WO2007113952A1 - 撮像装置、撮像方法、高変倍ズームレンズ - Google Patents
撮像装置、撮像方法、高変倍ズームレンズ Download PDFInfo
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- WO2007113952A1 WO2007113952A1 PCT/JP2007/053696 JP2007053696W WO2007113952A1 WO 2007113952 A1 WO2007113952 A1 WO 2007113952A1 JP 2007053696 W JP2007053696 W JP 2007053696W WO 2007113952 A1 WO2007113952 A1 WO 2007113952A1
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- lens
- lens group
- zoom lens
- end state
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1451—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive
- G02B15/145129—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive arranged +-+++
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
Definitions
- the present invention relates to an imaging device, an imaging method, and a high-magnification zoom lens. Background art
- an image pickup apparatus configured to read out image information within a predetermined image frame as an object image from image information obtained by a solid-state image pickup device, and when zooming with a zoom lens, In order to correct the variation in the position of the object image that occurs, a configuration has been proposed in which the reading position of the predetermined image frame is appropriately changed in accordance with the variation (for example, Japanese Patent Laid-Open No. 5-3 7 8 4 9). Issue no.).
- an imaging apparatus having a configuration in which the solid-state imaging device itself is moved in the optical axis direction has been proposed in order to correct the fluctuation of the position of the object image in the optical axis direction that occurs during zooming with a zoom lens (for example, (See Japanese Laid-Open Patent Publication No. 6-3 3 0 5 4).
- the imaging device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 5-378088 reads out image information in a predetermined image frame as an object image from the image information obtained in the solid-state imaging device as described above. Due to the configuration, there was a problem that the effective pixels of the solid-state image sensor could not be used efficiently.
- the image pickup apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-339045 can efficiently use the effective pixels of the solid-state image pickup device, but the solid-state image pickup device in the optical axis direction. If an attempt was made to correct the change in the position of the object image that occurred when the object was moved, the object image had a problem that the amount of light was uneven at the periphery of the screen. Disclosure of the invention
- An object of the present invention is to provide an imaging device, an imaging method, and a high-magnification zoom lens that can be used well and can maintain the ratio of the peripheral light quantity of a photographed image even when power and vibration are prevented. .
- the first aspect of the present invention includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group.
- a fourth lens group and a fifth lens group, and at the time of zooming from the wide-angle end state to the telephoto end state, the first lens group, the second lens group, the third lens group, and the fourth lens group A high-magnification zoom lens that moves a lens group along an optical axis, a solid-state imaging device that images an object image formed by the high-magnification zoom lens, and a detection unit that detects a change in the position of the object image
- Driving means for moving the solid-state imaging device in a direction substantially perpendicular to the optical axis; and control means for controlling the driving means to correct a variation in the position of the object image.
- the first lens in the high-magnification zoom lens In order to limit the luminous flux incident on the outermost part of the lens on the most object side in the lens group, it is equipped with a light-shielding means with an opening and satisfies the following conditional expression (1):
- An imaging device is provided.
- Ah t Maximum amount of movement of the solid-state imaging device in the telephoto end state
- the second aspect of the present invention detects a change in the position of the object image when the object image formed by the high-magnification zoom lens is picked up by the solid-state imaging device, and changes the position of the object image.
- the high-magnification zoom lens includes a first lens group having a positive refractive power in order from the object side.
- a h t Maximum moving amount of the solid-state imaging device in the telephoto end state
- the third aspect of the present invention detects a change in the position of the object image and corrects the change in the position of the object image when the object image formed by the photographing lens is imaged by a solid-state imaging device. Therefore, an imaging apparatus configured to move the solid-state imaging device in a direction substantially perpendicular to the optical axis is a high-magnification zoom lens used as the photographing lens, and has a positive refractive power in order from the object side.
- the first lens group and the first lens group 2 to move the lens group, the third lens group, and the fourth lens group along the optical axis, and further to limit the light beam incident on the outer peripheral portion of the lens closest to the object in the first lens group
- the present invention provides a high-magnification zoom lens that includes a light-shielding means having an opening and satisfies the following conditional expression (1).
- a h t Maximum moving amount of the solid-state imaging device in the telephoto end state
- L Optical total length of the high-magnification zoom lens in the wide-angle end state.
