WO2012101958A1 - ズームレンズ系、撮像装置及びカメラ - Google Patents
ズームレンズ系、撮像装置及びカメラ Download PDFInfo
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- WO2012101958A1 WO2012101958A1 PCT/JP2012/000064 JP2012000064W WO2012101958A1 WO 2012101958 A1 WO2012101958 A1 WO 2012101958A1 JP 2012000064 W JP2012000064 W JP 2012000064W WO 2012101958 A1 WO2012101958 A1 WO 2012101958A1
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- Prior art keywords
- lens group
- lens
- image
- zoom
- optical axis
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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
- G02B15/145121—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 +-+-+
Definitions
- the present invention relates to a zoom lens system, an imaging device, and a camera.
- the present invention includes a high-resolution zoom lens system that has a relatively high zooming ratio, has a relatively high zooming ratio, has little aberration fluctuation during zooming, and is thin.
- the present invention relates to an imaging device and a thin and compact camera including the imaging device.
- a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power or a negative power Various zoom lens systems having three or more positive / negative / positive / negative / negative groups in which a subsequent lens group is arranged have been proposed.
- a camera having an image sensor that performs photoelectric conversion such as a digital still camera or a digital video camera, is simply referred to as a digital camera.
- Japanese Patent Laid-Open No. 2009-282429 has a configuration of three or more positive and negative groups, the fourth lens group has negative refractive power, the fifth lens group has positive refractive power, and the second lens group has There is disclosed a zoom lens having a cemented lens composed of one positive lens and one negative lens, and the third lens group having three cemented lenses composed of two positive lenses and one negative lens. .
- Japanese Patent Application Laid-Open No. 2009-115875 has a configuration of three or more positive and negative groups
- the fourth lens group has a positive refractive power
- At least the first lens group so that the distance between the first lens group and the second lens group, the distance between the second lens group and the third lens group, and the distance between the third lens group and the fourth lens group are changed.
- the fourth lens group moves to the object side
- the third lens group has, in order from the object side, a positive lens having a convex surface facing the object side, a positive lens having a convex surface facing the object side, and a concave surface facing the image side.
- a zoom lens composed of a cemented lens of a negative lens and a negative meniscus lens having a convex surface facing the image side is disclosed.
- Japanese Patent Laid-Open No. 2009-086437 has a configuration of three or more positive and negative groups, the fourth lens group has a positive refractive power, the fifth lens group has a positive refractive power, and from the wide-angle end to the telephoto end.
- the lens position changes until the distance between the first lens group and the second lens group, the distance between the second lens group and the third lens group, the distance between the third lens group and the fourth lens group, and At least the first lens group and the fourth lens group move toward the object side so that the distance between the fourth lens group and the fifth lens group changes
- the fifth lens group includes the front partial lens and the front partial lens.
- a zoom lens having a rear partial lens group arranged on the image side of the group with an air interval and moving the front partial lens group in the optical axis direction to adjust the focus on a short-distance object.
- Japanese Patent Laid-Open No. 2008-304708 has three or more positive and negative groups, the fourth lens group has negative power, the fifth lens group has positive power, the second lens group and the fourth group.
- a zoom lens that is configured and defined with respect to the focal length of the fourth lens group, the focal length of the entire system at the wide angle end, and the focal length of the entire system at the telephoto end.
- Japanese Patent Application Laid-Open No. 2008-281927 has a configuration of three or more positive and negative groups, and in zooming from the wide-angle end to the telephoto end, the distance between the first lens group and the second lens group is increased. The distance between the second lens group and the third lens group is reduced, the first lens group includes at least one negative lens, the second lens group includes a negative lens having a concave surface facing the image side on the most object side, A variable magnification optical system is disclosed in which a definition is made regarding the average Abbe number of the negative lens in the first lens group and the Abbe number of the negative lens closest to the object in the second lens group.
- Japanese Patent Laid-Open No. 2007-047538 has a configuration of three or more positive / negative / positive / negative / negative groups, the first lens group is composed of a negative lens and a positive lens in order from the object side, and the second lens group is at least one.
- the first lens group, the second lens group, and at least one subsequent lens group are moved to perform zooming, and the amount of movement of the first lens group from the wide-angle end to the telephoto end;
- An imaging optical system is disclosed in which the focal length of the entire system at the end, the focal length of the entire system at the wide-angle end, and the focal length of the first lens group are defined.
- Japanese Patent Laid-Open No. 2001-350093 has three or more positive and negative groups, the fourth lens group has negative power, and the focal length of the first lens group and the focal point of the entire system at the telephoto end.
- An imaging lens device including a zoom lens system in which a ratio with respect to a distance is defined is disclosed.
- the zoom lens, the variable power optical system, the imaging optical system, and the zoom lens system disclosed in the patent document are all thinned to a certain extent, but aberration fluctuations easily occur during zooming. It does not have a high zooming ratio and a sufficiently corrected aberration, and cannot satisfy the recent demand for digital cameras.
- An object of the present invention is to provide a high-performance, thin zoom lens system that has a relatively high zooming ratio, has a relatively high zooming ratio, has little aberration variation during zooming, and the zoom lens system. It is an object of the present invention to provide an imaging apparatus including the imaging apparatus and a thin and compact camera including the imaging apparatus.
- zoom lens system That is, the present invention From the object side to the image side, A first lens group; A second lens group; One or more subsequent lens groups, During zooming from the wide-angle end to the telephoto end during imaging, the first lens group and the second lens group are moved along the optical axis to perform zooming, One of the subsequent lens groups does not move along the optical axis during the zooming, but moves along the optical axis during the transition from the imaging state to the retracted state. About.
- the present invention An imaging apparatus capable of outputting an optical image of an object as an electrical image signal, A zoom lens system that forms an optical image of the object; An image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is From the object side to the image side, A first lens group; A second lens group; One or more subsequent lens groups, During zooming from the wide-angle end to the telephoto end during imaging, the first lens group and the second lens group are moved along the optical axis to perform zooming, In the zoom lens system, one of the succeeding lens groups does not move along the optical axis during the zooming, but moves along the optical axis during the transition from the imaging state to the storage state.
- the present invention relates to an imaging apparatus.
- the present invention A camera that converts an optical image of an object into an electrical image signal, and displays and stores the converted image signal;
- An image pickup apparatus including a zoom lens system that forms an optical image of an object, and an image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is From the object side to the image side, A first lens group; A second lens group; One or more subsequent lens groups, During zooming from the wide-angle end to the telephoto end during imaging, the first lens group and the second lens group are moved along the optical axis to perform zooming, In the zoom lens system, one of the succeeding lens groups does not move along the optical axis during the zooming, but moves along the optical axis during the transition from the imaging state to the storage state. There is a camera.
- the zoom lens system which has a high resolution as well as a relatively high zoom ratio, has a small aberration variation during zooming, has a high performance, and is thin.
- An imaging device including the imaging device and a thin and compact camera including the imaging device can be provided.
- FIG. 1 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 1 (Example 1).
- FIG. 2 is a longitudinal aberration diagram of the zoom lens system according to Example 1 when the zoom lens system is in focus at infinity.
- FIG. 3 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 1.
- FIG. 4 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 2 (Example 2).
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 6 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 2.
- FIG. 7 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 3 (Example 3).
- FIG. 8 is a longitudinal aberration diagram of the zoom lens system according to Example 3 when the zoom lens system is in focus at infinity.
- FIG. 9 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 3.
- FIG. 10 is a lens layout diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 4 (Example 4).
- FIG. 11 is a longitudinal aberration diagram of the zoom lens system according to Example 4 when the zoom lens system is in focus at infinity.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 13 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 5 (Example 5).
- FIG. 14 is a longitudinal aberration diagram of the zoom lens system according to Example 5 when the zoom lens system is in focus at infinity.
- FIG. 15 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 5.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 12 is a lateral
- FIG. 16 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 6 (Example 6).
- FIG. 17 is a longitudinal aberration diagram of the zoom lens system according to Example 6 at an infinite focus state.
- FIG. 18 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 6.
- FIG. 19 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 7 (Example 7).
- FIG. 20 is a longitudinal aberration diagram of the zoom lens system according to Example 7 at the infinite focus state.
- FIG. 21 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state, at the telephoto end of a zoom lens system according to Example 7.
- FIG. 22 is a schematic configuration diagram of a digital still camera according to the eighth embodiment.
- (Embodiments 1 to 7) 1, 4, 7, 10, 13, 16, and 19 are lens arrangement diagrams of the zoom lens systems according to Embodiments 1 to 7, respectively.
- 1, 4, 7, 10, 13, 16, and 19 represent the zoom lens system in the infinitely focused state.
- (a) shows the lens configuration at the wide-angle end
- (b) shows the lens configuration at the intermediate position
- (c) shows the lens configuration at the telephoto end.
- the wide-angle end in the shortest focal length condition, representing the focal length f W.
- the intermediate position is an intermediate focal length state
- the telephoto end with the longest focal length condition, representing the focal length f T.
- FIGS. 1, 4, 7, 10, 13 and 16 show the direction in which a later-described fourth lens group G4 moves during focusing from the infinite focus state to the close object focus state.
- Reference numeral 19 denotes a direction in which a later-described third lens group G3 moves during focusing from the infinitely focused state to the close object focused state.
- the zoom lens system according to Embodiment 7 includes, in order from the object side to the image side, a first lens group G1 having negative power, a second lens group G2 having positive power, and a first lens group having positive power.
- 3 lens group G3 and 4th lens group G4 which has positive power are provided.
