decentered for correcting the imaging position displacement due to camera shake or the like. It becomes excessive. The effect of the present invention can be made more reliable by setting the upper limit value of conditional expression (2) to 0.70. In addition, by setting the upper limit value of the conditional expression (2) to 0.65, the effect of the present application can be further ensured.
  On the other hand, below the lower limit value of the conditional expression (2), the shift amount of the anti-vibration lens group necessary for correcting the imaging position displacement due to camera shake or the like becomes large, and eccentric aberration becomes excessive. In addition, the lens barrel becomes large. In addition, the effect of this application can be made more reliable by setting the lower limit of conditional expression (2) to 0.50. Further, by setting the lower limit value of the conditional expression (2) to 0.52, the effect of the present invention can be made more reliable.
  Further, in the optical system of the present application, it is desirable that the anti-vibration lens group be composed of a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex positive lens. Thereby, good aberration correction can be realized at the time of correction of the imaging position displacement due to camera shake or the like.
In the optical system of the present application, it is preferable that the following conditional expression (3) be satisfied, where nN is the refractive index of the negative meniscus lens and nP is the refractive index of the biconvex positive lens.
(3) 1.00 <nN / nP <1.40
  Conditional expression (3) defines the ratio of the refractive index of the negative meniscus lens constituting the vibration reduction lens group to the refractive index of the biconvex positive lens. By satisfying the conditional expression (3), it is possible to realize good aberration correction at the time of correcting the imaging position displacement due to camera shake or the like.
  If the upper limit value of conditional expression (3) is exceeded, spherical aberration correction by the cemented surface will be excessive. Therefore, the decentration aberration at the time of decentering the anti-vibration group due to the imaging position displacement due to camera shake or the like becomes excessive, and the correction becomes difficult. By setting the upper limit value of conditional expression (3) to 1.35, the effects of the present application can be made more reliable. In addition, by setting the upper limit value of the conditional expression (3) to 1.32, the effect of the present application can be further ensured.
  On the other hand, if the corresponding value of the conditional expression (3) of the optical system of the present application falls below the lower limit value, spherical aberration correction by the cemented surface will be insufficient. Therefore, the decentration aberration at the time of decentering the anti-vibration group due to the imaging position displacement due to camera shake or the like becomes excessive, and the correction becomes difficult. The effect of the present invention can be made more reliable by setting the lower limit value of the conditional expression (3) to 1.02. Further, by setting the lower limit value of the conditional expression (3) to 1.04, the effect of the present invention can be made more reliable.
In the optical system of the present application, it is preferable that the following conditional expression (4) be satisfied, where ア ッ P is an Abbe number of the positive biconvex lens and NN is an Abbe number of the negative meniscus lens.
(4) 1.20 <νP / νN <2.50
  Conditional expression (4) defines the ratio of the Abbe number of the negative meniscus lens forming the vibration reduction lens group to the Abbe number of the biconvex positive lens. By satisfying the conditional expression (4), it is possible to realize good aberration correction at the time of correction of the imaging position displacement due to camera shake or the like.
  If the upper limit value of the conditional expression (4) is exceeded, chromatic aberration correction of the anti-vibration lens unit becomes excessive. Therefore, the chromatic aberration fluctuation when the anti-vibration group is decentered to correct the imaging position displacement due to camera shake or the like becomes excessive. The effect of the present invention can be made more reliable by setting the upper limit value of conditional expression (4) to 2.40. Further, by setting the upper limit value of the conditional expression (4) to 2.30, the effect of the present invention can be made more reliable.
  On the other hand, if the lower limit value of the conditional expression (4) is not reached, chromatic aberration correction of the anti-vibration lens group will be insufficient. Therefore, the chromatic aberration fluctuation when the anti-vibration group is decentered to correct the imaging position displacement due to camera shake or the like becomes excessive. The effect of the present invention can be made more reliable by setting the lower limit value of conditional expression (4) to 1.30. In addition, by setting the lower limit value of conditional expression (4) to 1.40, the effect of the present application can be made more reliable.
  In the optical system of the present application, it is preferable that the first lens group has at least two negative lenses on the object side relative to the vibration reduction lens group. By this configuration, coma, curvature of field, and distortion can be corrected well.
  In the optical system of the present application, it is preferable that the second lens group have at least one aspheric surface. Thereby, various aberrations can be corrected well.
  An optical apparatus according to the present invention is characterized by including the optical system having the above-described configuration. As a result, it is possible to realize an optical device in which the aberration at the time of image stabilization is sufficiently corrected.
The method of manufacturing an optical system according to the present application is a method of manufacturing an optical system having a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
At the time of focusing from an infinite object point to a near object point, the first lens group is fixed so that the second lens group moves.
The first lens group includes an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