- image stabilization is performed by moving the solid-state image sensor in a direction substantially perpendicular to the optical axis, and effective pixels in the solid-state image sensor can be used efficiently. It is possible to provide an imaging apparatus, an imaging method, and a high-magnification zoom lens capable of maintaining a good ratio of the peripheral light amounts.
- FIG. 1 is a diagram illustrating a configuration of an imaging apparatus according to the first embodiment of the present application.
- FIG. 2 is a diagram illustrating the configuration of the high zoom lens and the state of movement of the solid-state image sensor in the imaging apparatus according to the first embodiment of the present application.
- FIG. 3 shows a lens configuration at the time of focusing at infinity in the wide-angle end state W, the intermediate focal length state M, and the telephoto end state T of the high-magnification zoom lens in the image pickup apparatus according to the first embodiment of the present application.
- FIGS. 4A, 4B, and 4C are diagrams illustrating a specific configuration of the light shielding unit in the imaging apparatus according to the first embodiment of the present application.
- FIG. 6A, 6B, and 6C are graphs showing various aberrations of the high-magnification zoom lens according to Example 1 when focusing at infinity, FIG. 6A is a wide-angle end state, and FIG. 6B is an intermediate focal length state. Figure 6C shows the telephoto end state.
- FIG. 7A, 7B, and 7C are graphs showing various aberrations when the close-up focus of the high-magnification zoom lens according to Example 1 is in focus
- FIG. 8 shows a lens configuration at the time of focusing at infinity in the wide-angle end state W, the intermediate focal length state M, and the telephoto end state T of the high-magnification zoom lens in the imaging apparatus according to the second embodiment of the present application.
- FIGS. 10A, 10B, and 10C are graphs showing various aberrations of the high-magnification zoom lens according to Example 2 when focusing at infinity.
- FIG. 1 OA is a wide-angle end state
- FIG. 10C is a diagram in the telephoto end state, in the focal length state.
- Fig. 1 1A, 1 1B, 11 C are diagrams showing various aberrations when focusing at close range of the high zoom lens according to the second example.
- the imaging device of the present application includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a positive bending.
- a fourth lens group having a folding power and a fifth lens group having a positive refractive power, and at the time of zooming from the wide-angle end state to the telephoto end state, the first lens group and the second lens A high-magnification zoom lens that moves a group, the third lens group, and the fourth lens group along an optical axis; a solid-state imaging device that images an object image formed by the high-magnification zoom lens; Detecting means for detecting a change in the position of the object image; a driving means for moving the solid-state imaging element in a direction substantially perpendicular to an optical axis; and the correction means for correcting the change in the position of the object image.
- Control means for controlling the drive means, and further, the high zoom ratio In order to restrict the light beam incident on the outermost portion of the lens on the most object side in the first lens group in the first lens group, a light shielding means having an aperture is provided, and the following conditional expression (1) is satisfied It is configured as follows.
- ⁇ 1 Diameter of the opening in the light shielding means
- a h t Maximum moving amount of the solid-state imaging device in the telephoto end state
- the effect of the present application can be further exerted.
- Conditional expression (1) is a conditional expression that regulates the size of the diameter of the opening in the light shielding means.
- conditional expression (1) If the lower limit of conditional expression (1) is not reached, coma in the periphery of the screen will increase. This is not preferable. If the lower limit value of conditional expression (1) is set to 0.15, the effect of the present application can be further exerted.
- conditional expression (1) if the upper limit of conditional expression (1) is exceeded, the amount of light at the periphery of the screen becomes non-uniform.
- the maximum movement amount (anti-vibration correction amount) of the solid-state image pickup device in the telephoto end state is not preferable because the image plane fluctuation increases when the force is maximum, and the fluctuation of the field curvature occurs. If the upper limit value of conditional expression (1) is set to 1 ⁇ 50, the effect of the present application can be further exerted.
- the opening in the light shielding unit is a circular opening.
- the inner diameter of the circular opening is ⁇ 1 in the above conditional expression (1).
- the opening in the light shielding unit is a rectangular opening formed corresponding to the solid-state imaging element.
- the shape of the opening in the light shielding means can be made to be a shape obtained by projecting the outer shape of the effective pixel of the solid-state imaging device onto the lens surface closest to the object in the first lens. This makes it possible to more effectively prevent stray light from entering the high-magnification zoom lens.