- the distance between the lens groups that is, the distance between the first lens group G1 and the second lens group G2, the second lens group G2 and the third lens group G3.
- the lens group G2, the third lens group G3, and the fourth lens group G4 move in the direction along the optical axis.
- the distance between the lens groups that is, the distance between the first lens group G1 and the second lens group G2, and the distance between the second lens group G2 and the third lens group G3.
- the first lens group G1, the second lens group G2, and the third lens group G3 are arranged in a direction along the optical axis so that the distance and the distance between the third lens group G3 and the fourth lens group G4 change. Move each one.
- the zoom lens system according to each embodiment can reduce the size of the entire lens system while maintaining high optical performance by arranging these lens groups in a desired power arrangement.
- an asterisk * attached to a specific surface indicates that the surface is aspherical.
- a symbol (+) and a symbol ( ⁇ ) attached to a symbol of each lens group correspond to a power symbol of each lens group.
- the straight line described on the rightmost side represents the position of the image plane S, and the object side of the image plane S, that is, in FIGS.
- An equivalent parallel plate P is provided between the most image side lens surface of the fifth lens group G5, and between the image surface S and the most image side lens surface of the fourth lens group G4 in FIG.
- the first lens group G1 is a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side.
- a positive meniscus second lens element L2 having a convex surface facing the object side
- a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 with a convex surface facing the object side, and a convex surface facing the image side. And a negative meniscus fifth lens element L5 and a biconvex sixth lens element L6.
- the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, and both It consists of a concave ninth lens element L9 and a biconvex tenth lens element L10.
- the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9.
- Surface number 16 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the third lens group G3 and the fourth lens group G4.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the zoom lens system according to Embodiment 1 during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 and the fourth lens group G4 move to the object side substantially monotonously, and the second The lens group G2 moves toward the image side along a convex locus on the image side, the third lens group G3 moves monotonously to the object side, and the fifth lens group G5 is fixed with respect to the image plane S. ing. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 increases.
- the group G4 moves along the optical axis.
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis during focusing from the infinite focus state to the close object focus state.
- the first lens unit G1 includes a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side. And a positive meniscus second lens element L2 having a convex surface facing the object side, and a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 having a convex surface directed toward the object side, and a biconcave second lens element L4. It consists of five lens elements L5 and a biconvex sixth lens element L6. Among these, the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7 and a positive meniscus shape first lens with the convex surface facing the object side. It comprises an eight lens element L8, a negative meniscus ninth lens element L9 with a convex surface facing the object side, and a biconvex tenth lens element L10. Among these, the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9. Surface number 16 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the third lens group G3 and the fourth lens group G4.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the first lens group G1 moves toward the object side while drawing a convex locus on the image side.
- the lens group G2 moves toward the image side along a convex locus on the image side
- the third lens group G3 moves toward the object side substantially monotonically
- the fourth lens group G4 moves toward the object side monotonously.
- the fifth lens group G5 is fixed with respect to the image plane S. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 increases.
- the group G4 moves along the optical axis.
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis during focusing from the infinite focus state to the close object focus state.
- the first lens group G1 is a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side.
- a biconvex second lens element L2 and a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens unit G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 with a convex surface facing the object side, and a convex surface facing the image side. And a negative meniscus fifth lens element L5 and a biconvex sixth lens element L6.
- the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7 and a positive meniscus shape first lens with the convex surface facing the object side. It comprises an eight lens element L8, a negative meniscus ninth lens element L9 with a convex surface facing the object side, and a biconvex tenth lens element L10. Among these, the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9. Surface number 16 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the third lens group G3 and the fourth lens group G4.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the zoom lens system according to Embodiment 3 during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 moves substantially monotonically to the object side, and the second lens group G2 The third lens group G3 moves monotonously to the object side, and the fourth lens group G4 moves to the object side while drawing a convex locus on the image side.
- the fifth lens group G5 is fixed with respect to the image plane S. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 increases.
- the group G4 moves along the optical axis.
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis during focusing from the infinite focus state to the close object focus state.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a biconvex second lens element L2 and a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens unit G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 with a convex surface facing the object side, and a convex surface facing the image side. And a negative meniscus fifth lens element L5 and a biconvex sixth lens element L6.
- the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, and both It consists of a concave ninth lens element L9 and a biconvex tenth lens element L10.
- the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9.
- Surface number 17 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the second lens group G2 and the third lens group G3.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the zoom lens system according to Embodiment 4 during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 and the third lens group G3 move to the object side substantially monotonously, and the second The lens group G2 moves toward the image side with a convex locus on the image side, the fourth lens group G4 moves toward the object side with a slightly convex locus on the image side, and the fifth lens group G5
- the image plane S is fixed. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
- the group G4 moves along the optical axis.
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis when focusing from the infinite focus state to the close object focus state.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a positive meniscus second lens element L2 having a convex surface facing the object side, and a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens unit G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 with a convex surface facing the object side, and a convex surface facing the image side. And a negative meniscus fifth lens element L5 and a biconvex sixth lens element L6. Among these, the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, and both It consists of a concave ninth lens element L9 and a biconvex tenth lens element L10.
- the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9.
- Surface number 17 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the second lens group G2 and the third lens group G3.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the zoom lens system according to Embodiment 5 during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 moves toward the object side along a locus convex to the image side.
- the lens group G2 moves toward the image side along a locus convex toward the image side
- the third lens group G3 moves toward the object side almost monotonously
- the fourth lens group G4 slightly protrudes toward the image side.
- the fifth lens group G5 is fixed with respect to the image plane S by moving toward the object side along a locus. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
- the group G4
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis during focusing from the infinite focus state to the close object focus state.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a biconvex second lens element L2 and a positive meniscus third lens element L3 having a convex surface facing the object side.
- the first lens element L1 and the second lens element L2 are cemented, and in the surface data in the corresponding numerical example described later, the adhesion between the first lens element L1 and the second lens element L2 Surface number 2 is given to the agent layer.
- the second lens unit G2 includes, in order from the object side to the image side, a negative meniscus fourth lens element L4 with a convex surface directed toward the object side, and a biconcave second lens element L4. It consists of five lens elements L5 and a biconvex sixth lens element L6. Among these, the fourth lens element L4 has two aspheric surfaces.
- the third lens unit G3 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, It consists of a concave ninth lens element L9 and a biconvex tenth lens element L10.
- the eighth lens element L8 and the ninth lens element L9 are cemented, and in the surface data in the corresponding numerical value example described later, the adhesion between the eighth lens element L8 and the ninth lens element L9.
- Surface number 17 is given to the agent layer.
- the seventh lens element L7 has two aspheric surfaces.
- the fourth lens unit G4 comprises solely a negative meniscus eleventh lens element L11 with the convex surface facing the object side.
- the fifth lens unit G5 comprises solely a bi-convex twelfth lens element L12.
- the twelfth lens element L12 has two aspheric surfaces.
- an aperture stop A is provided between the second lens group G2 and the third lens group G3.
- the aperture stop A moves on the optical axis integrally with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the twelfth lens element L12.
- the zoom lens system according to Embodiment 6 during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 and the third lens group G3 move to the object side substantially monotonously, The lens group G2 moves toward the image side with a slightly convex locus on the image side, and the fourth lens group G4 moves toward the object side with a slightly convex locus on the image side.
- G5 is fixed with respect to the image plane S. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 increases, the distance between the second lens group G2 and the third lens group G3 decreases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens so that the distance between the group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
- the group G4 moves along the optical axis.
- the fifth lens group G5 is a lens group that does not move along the optical axis during zooming but moves along the optical axis during the transition from the imaging state to the storage state. This corresponds to the lens group ⁇ which is one of the subsequent lens groups.
- the fourth lens group G4 moves toward the image side along the optical axis when focusing from the infinite focus state to the close object focus state.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a positive meniscus second lens element L2 having a convex surface facing the object side.
- the first lens element L1 has two aspheric surfaces.
- the second lens unit G2 includes, in order from the object side to the image side, a positive meniscus third lens element L3 with a convex surface facing the object side, and a convex surface facing the object side.
- the fourth lens element L4 having a positive meniscus shape
- the fifth lens element L5 having a negative meniscus shape having a convex surface facing the object side
- the sixth lens element L6 having a biconvex shape.
- the 4th lens element L4 and the 5th lens element L5 are joined, and in the surface data in the corresponding numerical value example mentioned later, adhesion between these 4th lens element L4 and the 5th lens element L5 Surface number 8 is given to the agent layer.
- the third lens element L3 has an aspheric object side surface.
- the third lens unit G3 comprises solely a positive meniscus seventh lens element L7 with the convex surface facing the image side.
- the fourth lens unit G4 comprises solely a bi-convex eighth lens element L8.
- the eighth lens element L8 has an aspheric image side surface.
- an aperture stop A is provided between the second lens group G2 and the third lens group G3.
- the aperture stop A moves on the optical axis integrally with the second lens group G2 during zooming from the wide-angle end to the telephoto end during imaging.
- a parallel plate P is provided on the object side of the image plane S, that is, between the image plane S and the eighth lens element L8.
- the first lens group G1 moves toward the object side along a locus locus convex to the image side.
- the lens group G2 moves to the object side in a substantially monotonous manner, the third lens group G3 moves to the image side while drawing a convex locus on the object side, and the fourth lens group G4 is fixed with respect to the image plane S.
- the distance between the first lens group G1 and the second lens group G2 decreases, the distance between the second lens group G2 and the third lens group G3 increases, and the third lens group G3 and the fourth lens.