Assuming that the focal length of the entire system in the infinity in-focus condition is f and the focal length of the vibration reduction lens unit is fvr, the following conditional expression (1) is satisfied.
(1) 0.18 <f / fvr <0.46
  Thus, it is possible to manufacture an optical system in which the aberration at the time of image stabilization is sufficiently corrected.
  Hereinafter, an optical system according to a numerical example of the present application will be described based on the attached drawings.
(First embodiment)
FIG. 1 is a view showing a lens configuration of an optical system according to a first example of the present application.
  The optical system according to the first embodiment includes a first lens group G1 having positive refractive power in order from the object side along the optical axis, and a second lens group G2 having positive refractive power. . The first lens group G1 is composed of, in order from the object side, a fixed lens portion G1F and a vibration reduction lens portion G1R. The fixed lens portion G1F includes, in order from the object side, a negative meniscus lens L11 having a convex surface facing the object side, a biconcave negative lens L12, and a positive meniscus lens L13 having a convex surface facing the object side. The vibration reduction lens portion G1R is composed of, in order from the object side, a positive cemented lens of a negative meniscus lens L14 having a convex surface facing the object side and a biconvex positive lens L15.
  The second lens group G2 includes, in order from the object side, a biconvex positive lens L21, a cemented negative lens of a positive meniscus lens L22 having a concave surface facing the object side and a biconcave negative lens L23, and an aperture stop S And a negative meniscus lens L24 having a concave surface facing the object side, a biconvex positive lens L25, and a positive meniscus lens L26 having a concave surface facing the object side. The positive meniscus lens L26 of the second lens group G2 includes an aspheric thin plastic resin layer on the object-side lens surface.
  In the optical system according to the present embodiment, focusing from the infinity object point to the near distance object point is performed by moving the second lens group G2 to the object side.
  Further, in the variable magnification optical system according to the present embodiment, the imaging position displacement due to camera shake or the like is corrected by moving the vibration reduction lens portion G1R in the direction including the direction component orthogonal to the optical axis.
  In order to correct rotational shake at an angle θ with a lens whose focal length of the entire system is f and whose image stabilization coefficient (image movement amount ratio on the image forming surface to movement amount of the moving lens group in shake correction) is K The moving lens group for blurring correction may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. In the first embodiment, since the vibration reduction coefficient is 0.540 and the focal length is 32.9 mm, the movement amount of the vibration reduction lens portion for correcting rotational shake of 0.60 ° is 0.64 mm. It is.
  Table 1 below presents values of specifications of the optical system according to the present example.
  In [Surface Data], “Surface number” is the order of the lens surfaces counted from the object side along the optical axis, “r” is the radius of curvature, “d” is the interval (the nth surface (n is an integer) “Nd” indicates the refractive index for the d-line (wavelength λ = 587.6 nm), and “νd” indicates the Abbe number for the d-line (wavelength λ = 587.6 nm). “Object plane” indicates the object plane, “variable” indicates the variable plane interval, “stop” indicates the aperture stop S, “BF” indicates back focus, and “image plane” indicates the image plane I. There is. In the radius of curvature “r”, “∞” indicates a plane, and the air refractive index nd = 1.00000 is omitted. Further, in the aspheric surface, the surface number is attached with “*”, and the paraxial radius of curvature is shown in the column of radius of curvature r.
[Spherical surface data] shows the aspheric surface coefficient and the conical constant when the shape of the aspheric surface shown in [Surface data] is expressed by the following equation.
x = (h 2 / r) / [1+ {1-κ (h / r) 2 } 1/2 ]
+ A4h 4 + A6h 6 + A8h 8 + A10h 10
Here, “x” is the distance along the optical axis direction from the tangent plane of the apex of each aspheric surface at height “h” in the vertical direction from the optical axis (sag amount), “κ” is a conical constant, “A4” , “A6”, “A8”, “A10” are aspheric coefficients, and “r” is the radius of curvature (paraxial radius of curvature) of the reference spherical surface. Moreover, "E-n" (n: integer) shows "x10- n ", for example, "1.234 E-05" shows "1.234 10-5 ".
  In [Various data], “f” is the focal length, “FNO” is the f-number, “ω” is the half angle of view (unit: “°”), “Ymax” is the maximum image height, “TL” Denotes the total length of the optical system (the distance on the optical axis from the first surface of the lens surface to the image plane I), and "Bf" denotes the back focus.
  In [variable interval data], "dn" indicates a variable surface interval between the nth surface and the (n + 1) th surface. “Infinity” indicates focusing on an infinite object point, and “short distance” indicates focusing on a short object point.
  [Lens group data] shows the starting surface of each lens group and the focal length f.
  [Conditional Expression Correspondence Value] shows the correspondence values of the conditional expressions of the photographing lens according to the present embodiment.
  Here, “mm” is generally used as the unit of focal length f and radius of curvature r listed in Table 1 and other lengths. However, the optical system is not limited to this because the same optical performance can be obtained by proportional enlargement or reduction.
  In addition, the code | symbol of Table 1 described above shall be similarly used also in the table | surface of each Example mentioned later.
[Table 1]
[Plane data]
Face number rd nd d d
Object ∞
1 99.9065 1.400 1.69680 55.52
2 28.2481 9.609
3-716.2904 1.400 1.51680 63.88
4 41.4223 8.594
5 44.6565 5.572 1.78472 25.64
6 156.9737 1.967
7 78.9513 1.400 1.71736 29.57
8 33.3421 9.200 1.51680 63.88
9 -69.3179 variable