- the diagonal length of the rectangular opening is ⁇ 1 in the conditional expression (1).
- the imaging apparatus of the present application satisfies the following conditional expression (2).
- (2) 0 1 10 (f wxAh t) / (f txAh w) ⁇ 1.0
- a h t Maximum moving amount of the solid-state imaging device in the telephoto end state
- Conditional expression (2) is a conditional expression that defines an appropriate range of the focal length of the high-magnification zoom lens and the maximum movement amount of the solid-state imaging device.
- Exceeding the upper limit value of conditional expression (2) is not preferable because the image plane variation increases when the maximum amount of movement of the solid-state imaging device in the telephoto end state is maximum, and the field curvature also varies. If the upper limit value of conditional expression (2) is set to 0.9, the effect of the present application can be further exerted.
- conditional expression (2) On the other hand, if the lower limit of conditional expression (2) is not reached, the effective diameter of the lens closest to the object side in the first lens group becomes too large, which is not preferable. Also, if the effective diameter of this lens is to be kept small, the refractive power of the third lens group must be increased, and as a result, coma aberration increases, which is not preferable. If the lower limit value of conditional expression (2) is set to 0.2, the effect of the present application can be further exerted.
- the light shielding unit is formed by applying a light shielding paint to a lens surface closest to the object in the first lens group in the high variable magnification zoom lens.
- the diameter of the opening of the light shielding means can be reduced, and further increased.
- the number of assembly parts of the zoom lens can be reduced, and the cost can be reduced.
- the light shielding unit is a plate-like member disposed in contact with the lens surface closest to the object in the first lens group in the high variable magnification zoom lens. . .
- the “plate-like member” includes a sheet-like member having a small thickness.
- the light shielding unit includes a lens fixing unit for fixing a lens closest to the object side in the first lens group in the high variable magnification zoom lens. It is desirable to be provided integrally with the material.
- annular fixing member for screwing and fixing the most object-side lens in the first lens group to the lens barrel can be used as the light shielding means, thus simplifying the high-magnification zoom lens. This reduces the number of assembly parts. .
- the high zoom lens performs forcing by moving the fifth lens group in the optical axis direction.
- the driving mechanism can be simplified by adopting a configuration in which focusing is performed by the fifth lens group that does not move during zooming.
- the fourth lens group in the high-magnification zoom lens has positive refraction in order from the object side. It is preferably composed of a front group having power and a rear group having negative refractive power, and it is preferable that the following conditional expression (3) is satisfied. '
- f 4 F Focal length of the front group in the fourth lens group in the high-magnification zoom lens
- Conditional expression (3) is a conditional expression that defines an appropriate range of the focal lengths of the front group and the rear group constituting the fourth lens group. .
- conditional expression (3) If the upper limit of conditional expression (3) is exceeded, inward coma will occur in the intermediate focal length state, which is not preferable. If the upper limit value of conditional expression (3) is set to 1.25, the occurrence of introverted coma aberration can be more effectively suppressed in the intermediate focal length state, and the effects of the present application can be further exhibited. On the other hand, if the lower limit value of conditional expression (3) is not reached, the diameter of the opening of the light shielding means increases, which is not preferable. If the lower limit value of conditional expression (3) is set to 1.40, the effect of the present application can be further exerted.
- the imaging method of the present application detects a change in the position of the object image and corrects the change in the position of the object image when the object image formed by the high-magnification zoom lens is picked up by the solid-state imaging device.
- the high-magnification zoom lens includes, in order from the object side, a first lens group having a positive refractive power, and a negative refractive power.
- image stabilization is achieved by moving the solid-state image sensor in a direction substantially perpendicular to the optical axis, and the effective pixels in the solid-state image sensor can be used efficiently. It is possible to realize an imaging method capable of maintaining the peripheral light amount ratio of the image.
- the high-magnification zoom lens of the present application fixes an object image formed by the taking lens.
- a variation in the position of the object image is detected, and the solid-state image sensor is moved in a direction substantially perpendicular to the optical axis to correct the variation in the position of the object image.