- the first lens group G1, the second lens group G2, and the third lens group G3 move along the optical axis so that the distance from the group G4 changes.
- the fourth lens group G4 corresponds to a lens group that does not move along the optical axis during zooming but moves along the optical axis during transition from the imaging state to the storage state.
- the third lens group G3 moves toward the object side along the optical axis during focusing from the infinite focus state to the close object focus state.
- the fifth lens group G5 is one lens group ⁇ of the succeeding lens groups disposed on the image side of the second lens group G2, and is used during imaging.
- the fourth lens group G4 does not move along the optical axis during zooming from the wide-angle end to the telephoto end during imaging, and is stored from the imaging state. Move along the optical axis when moving to. Accordingly, the aberration can be corrected well, and the entire lens system can be reduced in size while maintaining a high optical performance and a high zooming ratio.
- the fifth lens group G5 arranged closest to the image moves along the optical axis during zooming from the wide-angle end to the telephoto end during imaging.
- the fourth lens arranged closest to the image side corresponds to the lens group ⁇ that moves along the optical axis during the transition from the imaging state to the housed state. Since the group G4 does not move along the optical axis during zooming from the wide-angle end to the telephoto end during imaging, it moves along the optical axis during the transition from the imaging state to the storage state. The complexity of the configuration due to the provision of the lens group between the fifth lens group G5 or the fourth lens group G4 and the image plane can be avoided.
- the fourth lens group G4 is composed of one lens element, so that the entire lens system can be reduced in size.
- rapid focusing is facilitated when focusing from an infinitely focused state to a close object focused state.
- the entire lens system can be reduced in size.
- the fourth lens group G4 moves along the optical axis during focusing from the infinite focus state to the close object focus state. High optical performance can be maintained even in the state.
- the zoom lens system according to Embodiments 1 to 6 has a five-group configuration
- the zoom lens system according to Embodiment 7 has a four-group configuration.
- Image point movement due to vibration of the entire system is corrected by moving one of the fourth lens group G4 or a part of each lens group in a direction perpendicular to the optical axis. That is, it is possible to optically correct image blur due to camera shake, vibration, or the like.
- the third lens group G3 moves in a direction perpendicular to the optical axis, so that Embodiment 7
- the second lens group G2 moves in the direction orthogonal to the optical axis, thereby suppressing the enlargement of the entire zoom lens system and reducing the size of the zoom lens system.
- Image blur correction can be performed while maintaining excellent small imaging characteristics.
- one lens group is composed of a plurality of lens elements
- a part of the sub-lens groups of each lens group is any one of the plurality of lens elements or adjacent to each other.
- a zoom lens system such as the zoom lens systems according to Embodiments 1 to 7
- a plurality of preferable conditions are defined for the zoom lens system according to each embodiment, but a zoom lens system configuration that satisfies all of the plurality of conditions is most desirable.
- individual conditions it is possible to obtain a zoom lens system that exhibits the corresponding effects.
- the zoom lens system includes a first lens group, a second lens group, and one or more subsequent lens groups in order from the object side to the image side.
- zooming is performed by moving the first lens group and the second lens group along the optical axis, and one of the subsequent lens groups is moved during the zooming.
- the zoom lens system having positive power in order from the object side to the image side
- the lens group ⁇ which is one of the succeeding lens groups, does not move along the optical axis during the zooming, and shifts from the imaging state to the retracted state.
- the zoom lens system that moves along the optical axis satisfies the following conditions (1), (2-1), and (a).
- a lens configuration of the zoom lens system is referred to as a basic configuration I of the embodiment.
- L T total lens length at the telephoto end (distance from the most object side surface of the first lens group to the image plane)
- D ⁇ the air equivalent length on the optical axis between the most image side surface and the image surface of the lens group ⁇
- f G ⁇ the combined focal length of the lens group ⁇
- f W focal length of the entire system at the wide-angle end
- f T the focal length of the entire system at the telephoto end.
- the condition (a) is a condition for defining the ratio between the focal length of the entire system at the wide-angle end and the focal length of the entire system at the telephoto end. Since the zoom lens system having the basic configuration satisfies the condition (a), it has a high zooming ratio and can ensure a high magnification.
- the condition (1) is a condition for defining the ratio between the total lens length at the telephoto end and the focal length of the entire system at the telephoto end. If the lower limit of condition (1) is not reached, the total lens length at the telephoto end becomes too short, the focal length of each lens group becomes too small, and the aberration fluctuation at the time of zooming becomes large, making it difficult to correct the aberration. . If the upper limit of condition (1) is exceeded, the total lens length at the telephoto end becomes too short, and it becomes difficult to provide a compact lens barrel, imaging device, and camera.
- the conditions (1) and (1) ′ are preferably satisfied under the following condition (a) ′. f T / f W > 13.0 (a) ′
- the condition (2-1) is a condition for defining the ratio between the air-converted length on the optical axis between the most image side surface and the image surface of the lens group ⁇ and the focal length of the lens group ⁇ . If the lower limit of the condition (2-1) is not reached, the air conversion length on the optical axis between the most image side surface and the image surface of the lens group ⁇ becomes too short, and the aberration variation becomes large, thereby correcting the aberration, particularly the image. It becomes difficult to correct the surface curvature. If the upper limit of the condition (2-1) is exceeded, the air conversion length on the optical axis between the most image side surface and the image surface of the lens group ⁇ becomes too long, and the total lens length becomes long. It becomes difficult to provide an imaging device and a camera.
- the zoom lens system having the basic configuration I like the zoom lens systems according to Embodiments 1 to 6 preferably satisfies the following condition (3). ⁇ 7.0 ⁇ f 1 / f 2 ⁇ 4.0 (3) here, f 1 : Composite focal length of the first lens group f 2 : Composite focal length of the second lens group, It is.
- the condition (3) is a condition for defining the ratio between the focal length of the first lens group and the focal length of the second lens group. If the lower limit of the condition (3) is not reached, the focal length of the second lens group becomes too small, the aberration fluctuation at the time of zooming becomes large, and it becomes difficult to correct the aberration. In addition, the focal length of the first lens group becomes too large, and the amount of movement of the first lens group necessary for securing a high magnification becomes too large, thereby providing a compact lens barrel, imaging device, and camera. It becomes difficult.
- the focal length of the first lens group becomes too small, the aberration fluctuation at the time of zooming becomes large and correction of the aberration becomes difficult, and the diameter of the first lens group becomes large. Therefore, it becomes difficult to provide a compact lens barrel, imaging device, and camera. Further, the error sensitivity with respect to the tilt of the first lens group becomes too high, and it may be difficult to assemble the optical system.
- condition (3) is preferably satisfied in the condition (a) ′.
- the zoom lens system having the basic configuration I like the zoom lens systems according to Embodiments 1 to 6 preferably satisfies the following condition (4).
- f 1 composite focal length of the first lens group
- f 4 the combined focal length of the fourth lens group.
- the condition (4) is a condition for defining the ratio between the focal length of the first lens group and the focal length of the fourth lens group. If the lower limit of condition (4) is not reached, the focal length of the fourth lens group becomes too large, and the amount of movement of the fourth lens group becomes too large, thereby providing a compact lens barrel, imaging device, and camera. It becomes difficult. In addition, since the focal length of the first lens unit becomes too small, the aberration fluctuation at the time of zooming becomes large and it becomes difficult to correct the aberration, and the diameter of the first lens unit becomes large. It becomes difficult to provide a cylinder, an imaging device, and a camera. Further, the error sensitivity with respect to the tilt of the first lens group becomes too high, and it may be difficult to assemble the optical system.
- the focal length of the first lens group becomes too large, and the amount of movement of the first lens group necessary to ensure high magnification becomes too large, resulting in a compact lens barrel and imaging. It becomes difficult to provide a device and a camera.
- the above effect can be further achieved by satisfying at least one of the following conditions (4) ′ and (4) ′′.
- (4) ′ and (4) ′′ 1.5 ⁇
- the zoom lens system in order from the object side to the image side, includes a first lens group, a second lens group, and one or more subsequent lens groups, and has a wide angle during imaging.
- the first lens group and the second lens group are moved along the optical axis to perform zooming, and one of the subsequent lens groups is subjected to zooming.
- the first lens having negative power in order from the object side to the image side in the zoom lens system that moves along the optical axis when moving from the imaging state to the retracted state without moving along the optical axis.
- a lens configuration of the zoom lens system is referred to as a basic configuration II of the embodiment.
- D ⁇ the air-converted length on the optical axis between the most image side surface and the image surface of the lens group that moves along the optical axis during the transition from the imaging state to the storage state
- f G ⁇ the combined focal length of the lens group that moves along the optical axis during the transition from the imaging state to the storage state.
- the condition (2-2) includes the air-converted length on the optical axis between the most image side surface and the image plane of the lens group that moves along the optical axis during the transition from the imaging state to the storage state, and the imaging state. This is a condition for prescribing the ratio of the focal length of the lens unit that moves along the optical axis during transition from the lens to the retracted state. If the lower limit of the condition (2-2) is not reached, the air-converted length on the optical axis between the most image side surface and the image surface of the lens group that moves along the optical axis at the time of transition from the imaging state to the storage state is reduced.
- the air-converted length on the optical axis between the most image side surface and the image plane of the lens group that moves along the optical axis at the time of transition from the imaging state to the retracted state is Since the lens becomes too long and the entire length of the lens becomes long, it becomes difficult to provide a compact lens barrel, imaging device, and camera.
- Each lens group constituting the zoom lens system according to Embodiments 1 to 7 is a refractive lens element that deflects incident light by refraction, that is, a type in which deflection is performed at an interface between media having different refractive indexes.