10 35.7755 4.839 1.77250 49.62
11-351.1742 0.976
12-1789.3921 4.511 1.59319 67.90
13 -32.6424 1.500 1.60342 38.03
14 34.201 4.576
15 (F-stop) 8. 8.663
16-17.7599 2.839 1.69895 30.13
17-318.6183 0.150
18 140.9481 6.127 1.77250 49.62
19-24.8627 0.220
20 *-288.5410 0.150 1.55389 38.09
21 -141.2848 2.852 1.74100 52.77
22 -54.6674 BF
Image plane ∞

[Aspheric surface data]
Face 20
κ = 1.0000
A4 = -1.28440E-05
A6 = -6.18380 E-09
A8 = -4.00917E-11
A10 = 0.00000 E + 00

[Various data]
f 32.9
FNO 1.86
ω 33.90
Ymax 21.6
TL 124.35
BF 38.55

[Variable interval data]
Infinite distance
d9 9.257 8.160

[Lens group data]
Group front f
1 1 620.384
2 10 52.682

[Conditional expression corresponding value]
(1) f / fvr = 0.341
(2) (1- (beta) vr) (beta) r = 0.540
(3) nN / nP = 1.132
(4) PP / νN = 2.160
  FIGS. 2A, 2B, and 2C respectively show various aberrations when the optical system according to Example 1 was focused on infinity, and shake correction was performed on a rotational shake of 0.60 °. FIG. 6 is a diagram of a meridional lateral aberration at the time of focusing and various aberrations at the time of near distance focusing.
  In each of the aberration diagrams of FIG. 2, “FNO” indicates an F number, “NA” indicates a numerical aperture, and “Y” indicates an image height. In the spherical aberration diagram, the f-number or numerical aperture value corresponding to the maximum aperture is shown, in the astigmatism diagram and the distortion diagram, the maximum value of the image height is shown, and in the coma aberration diagram, the value of each image height is shown. . “D” represents d-line (wavelength λ = 587.6 nm), and “g” represents g-line (wavelength λ = 435.8 nm). In astigmatism diagrams, a solid line indicates a sagittal image plane, and a broken line indicates a meridional image plane. The same reference numerals as in this example are used also in the aberration diagrams of the examples below.
  From the various aberration diagrams, it can be seen that the optical system according to the present example has good optical performance, and the aberration at the time of vibration reduction is sufficiently corrected.
Second Embodiment
FIG. 3 is a view showing a lens configuration of an optical system according to a second example of the present application.
  The optical system according to this embodiment includes a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power in order from the object side.
  The first lens group G1 is composed of, in order from the object side, a fixed lens portion G1F and a vibration reduction lens portion G1R. The fixed lens portion G1F includes, in order from the object side, a negative meniscus lens L11 having a convex surface on the object side, a negative meniscus lens L12 having a convex surface on the object side, a negative biconcave lens L13, and a convex surface on the object side And a positive meniscus lens L14 facing the lens. The vibration reduction lens portion G1R is composed of, in order from the object side, a positive cemented lens of a negative meniscus lens L15 having a convex surface facing the object side and a biconvex positive lens L16.
  The second lens group G2 includes, in order from the object side, a biconvex positive lens L21, a cemented negative lens of a biconvex positive lens L22 and a biconcave negative lens L23, an aperture stop S, an object side The negative meniscus lens L24 with its concave surface facing, the biconvex positive lens L25, and the positive meniscus lens L26 with its concave surface facing the object side. The positive meniscus lens L26 of the second lens group G2 includes an aspheric thin plastic resin layer on the object-side lens surface.
  In the optical system according to the present embodiment, focusing from the infinity object point to the near distance object point is performed by moving the second lens group G2 to the object side.
  Further, in the variable magnification optical system according to the present embodiment, the imaging position displacement due to camera shake or the like is corrected by moving the vibration reduction lens portion G1R in the direction including the direction component orthogonal to the optical axis.
  In order to correct rotational shake at an angle θ with a lens whose focal length of the entire system is f and whose image stabilization coefficient (image movement amount ratio on the image forming surface to movement amount of the moving lens group in shake correction) is K The moving lens group for blurring correction may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. In the second embodiment, since the vibration reduction coefficient is 0.540 and the focal length is 28.80 mm, the movement amount of the vibration reduction lens portion for correcting rotational shake of 0.60 ° is 0.56 mm. It is.
  Table 2 below presents values of specifications of the variable magnification optical system according to the present example.
[Table 2]
[Plane data]
Face number rd nd d d
Object ∞
1 54.9332 1.400 1.69680 55.52
2 26.0323 7.750
3 81.9453 1.400 1.60311 60.69
4 29.9642 7.569
5-149.7994 1.400 1.51680 63.88
6 69.1421 4.300
7 46.4445 5.319 1.80518 25.45
8 396.9687 1.680
9 81.5953 1.400 1.68796 30.93
10 31.6045 8.131 1.51680 63.88
11 -62.5471 variable

12 32.8752 5.208 1.59655 61.62
13-255.1356 0.794
14 1272.6031 4.518 1.59319 67.90
15-31.2193 1.500 1.57501 41.51
16 39.8521 4.215
17 (aperture) 10. 10.104
18-16.0228 1.500 1.69895 30.13
19 -1536.5925 0.150
20 116.6326 6.610 1.77250 49.62
21-22.6008 0.220
22 * -647.9395 0.150 1.55389 38.23
23 -139.1259 3.099 1.74100 52.76
24-48.6617 BF
Image plane ∞