- a high-magnification zoom lens used as the photographing lens, in order from the object side, a first lens group having a positive refractive power, and a second lens group having a negative bending ⁇ folding force
- a third lens group, a fourth lens group, and a fifth lens group and at the time of zooming from the wide-angle end state to the telephoto end state, the first lens group, the second lens group, and the first lens group
- An aperture is provided to move the three lens groups and the fourth lens group along the optical axis, and to limit the light beam incident on the outermost portion of the lens closest to the object in the first lens group. Which satisfies the following conditional expression 0 (1) .
- Ah t Maximum amount of movement of the solid-state imaging device in the telephoto end state
- image stabilization is achieved by moving the solid-state image sensor in a direction substantially perpendicular to the optical axis, and the effective pixels in the solid-state image sensor can be used efficiently. It is possible to realize a high zoom ratio zoom lens capable of maintaining a good ratio of the amount of light in the periphery. .
- FIG. 1 is a diagram illustrating a configuration of an imaging apparatus according to the first embodiment of the present application.
- the imaging apparatus 1 has a high zoom ratio which will be described later as a photographic lens.
- Digital SLR camera with 2
- the imaging apparatus 1 In the imaging apparatus 1, light from an object (object) (not shown) is condensed by the high zoom ratio zoom lens 2 and focused on the focusing screen 4 via the quick mirror 3. The light imaged on the focusing screen 4 is reflected a plurality of times in the pen prism 5 and guided to the eyepiece 6. Thus, the photographer can observe the object image as an erect image through the eyepiece 6.
- the quick return mirror 3 is retracted out of the optical path, and the light from the object (not shown) reaches the solid-state image sensor 7. Thereby, light from the object is imaged by the solid-state imaging device 7 and recorded in the memory 8 as an object image. In this way, the photographer can take an image of the object with the imaging apparatus 1.
- the imaging device 1 includes an image generated due to camera shake or the like of the user of the imaging device 1.
- a shake detection sensor 9 for detecting a shake that is, a change in the position of the object image
- Control means 11 for controlling each part of the imaging apparatus 1 including the drive means 10 for correction is provided.
- the control means 11 controls the drive means 10 to move the solid-state imaging device 7 in a direction substantially perpendicular to the optical axis. This makes it possible to correct fluctuations in the position of the object image. In this way, image stabilization in the imaging apparatus 1 is realized, and shooting failures due to image blur can be prevented.
- FIG. 2 is a diagram illustrating the configuration of the high zoom lens and the state of movement of the solid-state image sensor in the image pickup apparatus according to the first embodiment of the present application.
- FIG. 3 is a diagram showing a lens configuration at the time of focusing at infinity in the wide-angle end state W, the intermediate focal length state M, and the telephoto end state T of the high-magnification zoom lens in the imaging apparatus according to the first embodiment of the present application. It is.
- the zoom lens according to the present embodiment includes, in order from the object side, a first lens group G 1 having a positive refractive power, a second lens group G 2 having a negative refractive power, an aperture stop S, A third lens group G 3 having a positive refractive power, a fourth lens group G 4 having a positive refractive power, a fifth lens group G 5 having a positive refractive power, an optical low-pass filter LF, It consists of the cover glass CG of the solid-state image sensor 7. '
- the first lens group G 1 includes, in order from the object side, a cemented positive lens of a negative meniscus lens L 1 1 having a convex surface facing the object side and a positive meniscus lens L 1 2 having a convex surface facing the object side, and the object side And a positive meniscus lens L 1 3 with a convex surface facing to.
- the second lens group G 2 is composed of a negative meniscus lens L 21 having a convex surface facing the object side, a biconcave negative lens L 22 and a biconvex positive lens L 23 in order from the object side. It consists of a negative lens.
- the third lens group G 3 is composed of, in order from the object side, a biconvex positive lens L 3 1 and a negative meniscus lens L 3 2 with a concave surface facing the object side.
- the fourth lens group G 4 includes, in order from the object side, a front group G 4 F having a positive refractive power and a rear group G 4 R having a negative refractive power.
- the front group G 4 F is composed of a biconvex positive lens L 4 1 whose image side lens surface is aspheric, and the rear group G 4 R is a biconvex positive lens in order from the object side. It consists of a cemented negative lens of L 4 2 and a biconcave negative lens L 4 3.