- the present invention is not limited to this.
- a diffractive lens element that deflects incident light by diffraction a refractive / diffractive hybrid lens element that deflects incident light by a combination of diffractive action and refractive action, and a refractive index that deflects incident light according to the refractive index distribution in the medium
- Each lens group may be composed of a distributed lens element or the like.
- the object side of the image plane S that is, between the image plane S and the most image side lens surface of the fifth lens group G5 in the first to sixth embodiments, and the image plane S in the seventh embodiment.
- the parallel plate P equivalent to the optical low-pass filter, the face plate of the image sensor, or the like is disposed between the lens surface and the most image side lens surface of the fourth lens group G4.
- a birefringent low-pass filter made of quartz or the like with a predetermined crystal axis direction adjusted, a phase-type low-pass filter that achieves a required optical cutoff frequency characteristic by a diffraction effect, and the like can be applied.
- FIG. 22 is a schematic configuration diagram of a digital still camera according to the eighth embodiment.
- the digital still camera includes an image pickup apparatus including a zoom lens system 1 and an image pickup device 2 that is a CCD, a liquid crystal monitor 3, and a housing 4.
- the zoom lens system 1 includes a first lens group G1, a second lens group G2, a third lens group G3, an aperture stop A, a fourth lens group G4, and a fifth lens group G5. It is configured.
- the zoom lens system 1 is disposed on the front side, and the imaging element 2 is disposed on the rear side of the zoom lens system 1.
- a liquid crystal monitor 3 is disposed on the rear side of the housing 4, and an optical image of the subject by the zoom lens system 1 is formed on the image plane S.
- the lens barrel is composed of a main lens barrel 5, a movable lens barrel 6, and a cylindrical cam 7.
- the first lens group G1, the second lens group G2, the third lens group G3, the aperture stop A, the fourth lens group G4, and the fifth lens group G5 are predetermined with respect to the imaging device 2. It is possible to perform zooming from the wide-angle end to the telephoto end.
- the fourth lens group G4 is movable in the optical axis direction by a focus adjustment motor.
- the zoom lens system according to Embodiment 1 for a digital still camera, it is possible to provide a small digital still camera that has a high ability to correct resolution and curvature of field and has a short overall lens length when not in use. it can.
- the digital still camera shown in FIG. 22 may use any of the zoom lens systems according to Embodiments 2 to 7 instead of the zoom lens system according to Embodiment 1.
- the optical system of the digital still camera shown in FIG. 22 can also be used for a digital video camera for moving images. In this case, not only a still image but also a moving image with high resolution can be taken.
- the zoom lens system according to the first to seventh embodiments is shown as the zoom lens system 1, but these zoom lens systems need to use all zooming areas. There is no. That is, a range in which the optical performance is ensured may be cut out according to a desired zooming area, and used as a zoom lens system having a lower magnification than the zoom lens system described in the first to seventh embodiments.
- the zoom lens system is applied to a so-called collapsible lens barrel, but the present invention is not limited to this.
- a prism having an internal reflection surface or a surface reflection mirror may be disposed at an arbitrary position such as in the first lens group G1, and the zoom lens system may be applied to a so-called bent lens barrel.
- some lenses constituting the zoom lens system such as the entire second lens group G2, the entire third lens group G3, the second lens group G2, or a part of the third lens group G3.
- the zoom lens system may be applied to a so-called sliding lens barrel in which the group is retracted from the optical axis when retracted.
- an image pickup apparatus including the zoom lens system according to Embodiments 1 to 7 described above and an image pickup device such as a CCD or a CMOS is used as a mobile information terminal such as a smartphone, a personal digital assistance, or a monitoring camera in a monitoring system. It can also be applied to Web cameras, in-vehicle cameras, and the like.
- the unit of length in the table is “mm”, and the unit of angle of view is “°”.
- r is a radius of curvature
- d is a surface interval
- nd is a refractive index with respect to the d line
- vd is an Abbe number with respect to the d line.
- the surface marked with * is an aspherical surface
- the aspherical shape is defined by the following equation.
- ⁇ is a conic constant
- A4, A6, A8, A10, A12, A14, and A16 are fourth-order, sixth-order, eighth-order, tenth-order, twelfth-order, fourteenth-order, and sixteenth-order aspheric coefficients, respectively.
- each longitudinal aberration diagram shows the aberration at the wide angle end, (b) shows the intermediate position, and (c) shows the aberration at the telephoto end.
- Each longitudinal aberration diagram shows spherical aberration, astigmatism, and distortion aberration in order from the left side.
- spherical aberration is represented by SA (mm)
- astigmatism is represented by AST (mm)
- distortion is represented by DIS (%).
- the vertical axis represents the F number
- the solid line is the d-line with a wavelength of 587.56 nm
- the short broken line is the F-line with a wavelength of 486.13 nm
- the long broken line is the characteristic of the C-line with a wavelength of 656.28 nm.
- the vertical axis represents the image height
- the solid line represents the sagittal plane
- the broken line represents the meridional plane.
- the vertical axis represents the image height.
- the F number is F
- the image height is H
- the sagittal plane is s
- the meridional plane is m.
- 3, 6, 9, 12, 15, 18, and 21 are lateral aberration diagrams at the telephoto end of the zoom lens systems according to Numerical Examples 1 to 7, respectively.
- the upper three aberration diagrams show the basic state where image blur correction is not performed at the telephoto end
- the lower three aberration diagrams show the third lens group in FIGS. 3, 6, 9, 12, 15, and 18. 21 corresponds to the image blur correction state at the telephoto end where the entire second lens group G2 is moved by a predetermined amount in the direction perpendicular to the optical axis in FIG.
- the upper row shows the lateral aberration at the image point of 70% of the maximum image height
- the middle row shows the lateral aberration at the axial image point
- the lower row shows the lateral aberration at the image point of -70% of the maximum image height.
- the upper stage is the lateral aberration at the image point of 70% of the maximum image height
- the middle stage is the lateral aberration at the axial image point
- the lower stage is at the image point of -70% of the maximum image height.
- the horizontal axis represents the distance from the principal ray on the pupil plane
- the solid line is the d line
- the short broken line is the F line
- the long broken line is the C line characteristic.
- the meridional plane is a plane including the optical axis of the first lens group G1 and the optical axis of the third lens group G3.
- the meridional plane is a plane including the optical axis of the first lens group G1 and the optical axis of the second lens group G2.
- the amount of movement in the direction perpendicular to the optical axis of the third lens group G3 in the image blur correction state at the telephoto end is as follows.
- the amount of movement of the second lens group G2 in the image blur correction state at the telephoto end in the direction perpendicular to the optical axis is as follows.
- Numerical example 3 0.105 mm
- Numerical example 4 0.107 mm
- Numerical example 5 0.091 mm
- Numerical example 6 0.118 mm
- Numerical example 7 0.061 mm
- the image decentering amount is the above in the direction in which the entire third lens group G3 or the entire second lens group G2 is perpendicular to the optical axis. It is equal to the amount of image eccentricity when moving in parallel by each value.
- Table 12 (various data) Zoom ratio 14.70813 Wide angle Medium telephoto Focal length 4.4497 17.0715 65.4465 F number 3.44057 4.93618 6.13742 Angle of view 44.8465 12.6355 3.3530 Image height 3.7000 3.9000 3.9000 Total lens length 48.4953 54.1777 64.9678 BF 0.48583 0.51702 0.45765 d6 0.3000 11.8239 23.0982 d12 17.5156 5.7604 0.8791 d21 2.9673 9.6372 11.7242 d23 3.4442 2.6568 5.0262 Entrance pupil position 10.6950 36.6197 120.0867 Exit pupil position -23.9052 -32.1572 -84.5633 Front principal point position 14.3330 44.7717 135.1546 Rear principal point position 44.0456 37.1062 -0.4787 Single lens data Lens Start surface Focal length 1 1 -91.9315 2 3 49.1423 3 5 57.0679 4 7 -6.8298 5 9 -11
- Table 13 (surface data) Surface number r d nd vd Object ⁇ 1 29.50560 0.75000 1.84666 23.8 2 20.30020 0.01000 1.56732 42.8 3 20.30020 2.28950 1.49700 81.6 4 162.76100 0.15000 5 20.71550 1.62350 1.61800 63.4 6 79.60740 Variable 7 * 90.12470 0.30000 1.80470 41.0 8 * 5.01100 3.45700 9 -8.05880 0.30000 1.77250 49.6 10 -85.88260 0.33570 11 31.52910 1.08950 1.94595 18.0 12 -31.52910 Variable 13 (Aperture) ⁇ 0.30000 14 * 5.71080 1.99000 1.58332 59.1 15 * -17.52600 0.70010 16 8.42610 1.26090 1.51680 64.2 17 -71.90270 0.01000 1.56732 42.8 18 -71.90270 0.30000 1.90366 31.3 19 4.68850 0.35310 20 7.79650 1.25280
- Table 22 shows the corresponding values for each condition in the zoom lens system of each numerical example.
- the zoom lens system according to the present invention is applicable to digital input devices such as a digital camera, a portable information terminal such as a smartphone, a personal digital assistance, a surveillance camera in a surveillance system, a web camera, an in-vehicle camera, etc. It is suitable for a photographing optical system that requires high image quality.