[Aspheric surface data]
22nd
κ = 1.0000
A4 = -1.48298E-05
A6 = -4.28365E-09
A8 = -7.80154E-11
A10 = 0.00000 E + 00

[Various data]
f 28.8
FNO 1.86
ω 37.48
Ymax 21.6
TL 124.35
BF 38.55

[Variable interval data]
Infinite distance
d11 7.384 6.425

[Lens group data]
Group front f
1 1-2152.267
2 12 48.441

[Conditional expression corresponding value]
(1) f / fvr = 0.320
(2) (1- (beta) vr) (beta) r = 0.540
(3) nN / nP = 1.113
(4) PP / νN = 2.065
  FIGS. 4A, 4B, and 4C show various aberrations of the optical system according to the second embodiment when focusing at infinity, and shake correction is performed on a rotational shake of 0.60 °. FIG. 6 is a diagram of a meridional lateral aberration at the time of focusing and various aberrations at the time of near distance focusing.
  From the various aberration diagrams, it can be seen that the optical system according to this example sufficiently corrects the optical performance and the aberration at the time of vibration reduction.
Third Embodiment
FIG. 5 is a view showing a lens configuration of an optical system according to a third example of the present application.
  The optical system according to this embodiment includes a first lens group G1 having positive refractive power and a second lens group G2 having positive refractive power in order from the object side.
  The first lens group G1 includes, in order from the object side along the optical axis, a fixed lens portion G1F, a vibration reduction lens portion G1R, and an aperture stop S. The fixed lens portion G1F includes, in order from the object side, a negative meniscus lens L11 having a convex surface on the object side, a negative meniscus lens L12 having a convex surface on the object side, and a negative meniscus lens L13 having a convex surface on the object side It consists of a cemented positive lens with a positive meniscus lens L14 having a convex surface directed to the side, and a cemented positive lens with a biconvex positive lens L15 and a biconcave negative lens L16. The negative meniscus lens L12 of the fixed lens portion G1F has an aspheric image side lens surface. The vibration reduction lens portion G1R is composed of, in order from the object side, a positive cemented lens of a negative meniscus lens L17 having a convex surface facing the object side and a biconvex positive lens L18.
  The second lens group G2 includes, in order from the object side along the optical axis, a negative cemented lens of a negative meniscus lens L21 having a concave surface on the object side and a positive meniscus lens L22 having a concave surface on the object side, and a biconvex shape And a positive meniscus lens L24 having a concave surface facing the object side. The positive meniscus lens L24 of the second lens group G2 includes an aspheric thin plastic resin layer on the object-side lens surface.
  In the optical system according to the present embodiment, focusing from the infinity object point to the near distance object point is performed by moving the second lens group G2 to the object side.
  Further, in the variable magnification optical system according to the present embodiment, the imaging position displacement due to camera shake or the like is corrected by moving the vibration reduction lens portion G1R in the direction including the direction component orthogonal to the optical axis.
  In order to correct rotational shake at an angle θ with a lens whose focal length of the entire system is f and whose image stabilization coefficient (image movement amount ratio on the image forming surface to movement amount of the moving lens group in shake correction) is K The moving lens group for blurring correction may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. In the third embodiment, since the vibration reduction coefficient is 0.608 and the focal length is 20.6 mm, the movement amount of the vibration reduction lens portion for correcting rotational shake of 0.60 ° is 0.36 mm. It is.
Table 3 below presents values of specifications of the variable magnification optical system according to the present example.
[Table 3]
[Plane data]
Face number rd nd d d
Object ∞
1 34.8374 1.400 1.69680 55.52
2 15.4247 7.297
3 25.0656 1.400 1.60311 60.69
4 * 11.7844 7.899
5 33.0463 1.400 1.6031 60.69
6 15.2763 6.090 1.64769 33.73
7 89.2603 1.904
8 24.5255 4.120 1.64769 33.73
9 -40.1996 1.400 1.75520 27.57
10 53.6245 3.826
11 45.9340 1.400 1.54814 45.79
12 13.0589 4.192 1.48749 70.31
13 -53.5049 1.782
14 (stop) ∞ variable

15-16.1257 1.500 1.75520 27.57
16-54.3245 1.936 1.60311 60.69
17 -40.2390 0.150
18 119.9487 4.611 1.59319 67.90
19-19.1271 0.220
20 *-51.0503 0.150 1.55 389 38.09
21-46.8729 2.434 1.60311 60.69
22-30.3759 BF
Image plane ∞

[Aspheric surface data]
Fourth side
κ = -0.1081
A4 = 2.34038E-05
A6 = -8.45920E-08
A8 = 2.07759E-10
A10 = -2.99723E-12
Face 20
κ = 1.0000
A4 = -3.05765E-05
A6 = -3. 30579E-08
A8 = -1.29755 E-10
A10 = 0.00000 E + 00