- the fifth lens group G 5 is composed of a positive meniscus lens L 51 having a convex surface directed toward the object side.
- the first lens group G1 moved to the object side, and the second lens group G2 once moved to the image side. Later move to the object side (moves to the object side with a concave movement trajectory), and the third lens group G 3 moves to the object side, and the fourth lens group G 4 moves to the object side.
- the aperture stop S moves integrally with the third lens group G3.
- the fixed fifth lens group G5 moves to the object side at the time of zooming when forcing from an object at infinity to a close object.
- the lens side near the object side lens surface of the negative meniscus lens L 11 that is the most object side lens in the first lens group G 1 is incident on the outer peripheral portion of the lens surface.
- a light shielding means FS having a circular opening O is provided.
- the opening 0 in the light shielding member F S is formed such that its inner diameter ⁇ 1 is larger than the effective diameter ⁇ 0 of the negative meniscus lens L 11 and satisfies the conditional expression (1).
- the light shielding means FS in the present embodiment shields light so as to form a circular opening O having an inner diameter of ⁇ 1 in the outer peripheral portion of the object side lens surface of the negative meniscus lens L 11. It consists of applying paint P.
- the mode of the light shielding unit F S is not limited to this, and the configuration shown in FIG. 4B or FIG. 4C may be employed.
- the solid-state imaging device is disposed inside the lens barrel 2a that supports the high-magnification zoom lens and is in contact with the object-side lens surface of the negative meniscus lens L11.
- a plate-shaped light shielding member Q having a rectangular opening obtained by projecting the outer shape of the effective pixel 7 onto the lens surface can also be disposed as the light shielding means FS. This can more effectively prevent stray light from entering the zoom lens.
- an annular member R (so-called presser ring) that is screwed and fixed to the lens barrel 2a to fix the position of the negative meniscus lens L11 in the optical axis direction is fixed. By setting the inner diameter to ⁇ 1, the annular member R can also serve as the light shielding means FS.
- Such an annular member R has a high holding ability and is suitable for a large-aperture lens.
- Table 1 below shows values of specifications of the high variable magnification zoom lens in the present example.
- f is the focal length
- FNO is the F number
- ⁇ 0 is the effective diameter of the negative meniscus lens L 11
- ⁇ 1 is the inner diameter of the aperture ⁇ of the light shielding means FS (the negative meniscus lens LI 1 during image stabilization)
- IH is the length from the center of the solid-state image sensor 7 to the diagonal
- L is the optical total length of the high-magnification zoom lens in the corner end state
- Ahw is the maximum movement amount of the solid-state image sensor 7 in the wide-angle end state
- Ah t Indicates the maximum amount of movement of the solid-state imaging device 7 in the telephoto end state.
- En means “ ⁇ 1 0 ⁇ n ”.
- the rotationally symmetric aspherical surface shown in the specification table is the distance (sag amount) along the optical axis direction from the tangent plane of each aspherical surface at height y in the vertical direction from the optical axis.
- the cone coefficient is ⁇
- the ⁇ -th order aspheric coefficient is Cn, it is expressed by the following aspheric expression. Note that the description of aspherical coefficients that are 0 (zero) is omitted.
- ⁇ is the focal length
- 8 is the shooting magnification
- DO is the distance from the object to the object side lens surface of the negative meniscus lens L 1 1 in the first lens group G 1 (shooting distance)
- Bf is the back focus
- TL is the optical total length of the high zoom lens.
- mm is generally used as the unit of focal length f, radius of curvature r, and other lengths listed in all the following specifications.
- the optical system is not limited to this because the same optical performance can be obtained even when proportional expansion or proportional reduction is performed. Note that, in the specification values of the examples other than the present example, the same symbols as those of the present example are used.
- Figures 5A, 5B, and 5C are graphs showing the amount of light in the object image when focused at infinity in the wide-angle end state.
- Figure 5B shows maximum anti-vibration.
- FIG. 6A, 6B, and 6C are graphs showing various aberrations when focusing on infinity
- FIG. 6A shows a wide-angle end state
- FIG. 6B shows an intermediate focal length state
- FIG. 6G shows a telephoto end state.
- Figures 7A, 7B, and 7C are graphs showing various aberrations when focusing at close range.