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Abstract
Description
物体側から像側へと順に、
第1レンズ群と、
第2レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び前記第2レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動することを特徴とする、ズームレンズ系
に関する。
物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、
物体側から像側へと順に、
第1レンズ群と、
第2レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び前記第2レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動する
ことを特徴とするズームレンズ系である、撮像装置
に関する。
物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、
物体側から像側へと順に、
第1レンズ群と、
第2レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び前記第2レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動する
ことを特徴とするズームレンズ系である、カメラ
に関する。
図1、4、7、10、13、16及び19は、各々実施の形態1~7に係るズームレンズ系のレンズ配置図である。
0.8<LT/fT<1.2 ・・・(1)
0.12<Dα/fGα<0.30 ・・・(2-1)
fT/fW>9.0 ・・・(a)
ここで、
LT:望遠端におけるレンズ全長(第1レンズ群の最物体側面から像面までの距離)、
Dα:レンズ群αの最像側面と像面との光軸上での空気換算長、
fGα:レンズ群αの合成焦点距離、
fW:広角端における全系の焦点距離、
fT:望遠端における全系の焦点距離
である。
0.9<LT/fT ・・・(1)’
fT/fW>13.0 ・・・(a)’
0.17<Dα/fGα ・・・(2-1)’
-7.0<f1/f2<-4.0 ・・・(3)
ここで、
f1:第1レンズ群の合成焦点距離
f2:第2レンズ群の合成焦点距離、
である。
0.5<|f1/f4|<4.2 ・・・(4)
ここで、
f1:第1レンズ群の合成焦点距離、
f4:第4レンズ群の合成焦点距離
である。
1.5<|f1/f4| ・・・(4)’
|f1/f4|<3.0 ・・・(4)’’
0.12<Dβ/fGβ<0.29 ・・・(2-2)
ここで、
Dβ:撮像状態から収納状態への移行の際に光軸に沿って移動するレンズ群の最像側面と像面との光軸上での空気換算長、
fGβ:撮像状態から収納状態への移行の際に光軸に沿って移動するレンズ群の合成焦点距離
である。
図22は、実施の形態8に係るデジタルスチルカメラの概略構成図である。図22において、デジタルスチルカメラは、ズームレンズ系1とCCDである撮像素子2とを含む撮像装置と、液晶モニタ3と、筐体4とから構成される。ズームレンズ系1として、実施の形態1に係るズームレンズ系が用いられている。図22において、ズームレンズ系1は、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、開口絞りAと、第4レンズ群G4と、第5レンズ群G5とから構成されている。筐体4は、前側にズームレンズ系1が配置され、ズームレンズ系1の後側には、撮像素子2が配置されている。筐体4の後側に液晶モニタ3が配置され、ズームレンズ系1による被写体の光学的な像が像面Sに形成される。
数値実施例1 0.094mm
数値実施例2 0.082mm
数値実施例3 0.105mm
数値実施例4 0.107mm
数値実施例5 0.091mm
数値実施例6 0.118mm
数値実施例7 0.061mm
数値実施例1のズームレンズ系は、図1に示した実施の形態1に対応する。数値実施例1のズームレンズ系の面データを表1に、非球面データを表2に、各種データを表3に示す。
面番号 r d nd vd
物面 ∞
1 39.12230 0.75000 1.84666 23.8
2 24.34130 0.01000 1.56732 42.8
3 24.34130 2.57250 1.49700 81.6
4 669.01800 0.15000
5 24.12950 1.79680 1.72916 54.7
6 79.16250 可変
7* 40.41520 0.50000 1.87702 37.0
8* 4.92640 3.70580
9 -8.33810 0.30000 1.72916 54.7
10 -88.01810 0.22870
11 27.63010 1.21460 1.94595 18.0
12 -34.07630 可変
13* 5.61650 2.15450 1.58332 59.1
14* -22.78570 0.50340
15 8.07340 1.26250 1.49700 81.6
16 -490.35460 0.01000 1.56732 42.8
17 -490.35460 0.30000 1.90366 31.3
18 4.81270 0.35810
19 12.15960 1.20290 1.52996 55.8
20 -11.64830 0.40000
21(絞り) ∞ 可変
22 30.16120 0.50000 1.88300 40.8
23 8.20900 可変
24* 9.68560 2.23030 1.52996 55.8
25* -93.78700 2.36430
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-5.63481E-04, A6= 3.11555E-05, A8=-8.17750E-07
A10= 8.06105E-09, A12= 0.00000E+00
第8面
K= 0.00000E+00, A4=-8.76674E-04, A6=-1.12420E-05, A8= 2.70324E-06
A10=-1.33807E-07, A12= 0.00000E+00
第13面
K= 0.00000E+00, A4=-7.29201E-04, A6=-1.17969E-05, A8=-6.10823E-06
A10= 6.74583E-07, A12=-4.48240E-08
第14面
K= 0.00000E+00, A4= 8.59168E-05, A6=-2.47587E-05, A8=-1.87567E-06
A10= 1.46231E-07, A12=-2.05601E-08
第24面
K= 0.00000E+00, A4=-6.47588E-04, A6= 8.67198E-05, A8=-5.62682E-06
A10= 1.93110E-07, A12=-4.72323E-09
第25面
K= 0.00000E+00, A4=-7.33472E-04, A6= 3.89493E-05, A8=-1.04425E-06
A10=-4.32516E-08, A12= 0.00000E+00
ズーム比 14.71263
広角 中間 望遠
焦点距離 4.4482 17.0693 65.4446
Fナンバー 3.44055 4.49104 6.16167
画角 45.0718 12.6331 3.4043
像高 3.7000 3.9000 3.9000
レンズ全長 46.3632 51.3938 62.4654
BF 0.48241 0.50874 0.45483
d6 0.3000 10.7372 21.3604
d12 16.7953 5.1183 0.3000
d21 3.4276 9.1186 10.4391
d23 2.0635 2.6166 6.6167
入射瞳位置 11.0268 35.9621 125.0203
射出瞳位置 -11.4186 -20.0329 -54.5925
前側主点位置 13.8124 38.8475 112.6593
後側主点位置 41.9150 34.3246 -2.9791
単レンズデータ
レンズ 始面 焦点距離
1 1 -77.9069
2 3 50.7587
3 5 46.9551
4 7 -6.4393
5 9 -12.6519
6 11 16.2860
7 13 7.9466
8 15 15.9947
9 17 -5.2725
10 19 11.4258
11 22 -12.9111
12 24 16.6900
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 36.28987 5.27930 1.15149 3.09442
2 7 -5.85194 5.94910 0.35671 1.13559
3 13 9.23453 6.19140 -0.30820 1.47404
4 22 -12.91111 0.50000 0.36877 0.60037
5 24 16.68996 5.37460 0.13748 1.16482
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.21205 -0.34104 -0.89535
3 13 -0.48200 -1.12114 -1.38610
4 22 1.66825 1.71504 2.01678
5 24 0.71886 0.71728 0.72051
数値実施例2のズームレンズ系は、図4に示した実施の形態2に対応する。数値実施例2のズームレンズ系の面データを表4に、非球面データを表5に、各種データを表6に示す。
面番号 r d nd vd
物面 ∞
1 31.08320 0.75000 1.84666 23.8
2 20.54660 0.01000 1.56732 42.8
3 20.54660 2.64550 1.49700 81.6
4 152.85880 0.15000
5 24.63830 1.66280 1.72916 54.7
6 107.30480 可変
7* 49.15490 0.50000 1.87702 37.0
8* 5.54240 3.71900
9 -10.64890 0.30000 1.72916 54.7
10 112.56090 0.22460
11 20.71430 1.29040 1.94595 18.0
12 -81.81860 可変
13* 5.43680 1.87130 1.58332 59.1
14* -22.36220 0.40260
15 6.57880 1.45360 1.49700 81.6
16 46.91020 0.01000 1.56732 42.8
17 46.91020 0.30000 1.90366 31.3
18 4.17360 0.30410
19 7.92300 1.07350 1.52996 55.8
20 -15.71980 0.40000
21(絞り) ∞ 可変
22 19.40140 0.50000 1.88300 40.8
23 5.56050 可変
24* 9.90500 2.27410 1.52996 55.8
25* -84.49410 2.25770
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-6.82260E-04, A6= 3.42662E-05, A8=-7.06863E-07
A10= 5.24073E-09, A12= 0.00000E+00
第8面
K= 0.00000E+00, A4=-8.55257E-04, A6=-2.08462E-06, A8= 2.57595E-06
A10=-7.86710E-08, A12= 0.00000E+00
第13面
K= 0.00000E+00, A4=-7.38915E-04, A6= 6.12372E-06, A8=-7.45037E-06
A10= 7.92758E-07, A12=-5.22500E-08
第14面
K= 0.00000E+00, A4= 1.71678E-04, A6= 7.80329E-06, A8=-4.99088E-06
A10= 3.22395E-07, A12=-2.42946E-08
第24面
K= 0.00000E+00, A4=-4.14254E-04, A6= 1.04417E-04, A8=-5.96937E-06
A10= 1.47200E-07, A12=-3.27839E-09
第25面
K= 0.00000E+00, A4=-8.50740E-04, A6= 9.56957E-05, A8=-5.15879E-06
A10= 3.50417E-08, A12= 0.00000E+00
ズーム比 11.03063
広角 中間 望遠
焦点距離 4.4498 14.8500 49.0837
Fナンバー 3.44101 4.73422 6.16062
画角 42.8989 14.5685 4.5571
像高 3.5000 3.9000 3.9000
レンズ全長 47.2343 46.2180 52.9687
BF 0.48722 0.48685 0.45643
d6 0.3000 8.1432 17.4571
d12 19.1524 6.1570 0.3000
d21 1.6677 4.6342 6.6017
d23 2.7478 3.9176 5.2743
入射瞳位置 12.0384 30.0889 89.9355