[Various data]
f 20.6
FNO 2.87
ω 47.00
Ymax 21.6
TL 100.35
BF 38.55

[Variable interval data]
Infinite distance
d14 6.690 5.954

[Lens group data]
Group front f
1 1 77.161
2 15 43.277

[Conditional expression corresponding value]
(1) f / fvr = 0.33
(2) (1-β vr) β r = 0.608
(3) nN / nP = 1.041
(4) P P / N N = 1.536
  FIGS. 6A, 6B, and 6C show various aberrations of the optical system according to the third embodiment when focusing at infinity, and shake correction is performed on a rotational shake of 0.60 °. FIG. 6 is a diagram of a meridional lateral aberration at the time of focusing and various aberrations at the time of near distance focusing.
  From the various aberration diagrams, it can be seen that the optical system according to this example sufficiently corrects the optical performance and the aberration at the time of vibration reduction.
Fourth Embodiment
FIG. 7 is a view showing a lens configuration of an optical system according to a fourth example of the present application.
  The optical system according to this embodiment includes a first lens group G1 having positive refractive power and a second lens group G2 having positive refractive power in order from the object side.
  The first lens group G1 includes, in order from the object side, a fixed lens portion G1F, a vibration reduction lens portion G1R, and an aperture stop S. The fixed lens portion G1F includes, in order from the object side, a negative meniscus lens L11 having a convex surface facing the object side, a negative meniscus lens L12 having a convex surface facing the object side, a biconvex positive lens L13 and a biconcave negative It consists of a cemented positive lens with the lens L14, and a positive meniscus lens L15 having a convex surface facing the object side. The negative meniscus lens L12 of the fixed lens portion G1F includes an aspheric thin plastic resin layer on the image side lens surface. The vibration reduction lens portion G1R is composed of, in order from the object side, a positive cemented lens of a negative meniscus lens L16 having a convex surface facing the object side and a biconvex positive lens L17.
  The second lens group G2 is composed of, in order from the object side, a negative meniscus lens L21 having a concave surface facing the object side, a biconvex positive lens L22, and a positive meniscus lens L23 having a concave surface facing the object side. The positive meniscus lens L23 of the second lens group G2 includes an aspheric thin plastic resin layer on the object-side lens surface.
  In the optical system according to the present embodiment, focusing from the infinity object point to the near distance object point is performed by moving the second lens group G2 to the object side.
  Further, in the variable magnification optical system according to the present embodiment, the imaging position displacement due to camera shake or the like is corrected by moving the vibration reduction lens portion G1R in the direction including the direction component orthogonal to the optical axis.
  In order to correct rotational shake at an angle θ with a lens whose focal length of the entire system is f and whose image stabilization coefficient (image movement amount ratio on the image forming surface to movement amount of the moving lens group in shake correction) is K The moving lens group for blurring correction may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. In the fourth embodiment, since the vibration reduction coefficient is 0.603 and the focal length is 20.6 mm, the movement amount of the vibration reduction lens portion for correcting rotational shake of 0.60 ° is 0.36 mm. It is.
Table 4 below presents values of specifications of the variable magnification optical system according to the present example.
[Table 4]
[Plane data]
Face number rd nd d d
Object ∞
1 42.0878 1.400 1.69680 55.52
2 16.6664 6.261
3 22.7835 1.400 1.60311 60.69
4 16.1337 0.150 1.51380 52.90
5 * 11.1174 8.502
6 50.1082 6.115 1.60342 38.03
7-30.8923 1.400 1.69680 55.52
8 212.6937 3.785
9 27.0364 3.576 1.74950 35.25
10 64.6074 6.110
11 47.8165 1.400 1.64769 33.73
12 17.1257 4.012 1.51680 63.88
13-58.8725 5.000
14 (stop) ∞ variable

15 -18.5444 1.500 1.75520 27.57
16-72.7583 0.150
17 79.4357 5.147 1.59319 67.90
18-21.4279 0.220
19 * -87.7280 0.150 1.51380 52.90
20-53.3 928 2. 492 1. 6031 60. 69
21 -32.8370 BF
Image plane ∞

[Aspheric surface data]
Fifth side
κ = -1.3593
A4 = 1.33091E-04
A6 = -5.41252E-07
A8 = 1.68424E-09
A10 = -4.48592E-12
Face 19
κ = 1.0000
A4 = -2.97717E-05
A6 = -1.75356E-08
A8 = -1.19355E-10
A10 = 0.00000 E + 00