- FN ⁇ is the F number
- NA is the numerical aperture
- Y is the image height
- the spherical aberration diagram shows the F-number or numerical aperture value corresponding to the maximum aperture
- the astigmatism diagram and the distortion diagram show the maximum image height
- the coma diagram shows the value of each image height.
- the solid line represents the sagittal image plane
- the broken line represents the meridional image plane.
- the zoom lens according to the present embodiment is in the wide-angle end state, the intermediate focus It can be seen that in each of the distance state and the telephoto end state, various aberrations are corrected satisfactorily at both infinity focusing and close-up focusing, and excellent imaging performance is obtained. '
- the basic configuration of the image pickup apparatus according to the present embodiment is the same as that of the image pickup apparatus according to the first embodiment, a description thereof will be omitted, and a high-magnification zoom lens having a configuration different from that of the first embodiment will be described. Only the details will be described.
- FIG. 8 is a diagram showing a lens configuration at the time of focusing at infinity in the wide-angle end state W, the intermediate focal length state M, and the telephoto end state T of the high-magnification zoom lens in the imaging apparatus according to the second embodiment of the present application. It is.
- the zoom lens according to the present embodiment includes, in order from the object side, a first lens group G 1 having a positive refractive power, a second lens group G 2 having a negative refractive power, and an aperture stop S.
- the first lens group G 1 includes, in order from the object side, a cemented positive lens of a negative meniscus lens L 1 1 having a convex surface facing the object side and a positive meniscus lens L 1 2 having a convex surface facing the object side, and the object side And a positive meniscus lens L 1 3 with a convex surface facing to.
- the second lens group G 2 includes, in order from the object side, a negative meniscus lens L 21 having a convex surface facing the object side, a biconcave negative lens L 2 2 having an aspheric object side lens surface, and an object side. It consists of a cemented negative lens with a positive meniscus lens L 2 3 with its convex surface facing.
- the third lens group G 3 is composed of, in order from the object side, a biconvex positive lens L 3 1 and a negative meniscus lens L 3 2 with a concave surface facing the object side.
- the fourth lens group G 4 includes, in order from the object side, a front group G 4 F having a positive refractive power and a rear group G 4 R having a negative refractive power.
- the front group G 4 F is composed of a biconvex positive lens L 4 1 whose image side lens surface is aspheric, and the rear group G 4 R is an object side In this order, it consists of a cemented negative lens of a biconvex positive lens L 4 2 and a biconcave negative lens L 4 3.
- the fifth lens group G 5 is composed of a positive meniscus lens L 51 having a convex surface directed toward the object side.
- the first lens group G1 moved to the object side, and the second lens group G2 once moved to the image side. Later, it moves to the object side (moves with a concave movement trajectory to the object side), the third lens group G 3 moves to the object side, and the fourth lens group G 4 moves to the object side. At this time, the aperture stop S moves integrally with the third lens group G3.
- the fixed fifth lens group G5 moves to the object side during zooming when focusing from an object at infinity to a close object.
- Table 2 shows specific numerical values of the high-magnification zoom lens in this example. (Table 2)
- Figures 9A, 9B, and 9C are graphs showing the amount of light in the object image when focused at infinity in the wide-angle end state.
- Fig. 9B shows maximum anti-vibration.
- FIG. 10A, 10B, and 10C are graphs showing various aberrations at infinity focusing.
- FIG. 1 OA shows the wide-angle end state
- FIG. 10B shows the intermediate focal length state
- FIG. 10C shows the telephoto end state.
- Fig. 1 1A, 1 1B, 1 1C are graphs showing various aberrations when focusing at close range.
- the high magnification zoom lens according to the present embodiment is in the wide-angle end state, the intermediate focal length state, and the telephoto end state, both at infinity and at close focus.
- Various aberrations are corrected well and it has excellent imaging performance.
- a five-group lens is shown as a numerical example of the high-magnification zoom lens of the present application.
- a lens obtained by adding an additional lens group to these lenses is equivalent to the effect of the present invention.
- this is a high-magnification zoom lens.
- the lens surface of the lens constituting the high-magnification zoom lens lens of the present application may be an aspherical surface.
- This aspherical surface may be any of an aspherical surface by grinding, a glass mold aspherical surface in which glass is molded into an aspherical shape, or a composite aspherical surface in which a resin provided on the glass surface is formed in an aspherical shape.