射出瞳位置 -10.1822 -16.6238 -24.5944
前側主点位置 14.6324 32.0509 42.8463
後側主点位置 42.7846 31.3680 3.8850
単レンズデータ
レンズ 始面 焦点距離
1 1 -74.0055
2 3 47.4464
3 5 43.4920
4 7 -7.1611
5 9 -13.3284
6 11 17.5816
7 13 7.6883
8 15 15.2143
9 17 -5.0866
10 19 10.0990
11 22 -8.9793
12 24 16.8698
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 33.79578 5.21830 1.12238 3.01496
2 7 -6.26139 6.03400 0.48676 1.44491
3 13 8.11525 5.81510 -0.43186 1.41460
4 22 -8.97929 0.50000 0.37862 0.60851
5 24 16.86977 5.31180 0.15727 1.19825
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.25511 -0.37491 -0.84760
3 13 -0.35202 -0.75087 -1.02588
4 22 2.01596 2.14616 2.29086
5 24 0.72728 0.72730 0.72910
数値実施例3のズームレンズ系は、図7に示した実施の形態3に対応する。数値実施例3のズームレンズ系の面データを表7に、非球面データを表8に、各種データを表9に示す。
面番号 r d nd vd
物面 ∞
1 57.54400 0.75000 1.84666 23.8
2 32.90100 0.01000 1.56732 42.8
3 32.90100 2.61090 1.49700 81.6
4 -118.20340 0.15000
5 24.21850 1.52590 1.72916 54.7
6 50.97680 可変
7* 29.35900 0.50000 1.87702 37.0
8* 5.29960 4.05300
9 -7.89080 0.30000 1.72916 54.7
10 -60.13670 0.23680
11 41.52720 1.27550 1.94595 18.0
12 -26.55800 可変
13* 6.06960 2.37110 1.58332 59.1
14* -23.88150 0.31890
15 7.14320 1.38840 1.49700 81.6
16 109.61190 0.01000 1.56732 42.8
17 109.61190 0.30000 1.90366 31.3
18 4.95430 0.45800
19 23.14400 1.09800 1.52996 55.8
20 -12.30130 0.40000
21(絞り) ∞ 可変
22 30.20470 0.50000 1.88300 40.8
23 10.26950 可変
24* 10.66430 2.04270 1.52996 55.8
25* -98.22820 2.84340
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-7.15790E-04, A6= 3.34579E-05, A8=-6.64896E-07
A10= 4.88846E-09, A12= 0.00000E+00
第8面
K= 0.00000E+00, A4=-9.90606E-04, A6=-3.67284E-06, A8= 1.95498E-06
A10=-6.58573E-08, A12= 0.00000E+00
第13面
K= 0.00000E+00, A4=-6.16082E-04, A6=-3.68104E-07, A8=-5.75983E-06
A10= 5.43157E-07, A12=-2.72234E-08
第14面
K= 0.00000E+00, A4= 1.78340E-05, A6=-3.72044E-06, A8=-4.60879E-06
A10= 4.06332E-07, A12=-2.11784E-08
第24面
K= 0.00000E+00, A4=-1.08567E-03, A6= 1.14745E-04, A8=-6.05001E-06
A10= 1.55891E-07, A12=-2.89195E-09
第25面
K= 0.00000E+00, A4=-1.36541E-03, A6= 1.09701E-04, A8=-4.19438E-06
A10= 2.41875E-08, A12= 0.00000E+00
ズーム比 16.47230
広角 中間 望遠
焦点距離 4.4501 18.0934 73.3027
Fナンバー 3.44164 4.20219 6.16157
画角 41.5033 11.9452 3.0330
像高 3.4000 3.9000 3.9000
レンズ全長 49.0167 55.3864 70.1058
BF 0.49135 0.52241 0.45938
d6 0.3000 12.2557 24.4860
d12 18.5099 5.2649 0.3000
d21 3.6190 11.3314 12.4827
d23 2.1738 2.0894 8.4551
入射瞳位置 11.3371 38.4866 134.4812
射出瞳位置 -12.3397 -22.9441 -128.8978
前側主点位置 14.2438 42.6294 166.2455
後側主点位置 44.5666 37.2930 -3.1969
単レンズデータ
レンズ 始面 焦点距離
1 1 -92.0253
2 3 52.0843
3 5 61.7901
4 7 -7.4461
5 9 -12.4864
6 11 17.2815
7 13 8.5459
8 15 15.3058
9 17 -5.7498
10 19 15.3205
11 22 -17.8312
12 24 18.2708
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 41.06452 5.04680 1.21748 3.07560
2 7 -6.41603 6.36530 0.48274 1.30249
3 13 10.09615 6.34440 -0.66695 1.36063
4 22 -17.83121 0.50000 0.40711 0.63842
5 24 18.27085 5.66610 0.13161 1.09620
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.20116 -0.32179 -0.83233
3 13 -0.49210 -1.25492 -1.58845
4 22 1.51412 1.51273 1.86297
5 24 0.72299 0.72129 0.72474
数値実施例4のズームレンズ系は、図10に示した実施の形態4に対応する。数値実施例4のズームレンズ系の面データを表10に、非球面データを表11に、各種データを表12に示す。
面番号 r d nd vd
物面 ∞
1 38.10960 0.75000 1.84666 23.8
2 25.35260 0.01000 1.56732 42.8
3 25.35260 2.78990 1.49700 81.6
4 -642.15170 0.15000
5 24.04300 1.82120 1.61800 63.4
6 73.35630 可変
7* 77.53870 0.30000 1.80470 41.0
8* 5.12330 3.46690
9 -8.13460 0.30000 1.77250 49.6
10 -131.30370 0.36710
11 31.35140 1.09790 1.94595 18.0
12 -31.35140 可変
13(絞り) ∞ 0.30000
14* 5.94890 2.03240 1.58332 59.1
15* -17.80730 0.70000
16 9.26870 1.39790 1.51680 64.2
17 -68.21660 0.01000 1.56732 42.8
18 -68.21660 0.30000 1.90366 31.3
19 4.90140 0.35620
20 8.27820 1.21480 1.54310 56.0
21 -22.95510 可変
22 86.76290 0.30000 1.83481 42.7
23 9.62100 可変
24* 8.23900 2.36560 1.54310 56.0
25* -166.66670 2.97250
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-2.43832E-04, A6= 3.09032E-05, A8=-9.76061E-07
A10= 9.97676E-09, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第8面
K= 0.00000E+00, A4=-4.35886E-04, A6=-1.88562E-05, A8= 7.93244E-06
A10=-5.17166E-07, A12= 1.49341E-08, A14=-2.91643E-12, A16=-9.80475E-12
第14面
K= 0.00000E+00, A4=-6.32762E-04, A6= 7.96501E-07, A8=-6.15899E-06
A10= 7.67277E-07, A12=-5.16774E-08, A14= 0.00000E+00, A16= 0.00000E+00
第15面
K= 0.00000E+00, A4= 1.12134E-04, A6=-1.00326E-05, A8=-8.86762E-07
A10=-4.22673E-10, A12=-1.38890E-08, A14= 0.00000E+00, A16= 0.00000E+00
第24面
K= 0.00000E+00, A4=-3.87357E-04, A6= 3.77291E-05, A8=-3.04711E-06
A10= 1.13074E-07, A12=-2.82329E-09, A14= 0.00000E+00, A16= 0.00000E+00
第25面
K= 0.00000E+00, A4=-2.37072E-04, A6= 2.09946E-05, A8=-1.36284E-06
A10=-7.22202E-09, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
ズーム比 14.70813
広角 中間 望遠
焦点距離 4.4497 17.0715 65.4465
Fナンバー 3.44057 4.93618 6.13742
画角 44.8465 12.6355 3.3530
像高 3.7000 3.9000 3.9000
レンズ全長 48.4953 54.1777 64.9678
BF 0.48583 0.51702 0.45765
d6 0.3000 11.8239 23.0982
d12 17.5156 5.7604 0.8791
d21 2.9673 9.6372 11.7242
d23 3.4442 2.6568 5.0262
入射瞳位置 10.6950 36.6197 120.0867
射出瞳位置 -23.9052 -32.1572 -84.5633
前側主点位置 14.3330 44.7717 135.1546
後側主点位置 44.0456 37.1062 -0.4787
単レンズデータ
レンズ 始面 焦点距離
1 1 -91.9315
2 3 49.1423
3 5 57.0679
4 7 -6.8298
5 9 -11.2376
6 11 16.7137
7 14 7.8933
8 16 15.8872
9 18 -5.0505
10 20 11.3580
11 22 -12.9851
12 24 14.5249
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 37.80453 5.52110 1.10917 3.06143
2 7 -5.67153 5.53190 0.37885 1.06457
3 13 9.41307 6.31130 -0.37817 1.66831
4 22 -12.98510 0.30000 0.18422 0.32043
5 24 14.52486 6.11810 0.07256 1.16357
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.19561 -0.32463 -0.91531
3 13 -0.49614 -1.18416 -1.46668
4 22 1.93913 1.88465 2.05543
5 24 0.62544 0.62330 0.62738
数値実施例5のズームレンズ系は、図13に示した実施の形態5に対応する。数値実施例5のズームレンズ系の面データを表13に、非球面データを表14に、各種データを表15に示す。
面番号 r d nd vd
物面 ∞
1 29.50560 0.75000 1.84666 23.8
2 20.30020 0.01000 1.56732 42.8
3 20.30020 2.28950 1.49700 81.6