[Various data]
f 20.6
FNO 2.86
ω 46.93
Ymax 21.6
TL 106.35
BF 38.55

[Variable interval data]
Infinite distance
d14 9.031 8.273

[Lens group data]
Group front f
1 1 65.083
2 15 48.665

[Conditional expression corresponding value]
(1) f / fvr = 0.299
(2) (1-.beta. Vr) .beta. R = 0.603
(3) nN / nP = 1.086
(4) PP / νN = 1.894
  FIGS. 8A, 8B, and 8C show various aberrations of the optical system according to the fourth example at infinity focus, and shake correction is performed on a rotational shake of 0.60 °. FIG. 6 is a diagram of a meridional lateral aberration at the time of focusing and various aberrations at the time of near distance focusing.
  From the various aberration diagrams, it can be seen that the optical system according to the present embodiment realizes good optical performance and sufficiently corrects the aberration at the time of vibration reduction.
Fifth Embodiment
FIG. 9 is a view showing a lens configuration of an optical system according to a sixth example of the present application.
  The optical system according to this embodiment includes a first lens group G1 having positive refractive power and a second lens group G2 having positive refractive power in order from the object side.
  The first lens group G1 is composed of, in order from the object side, a fixed lens portion G1F and a vibration reduction lens portion G1R. The fixed lens portion G1F includes, in order from the object side, a negative meniscus lens L11 having a convex surface on the object side, a negative meniscus lens L12 having a convex surface on the object side, a biconcave negative lens L13 and a biconvex positive shape. It consists of a cemented negative lens with the lens L14 and a biconvex positive lens L15. The negative meniscus lens L12 of the fixed lens portion G1F has an aspheric image side lens surface. The vibration reduction lens portion G1R is composed of, in order from the object side, a positive cemented lens of a negative meniscus lens L16 having a convex surface facing the object side and a biconvex positive lens L17.
  The second lens group G2 includes, in order from the object side, an aperture stop S, a cemented negative lens of a positive meniscus lens L21 having a concave surface facing the object side and a negative meniscus lens L22 having a concave surface facing the object side, and a biconvex shape And a biconcave negative lens L24 and a biconvex positive lens L25. The positive lens L25 of the second lens group G2 has an aspheric object side lens surface.
  In the optical system according to the present embodiment, focusing from the infinity object point to the near distance object point is performed by moving the second lens group G2 to the object side.
  Further, in the variable magnification optical system according to the present embodiment, the imaging position displacement due to camera shake or the like is corrected by moving the vibration reduction lens portion G1R in the direction including the direction component orthogonal to the optical axis.
  In order to correct rotational shake at an angle θ with a lens whose focal length of the entire system is f and whose image stabilization coefficient (image movement amount ratio on the image forming surface to movement amount of the moving lens group in shake correction) is K The moving lens group for blurring correction may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. In the fifth embodiment, since the vibration reduction coefficient is 0.600 and the focal length is 20.6 mm, the movement amount of the vibration reduction lens portion for correcting rotational shake of 0.60 ° is 0.36 mm. It is.
  Table 5 below presents values of specifications of the variable magnification optical system according to the present example.
[Table 5]
[Plane data]
Face number rd nd d d
Object ∞
1 32.74339 1.500 1.85026 32.35
2 17.6015 7.789
3 30.0000 1.500 1.9051 70.15
4 * 12.8066 13.237
5 -34.3108 1.500 1.55949 66.96
6 33.1003 7.382 1.56254 43.55
7 -46.9739 0.312
8 44.6338 4.100 1.66502 31.53
9-770.1867 3.000
10 50.6139 1.500 1.84129 35.07
11 26.4791 7.741 1.48749 70.32
12-52.4286 Variable

13 (F-stop) ∞ 2.700
14-144.5839 8.310 1.59319 67.90
15-15.7585 1.500 1.77797 42.76
16-685.6946 0.200
17 44.9232 6.636 1.59319 67.90
18-29.8687 0.200
19 -330.9757 1.500 1.74799 27.31
20 48.6495 1.674
21 * 162.3886 2.911 1.81787 45.45
22 -71.0825 BF
Image plane ∞

[Aspheric surface data]
Fourth side
κ = 0.0487
A4 = 1.59392E-05
A6 = -6.23871E-08
A8 = 2.88744E-10
A10 = -1.61608E-12
21st
κ = 1.0000
A4 = -1.11543E-05
A6 = -5.35451E-09
A8 = -7.61565E-11
A10 = 0.00000 E + 00