- an antireflection film having a high transmittance in a wide wavelength region may be applied to the lens surface of the lens constituting the high zoom lens of the present application.
- flare and goose can be reduced, and high optical performance can be achieved with high contrast.
- image stabilization is performed by moving the solid-state image sensor in a direction substantially perpendicular to the optical axis, and effective pixels in the solid-state image sensor can be used efficiently, and at the time of image stabilization.
- image stabilization it is possible to realize an imaging device, an imaging method, and a high-magnification zoom lens that can maintain the peripheral light amount ratio of the photographed image favorably.
- the high zoom lens of the present application is suitable for an electronic still camera or the like, has a half angle of view of 4 degrees or less in the telephoto end state, an F number of less than 6 in the telephoto end state, and a zoom ratio. Approximately 10 times can be achieved, and the lens barrel diameter can be reduced.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lenses (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07715031A EP2003479B1 (en) | 2006-03-31 | 2007-02-21 | Zoom lens of the telephoto type with a high zoom ratio |
US12/160,568 US7843647B2 (en) | 2006-03-31 | 2007-02-21 | Imaging apparatus, imaging method and high zoom ratio zoom lens system |
AT07715031T ATE493682T1 (de) | 2006-03-31 | 2007-02-21 | Telezoomobjektiv mit hohem vergrösserungsverhältnis |
CN2007800081558A CN101395518B (zh) | 2006-03-31 | 2007-02-21 | 成像设备、成像方法和高变焦比变焦透镜系统 |
JP2008508461A JP5071380B2 (ja) | 2006-03-31 | 2007-02-21 | 撮像装置、撮像方法、高変倍ズームレンズ |
DE602007011584T DE602007011584D1 (de) | 2006-03-31 | 2007-02-21 | Telezoomobjektiv mit hohem Vergrösserungsverhältnis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-099295 | 2006-03-31 | ||
JP2006099295 | 2006-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007113952A1 true WO2007113952A1 (ja) | 2007-10-11 |
Family
ID=38563225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/053696 WO2007113952A1 (ja) | 2006-03-31 | 2007-02-21 | 撮像装置、撮像方法、高変倍ズームレンズ |
Country Status (7)
Country | Link |
---|---|
US (1) | US7843647B2 (ja) |
EP (1) | EP2003479B1 (ja) |
JP (1) | JP5071380B2 (ja) |
CN (1) | CN101395518B (ja) |
AT (1) | ATE493682T1 (ja) |
DE (1) | DE602007011584D1 (ja) |
WO (1) | WO2007113952A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101472046B (zh) * | 2007-11-16 | 2011-08-17 | 富士能株式会社 | 摄像系统、摄像装置、移动终端设备、车载设备及医疗设备 |
JP2013012859A (ja) * | 2011-06-28 | 2013-01-17 | Sharp Corp | 撮像レンズおよび撮像モジュール |
CN101478631B (zh) * | 2007-12-07 | 2013-04-10 | 富士能株式会社 | 摄像系统及其制造方法、和具备该摄像系统的摄像装置 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5154981B2 (ja) * | 2008-03-10 | 2013-02-27 | オリンパスイメージング株式会社 | ズームレンズを備えた撮像装置 |
JP5423235B2 (ja) * | 2009-08-20 | 2014-02-19 | ソニー株式会社 | 撮像装置 |
JP5293716B2 (ja) * | 2010-09-30 | 2013-09-18 | 株式会社ニコン | 交換レンズ、カメラボディおよびカメラシステム |
TWI420143B (zh) * | 2011-07-01 | 2013-12-21 | Asia Optical Co Inc | Zoom lens |
CN103135195A (zh) * | 2011-12-01 | 2013-06-05 | 佛山普立华科技有限公司 | 变焦镜头以及成像装置 |