4 162.76100 0.15000
5 20.71550 1.62350 1.61800 63.4
6 79.60740 可変
7* 90.12470 0.30000 1.80470 41.0
8* 5.01100 3.45700
9 -8.05880 0.30000 1.77250 49.6
10 -85.88260 0.33570
11 31.52910 1.08950 1.94595 18.0
12 -31.52910 可変
13(絞り) ∞ 0.30000
14* 5.71080 1.99000 1.58332 59.1
15* -17.52600 0.70010
16 8.42610 1.26090 1.51680 64.2
17 -71.90270 0.01000 1.56732 42.8
18 -71.90270 0.30000 1.90366 31.3
19 4.68850 0.35310
20 7.79650 1.25280 1.54310 56.0
21 -21.70030 可変
22 48.88550 0.30000 1.83481 42.7
23 8.08190 可変
24* 8.03430 2.13500 1.54310 56.0
25* -166.66670 2.73670
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-3.18533E-04, A6= 3.55924E-05, A8=-1.01356E-06
A10= 9.22264E-09, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第8面
K= 0.00000E+00, A4=-5.37324E-04, A6=-2.34009E-05, A8= 1.04166E-05
A10=-9.38688E-07, A12= 4.07741E-08, A14= 1.57540E-11, A16=-3.87512E-11
第14面
K= 0.00000E+00, A4=-6.22701E-04, A6=-5.86876E-06, A8=-4.35896E-06
A10= 5.04985E-07, A12=-3.59114E-08, A14= 0.00000E+00, A16= 0.00000E+00
第15面
K= 0.00000E+00, A4= 2.35682E-04, A6=-9.86043E-06, A8=-1.51818E-06
A10= 8.50833E-08, A12=-1.43231E-08, A14= 0.00000E+00, A16= 0.00000E+00
第24面
K= 0.00000E+00, A4= 6.44821E-05, A6= 2.92458E-06, A8=-2.26083E-06
A10= 8.03181E-08, A12=-1.32337E-09, A14= 0.00000E+00, A16= 0.00000E+00
第25面
K= 0.00000E+00, A4= 4.83691E-04, A6=-3.72234E-05, A8=-1.14449E-06
A10= 3.63588E-08, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
ズーム比 11.03066
広角 中間 望遠
焦点距離 4.4500 15.0214 49.0864
Fナンバー 3.44052 4.83310 6.13613
画角 43.9176 14.3782 4.4694
像高 3.6000 3.9000 3.9000
レンズ全長 46.0390 47.5734 56.9703
BF 0.49075 0.50200 0.45938
d6 0.3000 8.2150 17.4900
d12 16.7821 5.2667 0.8840
d21 2.6710 8.4157 11.0757
d23 3.3714 2.7502 4.6374
入射瞳位置 10.2859 26.3657 75.3817
射出瞳位置 -22.0284 -28.4421 -60.8186
前側主点位置 13.8566 33.5913 85.1477
後側主点位置 41.5890 32.5520 7.8838
単レンズデータ
レンズ 始面 焦点距離
1 1 -79.8334
2 3 46.4184
3 5 44.8391
4 7 -6.6042
5 9 -11.5317
6 11 16.8066
7 14 7.6246
8 16 14.6726
9 18 -4.8617
10 20 10.7214
11 22 -11.6376
12 24 14.1740
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 32.90701 4.82300 0.85776 2.56382
2 7 -5.58020 5.48220 0.35035 1.02982
3 13 8.88719 6.16690 -0.19177 1.72324
4 22 -11.63758 0.30000 0.19655 0.33249
5 24 14.17404 5.65170 0.06390 1.07511
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.22853 -0.33815 -0.77210
3 13 -0.46748 -1.09620 -1.44599
4 22 1.97012 1.91908 2.07240
5 24 0.64249 0.64170 0.64470
数値実施例6のズームレンズ系は、図16に示した実施の形態6に対応する。数値実施例6のズームレンズ系の面データを表16に、非球面データを表17に、各種データを表18に示す。
面番号 r d nd vd
物面 ∞
1 39.25250 0.75000 1.84666 23.8
2 26.16450 0.01000 1.56732 42.8
3 26.16450 2.76770 1.49700 81.6
4 -665.87080 0.15000
5 24.07010 1.82930 1.61800 63.4
6 70.08620 可変
7* 81.24860 0.30000 1.80470 41.0
8* 5.36480 3.48490
9 -8.41640 0.30000 1.77250 49.6
10 673.41420 0.42160
11 31.11300 1.14240 1.94595 18.0
12 -31.11300 可変
13(絞り) ∞ 0.30000
14* 8.12620 1.87340 1.58332 59.1
15* -15.38680 0.98510
16 8.63450 1.80160 1.51680 64.2
17 -27.64690 0.01000 1.56732 42.8
18 -27.64690 0.30000 1.90366 31.3
19 6.41180 0.45960
20 20.19940 1.11910 1.54310 56.0
21 -13.88010 可変
22 67.47690 0.30000 1.83481 42.7
23 12.04360 可変
24* 9.17150 1.88180 1.54310 56.0
25* -164.30470 3.64070
26 ∞ 0.78000 1.51680 64.2
27 ∞ (BF)
像面 ∞
第7面
K= 0.00000E+00, A4=-3.23786E-04, A6= 3.66448E-05, A8=-1.06013E-06
A10= 1.00154E-08, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第8面
K= 0.00000E+00, A4=-4.75344E-04, A6=-1.50151E-05, A8= 8.86557E-06
A10=-7.66806E-07, A12= 3.85951E-08, A14=-8.58029E-10, A16= 1.55704E-12
第14面
K= 0.00000E+00, A4=-6.17610E-04, A6=-1.27913E-05, A8=-5.01159E-06
A10= 3.57293E-07, A12=-3.16898E-08, A14= 0.00000E+00, A16= 0.00000E+00
第15面
K= 0.00000E+00, A4=-2.21972E-04, A6=-1.71845E-05, A8=-3.42507E-06
A10= 1.05513E-07, A12=-1.50385E-08, A14= 0.00000E+00, A16= 0.00000E+00
第24面
K= 0.00000E+00, A4= 1.14280E-04, A6= 1.52328E-05, A8=-2.82688E-06
A10= 1.17459E-07, A12=-3.65809E-09, A14= 0.00000E+00, A16= 0.00000E+00
第25面
K= 0.00000E+00, A4= 5.10887E-04, A6=-1.82374E-05, A8=-5.43331E-07
A10=-2.93424E-08, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
ズーム比 16.47220
広角 中間 望遠
焦点距離 4.4500 18.0951 73.3017
Fナンバー 3.44047 4.99381 6.13817
画角 44.8967 11.9877 2.9917
像高 3.7000 3.9000 3.9000
レンズ全長 52.5325 58.6836 69.8425
BF 0.49889 0.49462 0.45413
d6 0.3000 12.5338 24.2209
d12 19.2741 6.3027 0.8571
d21 2.4026 10.8191 13.5974
d23 5.4497 3.9262 6.1058
入射瞳位置 10.9122 39.1491 132.3414
射出瞳位置 -37.5373 -57.9325 -287.3651
前側主点位置 14.8416 51.6401 186.9747
後側主点位置 48.0825 40.5885 -3.4591
単レンズデータ
レンズ 始面 焦点距離
1 1 -95.1828
2 3 50.7221
3 5 58.4344
4 7 -7.1508
5 9 -10.7585
6 11 16.5935
7 14 9.3920
8 16 12.9506
9 18 -5.7356
10 20 15.3252
11 22 -17.6045
12 24 16.0558
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 38.73439 5.50700 1.07264 3.02435
2 7 -5.76063 5.64890 0.42621 1.13613
3 13 10.30241 6.84880 -0.11156 1.88515
4 22 -17.60450 0.30000 0.19952 0.33561
5 24 16.05580 6.30250 0.06472 0.98811
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 7 -0.19354 -0.32859 -0.98573
3 13 -0.50880 -1.27900 -1.61102
4 22 1.82885 1.74171 1.85990
5 24 0.63793 0.63820 0.64072
数値実施例7のズームレンズ系は、図19に示した実施の形態7に対応する。数値実施例7のズームレンズ系の面データを表19に、非球面データを表20に、各種データを表21に示す。
面番号 r d nd vd
物面 ∞
1* 107.61930 0.30000 1.80470 41.0
2* 4.80030 2.22660
3 9.23190 1.30640 2.01960 21.5
4 17.02490 可変
5* 6.15710 1.10820 1.80470 41.0
6 25.14250 0.15000
7 4.83310 1.80860 1.49700 81.6
8 16.80910 0.01000 1.56732 42.8
9 16.80910 0.30000 1.84666 23.8
10 3.57810 0.62800
11 13.95400 0.70000 1.83481 42.7
12 -50.59070 0.44800
13(絞り) ∞ 可変
14 -81.13990 0.76170 1.48700 70.4
15 -34.02960 可変
16 33.76820 1.38300 1.51845 70.0
17* -20.74100 2.00000
18 ∞ 0.78000 1.51680 64.2
19 ∞ (BF)
像面 ∞
第1面
K= 0.00000E+00, A4= 5.36509E-06, A6=-8.80525E-06, A8= 2.78793E-07
A10=-2.73007E-09, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第2面
K=-7.90720E-01, A4= 1.73138E-04, A6=-2.18061E-05, A8= 1.60898E-06