[Various data]
f 20.6
FNO 1.86
ω 46.99
Ymax 21.6
TL 127.01
BF 38.55

[Variable interval data]
Infinite distance
d12 13.263 12.508

[Lens group data]
Group front f
1 1 66.508
2 13 54.942

[Conditional expression corresponding value]
(1) f / fvr = 0.256
(2) (1- (beta) vr) (beta) r = 0.600
(3) nN / nP = 1.238
(4) PP / νN = 2.005
  FIGS. 10A, 10B, and 10C show various aberrations of the optical system according to the fifth example at infinity, and shake correction is performed on a rotational shake of 0.60 °. FIG. 6 is a diagram of a meridional lateral aberration at the time of focusing and various aberrations at the time of near distance focusing.
  From the various aberration diagrams, it can be seen that the optical system according to this example sufficiently corrects the optical performance and the aberration at the time of vibration reduction.
  According to each of the above embodiments, it is possible to realize an optical system in which the aberration at the time of image stabilization is sufficiently corrected.
  The above-described embodiments show one specific example of the present invention, and the present invention is not limited thereto. The following contents can be suitably adopted within the range that does not impair the optical performance of the optical system of the present application.
  Although a two-group configuration is shown as a numerical example of the optical system of the present application, the present application is not limited to this, and an optical system of other group configurations (for example, three-group, four-group, etc.) can be configured. Specifically, a lens or lens group may be added to the most object side or the most image plane side of the optical system of the present invention. The lens group indicates a portion having at least one lens separated by an air gap that changes at the time of zooming.
  Further, in the imaging lens of the present application, a part of the lens group, the whole of one lens group, or a plurality of lens groups is used as a focusing lens group to perform focusing from an infinite distance object point to a close distance object point. It may be configured to move in the optical axis direction. In particular, it is preferable to set at least a part of the first lens group as a focusing lens group. Further, such a focusing lens group can also be applied to auto focusing, and is also suitable for driving by a motor for auto focusing such as an ultrasonic motor.
  Further, in the photographing lens of the present application, a shake detection system for detecting a shake of the lens system and a driving means are combined with the lens system, and any or all of the lens groups are made as a vibration reduction lens group with respect to the optical axis. It is also possible to correct an image blur caused by a camera shake or the like by moving so as to include a component in the vertical direction, or by rotating (swinging) in the in-plane direction including the optical axis.
  Further, the lens surface of the lens constituting the optical system of the present invention may be a spherical surface, a flat surface, or an aspheric surface. When the lens surface is spherical or flat, it is preferable because lens processing and assembly adjustment can be facilitated, and deterioration of optical performance due to lens processing and assembly adjustment errors can be prevented. In addition, even when the image plane shifts, it is preferable because the deterioration of the imaging performance is small. When the lens surface is aspheric, any of aspheric aspheric surfaces by grinding, a glass mold aspheric surface formed by shaping a glass into aspheric surface shape, or a composite aspheric surface formed by forming a resin on a glass surface into an aspheric surface shape Good. The lens surface may be a diffractive surface, and the lens may be a gradient index lens (GRIN lens) or a plastic lens.
  In addition, an antireflective film having high transmittance over a wide wavelength range may be provided on the lens surface of the lens constituting the optical system of the present application. This can reduce flare and ghost and achieve high contrast and high optical performance.
Next, a camera provided with the optical system of the present invention will be described based on FIG. FIG. 11 is a diagram showing the configuration of a camera provided with the optical system of the present invention.
The present camera 1 is a so-called mirrorless camera of an interchangeable lens type provided with the variable magnification optical system according to the first embodiment as the photographing lens 2 as shown in FIG.
  In the present camera 1, light from an object (not shown) from the object (not shown) is collected by the photographing lens 2, and is taken on the imaging surface of the photographing unit 3 via the OLPF (optical low pass filter). Form an image of the subject. Then, the subject image is photoelectrically converted by the photoelectric conversion element provided in the photographing unit 3 to generate the image of the subject. This image is displayed on an EVF (Electronic view finder) 4 provided in the camera 1. Thereby, the photographer can observe the subject via the EVF 4.
  Further, when the photographer presses a release button (not shown), the image photoelectrically converted by the photographing unit 3 is stored in a memory (not shown). In this way, the photographer can shoot a subject with the main camera 1.
  The optical system according to the first embodiment sufficiently corrects the aberration at the time of vibration reduction. Therefore, the present camera 1 mounted with the optical system according to the first embodiment as the photographing lens 2 can realize high-performance photographing with the aberration at the time of vibration reduction sufficiently corrected. Even if a camera is mounted with the optical system according to the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment as the photographing lens 2, the same effect as the camera 1 can be obtained. Can play.
  Hereinafter, an outline of a method of manufacturing an optical system according to the present application will be described based on FIG.
The method of manufacturing an optical system of the present application shown in FIG. 12 is a method of manufacturing an optical system having a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis. , And the following steps S1 to S3.
Step 1: In focusing from an infinite object point to a near object point, the first lens group is fixed so that the second lens group is moved.
Step 2: The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis in order to correct an imaging position displacement due to a camera shake or the like.
Step 3: Let f be the focal length of the entire system in an infinity in-focus condition, and fvr be the focal length of the anti-vibration lens unit so as to satisfy the following conditional expression (1).
(1) 0.18 <f / fvr <0.46
  According to the above manufacturing method, it is possible to manufacture an optical system in which the aberration at the time of vibration reduction is sufficiently corrected.
G1 1st lens group
G2 Second lens group
G1F Fixed lens portion in first lens group G1R Anti-vibration lens portion I in first lens group Image plane
S aperture stop
1 camera 2 shooting lens 3 shooting unit 4 EVF

Claims (8)

  1. An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
    At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
    The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
    The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
    An optical system characterized by satisfying the following conditional expression.
    0.23 <f / fvr <0.46
    0.52 <(1−βvr) βr <0.70
    1.20 <νP / νN <2.50
    However,
    f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group Lateral magnification PP of the composition of all the lenses: Abbe number NN of the biconvex positive lens: Abbe number of the negative meniscus lens
  2. An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
    At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
    The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
    The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
    An optical system characterized by satisfying the following conditional expression.
    0.23 <f / fvr <0.46
    0.52 <(1−βvr) βr <0.70
    1.02 <nN / nP <1.40
    However,
    f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group Composite lateral magnification nN of all lenses: refractive index nP of the negative meniscus lens: refractive index of the biconvex positive lens
  3. An optical system comprising substantially two lens groups of a first lens group and a second lens group having positive refractive power in order from the object side along the optical axis,
    At the time of focusing from an infinity object point to a near distance object point, the first lens group is fixed and the second lens group is moved,
    The first lens group has an anti-vibration lens group movable in a direction including a direction component orthogonal to the optical axis,
    The anti-vibration lens group comprises a cemented lens of a negative meniscus lens convex on its object side and a positive biconvex lens.
    An optical system characterized by satisfying the following conditional expression.
    0.256 ≦ f / fvr <0.46
    0.52 <(1−βvr) βr <0.70
    However,
    f: focal length fvr of the whole system in an infinity in-focus condition: focal length βvr of the anti-vibration lens group: lateral magnification βr of the anti-vibration lens group: disposed closer to the image than the anti-vibration lens group Combined lateral magnification of all lenses
  4. The optical system according to claim 1 or 3, which satisfies the following conditional expression.
    1.00 <nN / nP <1.40
    However,
    nN: refractive index of the negative meniscus lens nP: refractive index of the biconvex positive lens
  5. The optical system according to claim 3, wherein the following conditional expression is satisfied.
    1.20 <νP / νN <2.50
    However,
    PP: Abbe number of the biconvex positive lens NN: Abbe number of the negative meniscus lens
  6.   The optical system according to any one of claims 1 to 5, wherein the first lens group has at least two negative lenses on the object side of the vibration reduction lens group.
  7.   The optical system according to any one of claims 1 to 6, wherein the second lens group has at least one aspheric surface.
  8.   An optical apparatus comprising the optical system according to any one of claims 1 to 7.
JP2014027497A 2014-02-17 2014-02-17 Optical system and optical device Active JP6507471B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014027497A JP6507471B2 (en) 2014-02-17 2014-02-17 Optical system and optical device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014027497A JP6507471B2 (en) 2014-02-17 2014-02-17 Optical system and optical device
PCT/JP2015/053386 WO2015122368A1 (en) 2014-02-17 2015-02-06 Optical system, optical device, and method for producing optical system