CN103163637A (zh) * | 2011-12-17 | 2013-06-19 | 鸿富锦精密工业(深圳)有限公司 | 变焦镜头 |
CN103207446A (zh) * | 2013-04-23 | 2013-07-17 | 中国科学院西安光学精密机械研究所 | 一种用于微光探测的光学耦合系统 |
US9602727B2 (en) * | 2015-03-06 | 2017-03-21 | Panasonic Intellectual Property Management Co., Ltd. | Imaging apparatus and imaging method |
US10171739B2 (en) * | 2016-03-02 | 2019-01-01 | Panasonic Intellectual Property Management Co., Ltd. | Image pickup device |
US11209578B2 (en) | 2017-08-02 | 2021-12-28 | Sintai Optical (Shenzhen) Co., Ltd. | Camera device |
TWI627439B (zh) * | 2017-08-02 | 2018-06-21 | 信泰光學(深圳)有限公司 | 鏡頭裝置 |
JP2021139973A (ja) * | 2020-03-03 | 2021-09-16 | キヤノン株式会社 | 撮像装置およびその制御方法、撮像システム |
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JPH06160779A (ja) | 1992-11-25 | 1994-06-07 | Canon Inc | 可変頂角プリズム装置を有した防振光学系 |
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US5579171A (en) | 1993-03-30 | 1996-11-26 | Nikon Corporation | Zoom lens equipped with the image stabilizing function |
JP4288408B2 (ja) | 2003-02-20 | 2009-07-01 | 株式会社ニコン | 像シフト可能なズームレンズ |
JP4606105B2 (ja) * | 2004-09-24 | 2011-01-05 | Hoya株式会社 | 像ブレ補正装置 |
JP4774710B2 (ja) | 2004-09-30 | 2011-09-14 | 株式会社ニコン | ズームレンズ |
JP2007033879A (ja) * | 2005-07-27 | 2007-02-08 | Sony Corp | 撮像レンズ装置及び撮像装置 |
US20080297901A1 (en) * | 2007-05-29 | 2008-12-04 | Nikon Corporation | Zoom lens system, optical apparatus, and method for forming an image |
-
2007
- 2007-02-21 EP EP07715031A patent/EP2003479B1/en not_active Not-in-force
- 2007-02-21 DE DE602007011584T patent/DE602007011584D1/de active Active
- 2007-02-21 CN CN2007800081558A patent/CN101395518B/zh not_active Expired - Fee Related
- 2007-02-21 JP JP2008508461A patent/JP5071380B2/ja not_active Expired - Fee Related
- 2007-02-21 AT AT07715031T patent/ATE493682T1/de not_active IP Right Cessation
- 2007-02-21 US US12/160,568 patent/US7843647B2/en active Active
- 2007-02-21 WO PCT/JP2007/053696 patent/WO2007113952A1/ja active Application Filing
Patent Citations (4)
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JPH0537849A (ja) | 1991-08-01 | 1993-02-12 | Olympus Optical Co Ltd | カメラ |
JPH06289298A (ja) * | 1993-03-30 | 1994-10-18 | Nikon Corp | 防振機能を備えたズームレンズ |
JPH06339054A (ja) | 1993-05-31 | 1994-12-06 | Nikon Corp | 変倍撮像装置 |
JP2001337272A (ja) * | 2000-05-26 | 2001-12-07 | Matsushita Electric Ind Co Ltd | 手振れ補正機能搭載ズームレンズ及びそれを用いたビデオカメラ |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101472046B (zh) * | 2007-11-16 | 2011-08-17 | 富士能株式会社 | 摄像系统、摄像装置、移动终端设备、车载设备及医疗设备 |
CN101478631B (zh) * | 2007-12-07 | 2013-04-10 | 富士能株式会社 | 摄像系统及其制造方法、和具备该摄像系统的摄像装置 |
JP2013012859A (ja) * | 2011-06-28 | 2013-01-17 | Sharp Corp | 撮像レンズおよび撮像モジュール |
Also Published As
Publication number | Publication date |
---|---|
CN101395518B (zh) | 2012-01-25 |
EP2003479A4 (en) | 2009-07-15 |
DE602007011584D1 (de) | 2011-02-10 |
CN101395518A (zh) | 2009-03-25 |
ATE493682T1 (de) | 2011-01-15 |
EP2003479A1 (en) | 2008-12-17 |
JPWO2007113952A1 (ja) | 2009-08-13 |
JP5071380B2 (ja) | 2012-11-14 |
US7843647B2 (en) | 2010-11-30 |
EP2003479B1 (en) | 2010-12-29 |
US20100232032A1 (en) | 2010-09-16 |
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