A10=-1.17064E-07, A12= 5.04376E-09, A14=-9.09651E-11, A16= 3.70038E-13
第5面
K= 0.00000E+00, A4=-2.13927E-04, A6=-2.25575E-05, A8= 7.30892E-06
A10=-1.49209E-06, A12= 1.43204E-07, A14=-5.34905E-09, A16= 0.00000E+00
第17面
K= 0.00000E+00, A4=-2.79314E-04, A6= 1.31652E-04, A8=-1.41220E-05
A10= 6.77625E-07, A12=-1.21299E-08, A14= 0.00000E+00, A16= 0.00000E+00
ズーム比 4.73498
広角 中間 望遠
焦点距離 4.6570 10.1335 22.0509
Fナンバー 2.90051 4.56685 6.36731
画角 41.9158 21.0653 9.8562
像高 3.7000 3.9000 3.9000
レンズ全長 34.0477 29.8951 38.5106
BF 0.80055 0.79714 0.79138
d4 14.8661 4.7519 0.3000
d13 3.4705 7.6218 22.5087
d15 1.0000 2.8138 1.0000
入射瞳位置 6.9771 5.7917 4.9350
射出瞳位置 -10.2692 -26.5545 140.8443
前側主点位置 9.6749 12.1708 30.4577
後側主点位置 29.3906 19.7616 16.4597
単レンズデータ
レンズ 始面 焦点距離
1 1 -6.2520
2 3 18.2372
3 5 9.8758
4 7 12.9975
5 9 -5.4254
6 11 13.1665
7 14 119.7162
8 16 25.0000
ズームレンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -10.88697 3.83300 -0.72858 -0.10340
2 5 9.70236 5.15280 -1.51843 0.46068
3 14 119.71618 0.76170 0.87760 1.12976
4 16 24.99997 4.16300 0.56917 1.29917
ズームレンズ群倍率
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 5 -0.52534 -1.16134 -2.48614
3 14 0.95410 0.93899 0.95421
4 16 0.85342 0.85356 0.85379
G2 第2レンズ群
G3 第3レンズ群
G4 第4レンズ群
G5 第5レンズ群
L1 第1レンズ素子
L2 第2レンズ素子
L3 第3レンズ素子
L4 第4レンズ素子
L5 第5レンズ素子
L6 第6レンズ素子
L7 第7レンズ素子
L8 第8レンズ素子
L9 第9レンズ素子
L10 第10レンズ素子
L11 第11レンズ素子
L12 第12レンズ素子
A 開口絞り
P 平行平板
S 像面
1 ズームレンズ系
2 撮像素子
3 液晶モニタ
4 筐体
5 主鏡筒
6 移動鏡筒
7 円筒カム
Claims (16)
- 物体側から像側へと順に、
第1レンズ群と、
第2レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び前記第2レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動することを特徴とする、ズームレンズ系。 - 物体側から像側へと順に、
正のパワーを有する第1レンズ群と、
負のパワーを有する第2レンズ群と、
正のパワーを有する第3レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群、前記第2レンズ群及び前記第3レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つであるレンズ群αが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動し、
以下の条件(1)、(2-1)及び(a)を満足する、請求項1に記載のズームレンズ系:
0.8<LT/fT<1.2 ・・・(1)
0.12<Dα/fGα<0.30 ・・・(2-1)
fT/fW>9.0 ・・・(a)
ここで、
LT:望遠端におけるレンズ全長(第1レンズ群の最物体側面から像面までの距離)、
Dα:レンズ群αの最像側面と像面との光軸上での空気換算長、
fGα:レンズ群αの合成焦点距離、
fW:広角端における全系の焦点距離、
fT:望遠端における全系の焦点距離
である。 - レンズ群αが、最も像側に配置されたレンズ群である、請求項2に記載のズームレンズ系。
- 後続レンズ群として、負のパワーを有する第4レンズ群及び正のパワーを有する第5レンズ群を備える、請求項2又は3に記載のズームレンズ系。
- 以下の条件(3)を満足する、請求項2~4のいずれか1つに記載のズームレンズ系:
-7.0<f1/f2<-4.0 ・・・(3)
ここで、
f1:第1レンズ群の合成焦点距離、
f2:第2レンズ群の合成焦点距離
である。 - 以下の条件(4)を満足する、請求項2~4のいずれか1つに記載のズームレンズ系:
0.5<|f1/f4|<4.2 ・・・(4)
ここで、
f1:第1レンズ群の合成焦点距離、
f4:第4レンズ群の合成焦点距離
である。 - 第4レンズ群が、1枚のレンズ素子からなる、請求項2~4のいずれか1つに記載のズームレンズ系。
- 第5レンズ群が、1枚のレンズ素子からなる、請求項2~4のいずれか1つに記載のズームレンズ系。
- 無限遠合焦状態から近接物体合焦状態へのフォーカシングの際に、第4レンズ群又は第5レンズ群が光軸に沿って移動する、請求項2~4のいずれか1つに記載のズームレンズ系。
- 物体側から像側へと順に、
負のパワーを有する第1レンズ群と、
正のパワーを有する第2レンズ群と、
1つ以上の後続レンズ群とを備え、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び前記第2レンズ群を光軸に沿って移動させて変倍を行い、
前記後続レンズ群の1つが、前記ズーミングの際には光軸に沿って移動せず、撮像状態から収納状態への移行の際に光軸に沿って移動する、請求項1に記載のズームレンズ系。 - 以下の条件(2-2)を満足する、請求項10に記載のズームレンズ系:
0.12<Dβ/fGβ<0.29 ・・・(2-2)
ここで、
Dβ:撮像状態から収納状態への移行の際に光軸に沿って移動するレンズ群の最像側面と像面との光軸上での空気換算長、
fGβ:撮像状態から収納状態への移行の際に光軸に沿って移動するレンズ群の合成焦点距離
である。 - 撮像状態から収納状態への移行の際に光軸に沿って移動するレンズ群が、最も像側に配置されたレンズ群である、請求項10又は11に記載のズームレンズ系。
- 後続レンズ群として、正のパワーを有する第3レンズ群を備える、請求項10又は11に記載のズームレンズ系。
- 後続レンズ群として、正のパワーを有する第3レンズ群及び正のパワーを有する第4レンズ群を備える、請求項10又は11に記載のズームレンズ系。
- 物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、請求項1に記載のズームレンズ系である、撮像装置。 - 物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、請求項1に記載のズームレンズ系である、カメラ。
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JP2014106243A (ja) * | 2012-11-22 | 2014-06-09 | Olympus Imaging Corp | ズームレンズ及びそれを備えた撮像装置 |
JP2014203027A (ja) * | 2013-04-09 | 2014-10-27 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
JP5662621B2 (ja) * | 2012-07-25 | 2015-02-04 | オリンパス株式会社 | ズームレンズ及びそれを備えた撮像装置 |
JP2016126226A (ja) * | 2015-01-07 | 2016-07-11 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
WO2017131223A1 (ja) * | 2016-01-28 | 2017-08-03 | 株式会社ニコン | ズームレンズ、光学機器及びズームレンズの製造方法 |
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WO2012101959A1 (ja) * | 2011-01-24 | 2012-08-02 | パナソニック株式会社 | ズームレンズ系、撮像装置及びカメラ |
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JP5126496B2 (ja) * | 2007-11-02 | 2013-01-23 | 株式会社ニコン | ズームレンズ及びこのズームレンズを備えた光学機器 |
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- 2012-01-06 JP JP2012539903A patent/JP5162729B2/ja not_active Expired - Fee Related
- 2012-01-06 WO PCT/JP2012/000064 patent/WO2012101958A1/ja active Application Filing
- 2012-01-06 CN CN201280000802.1A patent/CN102782556B/zh not_active Expired - Fee Related
- 2012-09-10 US US13/607,835 patent/US8576492B2/en active Active
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JP2007233130A (ja) * | 2006-03-02 | 2007-09-13 | Konica Minolta Opto Inc | 撮像光学系及びレンズ鏡胴並びに撮像装置 |
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JP5662621B2 (ja) * | 2012-07-25 | 2015-02-04 | オリンパス株式会社 | ズームレンズ及びそれを備えた撮像装置 |
JPWO2014017572A1 (ja) * | 2012-07-25 | 2016-07-11 | オリンパス株式会社 | ズームレンズ及びそれを備えた撮像装置 |
JP2014106243A (ja) * | 2012-11-22 | 2014-06-09 | Olympus Imaging Corp | ズームレンズ及びそれを備えた撮像装置 |
JP2014203027A (ja) * | 2013-04-09 | 2014-10-27 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
JP2016126226A (ja) * | 2015-01-07 | 2016-07-11 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
US10310255B2 (en) | 2015-01-07 | 2019-06-04 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
WO2017131223A1 (ja) * | 2016-01-28 | 2017-08-03 | 株式会社ニコン | ズームレンズ、光学機器及びズームレンズの製造方法 |
JPWO2017131223A1 (ja) * | 2016-01-28 | 2018-11-15 | 株式会社ニコン | ズームレンズ、光学機器及びズームレンズの製造方法 |
US10754130B2 (en) | 2016-01-28 | 2020-08-25 | Nikon Corporation | Zoom lens, optical apparatus and method for manufacturing the zoom lens |
Also Published As
Publication number | Publication date |
---|---|
CN102782556B (zh) | 2014-09-03 |
US20130002934A1 (en) | 2013-01-03 |
JPWO2012101958A1 (ja) | 2014-06-30 |
CN102782556A (zh) | 2012-11-14 |
US8576492B2 (en) | 2013-11-05 |
JP5162729B2 (ja) | 2013-03-13 |
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