Publications (2)

Publication Number Publication Date
JP2015152812A JP2015152812A (en) 2015-08-24
JP6507471B2 true JP6507471B2 (en) 2019-05-08

Family

ID=53800115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014027497A Active JP6507471B2 (en) 2014-02-17 2014-02-17 Optical system and optical device

Country Status (2)

Country Link
JP (1) JP6507471B2 (en)
WO (1) WO2015122368A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017142296A (en) * 2016-02-08 2017-08-17 富士フイルム株式会社 Imaging lens and imaging device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4862263B2 (en) * 2004-03-31 2012-01-25 株式会社ニコン Super wide-angle lens and photographing apparatus equipped with the super-wide angle lens
JP4950645B2 (en) * 2006-12-07 2012-06-13 キヤノン株式会社 Optical system and imaging apparatus having the same
JP5170616B2 (en) * 2007-04-23 2013-03-27 株式会社ニコン Wide angle lens, imaging device, and focusing method of wide angle lens
JP5262281B2 (en) * 2008-05-14 2013-08-14 株式会社ニコン Wide-angle lens and imaging device
JP5395700B2 (en) * 2010-02-19 2014-01-22 株式会社シグマ Large aperture medium telephoto lens
JP5691855B2 (en) * 2010-06-23 2015-04-01 株式会社ニコン Photographic lens, optical apparatus having the photographic lens, and method of manufacturing the photographic lens
JP5561256B2 (en) * 2011-08-09 2014-07-30 株式会社ニコン OPTICAL SYSTEM, OPTICAL DEVICE HAVING THE OPTICAL SYSTEM, AND METHOD FOR PRODUCING OPTICAL SYSTEM
JP5440810B2 (en) * 2011-10-07 2014-03-12 株式会社ニコン Optical system, optical device
JP5924172B2 (en) * 2012-07-19 2016-05-25 株式会社ニコン OPTICAL SYSTEM, OPTICAL DEVICE, AND OPTICAL SYSTEM MANUFACTURING METHOD

Also Published As

Publication number Publication date
WO2015122368A1 (en) 2015-08-20
JP2015152812A (en) 2015-08-24

Similar Documents

Publication Publication Date Title
JP5309553B2 (en) Zoom lens and optical apparatus provided with the zoom lens
JP5594607B2 (en) Zoom lens and imaging device
CN107850763B (en) Variable magnification optical system and optical device
JP5115065B2 (en) Zoom lens, optical equipment, zoom lens zooming method
JP5557092B2 (en) Zoom lens, optical device, and method of manufacturing zoom lens
JP5333906B2 (en) Zoom lens and optical equipment
CN109031630B (en) Variable magnification optical system and imaging device
JP5403315B2 (en) Zoom lens system and optical apparatus provided with the zoom lens system
JP5510784B2 (en) Zoom lens, optical equipment
JP5344322B2 (en) Zoom lens and optical equipment
JP6299261B2 (en) Optical system and optical apparatus
JP5668409B2 (en) Zoom lens and optical equipment
JP5906759B2 (en) Zoom lens, optical device, and method of manufacturing zoom lens
JP5510114B2 (en) Zoom lens, imaging device, and zoom lens manufacturing method
JP5532402B2 (en) Zoom lens and optical equipment
JP6507471B2 (en) Optical system and optical device
CN107850762B (en) Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system
JP5594606B2 (en) Zoom lens and imaging device
JP5212813B2 (en) Zoom lens, optical device including the same, and manufacturing method
JP5386868B2 (en) Zoom lens, optical equipment
JP6197489B2 (en) Variable-magnification optical system, optical device, and variable-magnification optical system manufacturing method
WO2014192288A1 (en) Zoom lens, optical device and method for manufacturing zoom lens
JP5115870B2 (en) Zoom lens, optical device, and method of manufacturing zoom lens
JP5252287B2 (en) Zoom lens and optical equipment
JP5434006B2 (en) Zoom lens, image pickup apparatus, and zooming method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170110

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20171024

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20171219

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180220

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20180220

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180731

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180914

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190305

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190318

R150 Certificate of patent or registration of utility model

Ref document number: 6507471

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150