WO2017145208A1 - ズームレンズ系、ズームレンズ系を有する撮像装置及び撮像装置を有する車両 - Google Patents
ズームレンズ系、ズームレンズ系を有する撮像装置及び撮像装置を有する車両 Download PDFInfo
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- WO2017145208A1 WO2017145208A1 PCT/JP2016/005017 JP2016005017W WO2017145208A1 WO 2017145208 A1 WO2017145208 A1 WO 2017145208A1 JP 2016005017 W JP2016005017 W JP 2016005017W WO 2017145208 A1 WO2017145208 A1 WO 2017145208A1
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- lens
- lens group
- zoom
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- lens system
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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
- G02B15/142—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 two groups only
- G02B15/1425—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 two groups only the first group being negative
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- 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
- G02B15/143—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 three groups only
- G02B15/1435—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 three groups only the first group being negative
- G02B15/143503—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 three groups only the first group being negative arranged -+-
-
- 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
- G02B15/143—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 three groups only
- G02B15/1435—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 three groups only the first group being negative
- G02B15/143507—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 three groups only the first group being negative arranged -++
-
- 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
- G02B15/22—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 with movable lens means specially adapted for focusing at close distances
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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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
- G02B15/142—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 two groups only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
Definitions
- the present disclosure relates to a zoom lens system, an imaging device having a zoom lens system, and a vehicle having the imaging device.
- Patent Document 1 includes a first lens group having negative power in order from the object side to the image side, a second lens group having positive power, and a third lens group having positive power.
- a bifocal switching type imaging lens that changes magnification by movement along the optical axis is disclosed.
- This disclosure provides a zoom lens system in which various aberrations are favorably corrected.
- the zoom lens system includes, in order from the object side to the image side, a first lens group having a negative power and a second lens group having a positive power.
- the first lens group has at least two negative lenses.
- one of the first lens group and the second lens group is fixed with respect to the image plane, and the angle of view changes as the other moves along the optical axis.
- a zoom lens system in which various aberrations are favorably corrected, an imaging device using the zoom lens system, and a vehicle including the imaging device.
- FIG. 1 is a lens arrangement diagram of a zoom lens system according to Embodiment 1 (Numerical Example 1).
- FIG. 2 is a longitudinal aberration diagram in the infinitely focused state according to Numerical Example 1.
- FIG. 3 is a lens layout diagram of the zoom lens system according to Embodiment 2 (Numerical Example 2).
- FIG. 4 is a longitudinal aberration diagram in the infinite focus state according to Numerical Example 2.
- FIG. 5 is a lens layout diagram of the zoom lens system according to Embodiment 3 (Numerical Example 3).
- 6 is a longitudinal aberration diagram in the infinitely focused state according to Numerical Example 3.
- FIG. FIG. 7 is a lens arrangement diagram of a zoom lens system according to Embodiment 4 (Numerical Example 4).
- FIG. 8 is a longitudinal aberration diagram in the infinitely focused state according to Numerical Example 4.
- FIG. 9 is a lens layout diagram of the zoom lens system according to Embodiment 5 (Numerical Example 5).
- FIG. 10 is a longitudinal aberration diagram in the infinitely focused state according to Numerical Example 5.
- FIG. 11 is a lens arrangement diagram of a zoom lens system according to Embodiment 6 (Numerical Example 6).
- FIG. 12 is a longitudinal aberration diagram in the infinite focus state according to Numerical Example 6.
- FIG. 13 is a schematic configuration diagram of an imaging apparatus according to the seventh embodiment.
- FIG. 14 is a schematic configuration diagram of an imaging apparatus according to the eighth embodiment.
- FIG. 15 is a schematic configuration diagram of an automobile according to the ninth embodiment.
- FIG. 16 is a schematic configuration diagram of an imaging apparatus according to the tenth embodiment.
- the lens group is a group composed of at least one lens element.
- the power, the composite focal length, etc. are determined for each lens group.
- Embodiments 1 to 6 1, 3, 5, 7, 9, and 11 are lens arrangement diagrams of the lens systems according to Embodiments 1 to 6, respectively, and all represent a zoom lens system in an infinite focus state.
- (a) shows the lens configuration at the wide angle end (shortest focal length state: focal length fW), and (b) shows the lens configuration at the telephoto end (longest focal length state: focal length fT).
- the arrows provided between the figures (a) and (b) are straight lines obtained by connecting the positions of the lens groups in the respective states of the wide-angle end and the telephoto end in order from the top. The wide-angle end and the telephoto end are simply connected by a straight line, and may be different from the actual movement of each lens group.
- 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 (the surface on the object side of the image sensor) S.
- FIG. 1 shows a zoom lens system according to the first embodiment.
- the zoom lens system 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 parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6, a seventh lens element L7 having positive power, and an eighth lens element L8 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a biconcave shape.
- the second lens element L2 has an aspheric shape on the object-side and image-side concave surfaces.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a biconvex shape.
- the fifth lens element L5 has a biconvex shape.
- the fifth lens element L5 has an aspheric shape on the convex surface on the object side.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a biconvex shape.
- the eighth lens element L8 has a meniscus shape with the convex surface facing the object side.
- the eighth lens element L8 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the second lens group G2 moves to the object side during zooming from the wide-angle end to the telephoto end during imaging, and the first lens group G1 and the image plane S do not move. That is, during zooming, the second lens group G2 is moved along the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the image plane S increases. Moving.
- FIG. 3 shows a zoom lens system according to the second embodiment.
- the zoom lens system 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 third lens group G3 having positive power. And a parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6 and a seventh lens element L7 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the third lens group G3 includes an eighth lens element L8 having a positive power.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a biconcave shape.
- the second lens element L2 has an aspheric shape on the object-side and image-side concave surfaces.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a meniscus shape with a convex surface facing the object side.
- the fourth lens element L4 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the fifth lens element L5 has a biconvex shape.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a meniscus shape with the convex surface facing the object side.
- the seventh lens element L7 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the lens elements in the third lens group G3 will be described.
- the eighth lens element L8 has a biconvex shape.
- the eighth lens element L8 has an aspheric shape on the convex surface on the object side and the image side.
- the zoom lens system during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves to the object side, and the first lens group G1, the third lens group G3, and the image plane S do not move. . That is, during zooming, the second lens group G2 is placed on the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the third lens group G3 increases. Move along.
- FIG. 5 shows a zoom lens system according to the third embodiment.
- the zoom lens system 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 third lens group G3 having negative power. And a parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6, a seventh lens element L7 having positive power, and an eighth lens element L8 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the third lens group G3 includes a ninth lens element L9 having negative power.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a biconcave shape.
- the second lens element L2 has an aspheric shape on the object-side and image-side concave surfaces.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a meniscus shape with a convex surface facing the object side.
- the fifth lens element L5 has a biconvex shape.
- the fifth lens element L5 has an aspheric shape on the convex surface on the object side.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a biconvex shape.
- the eighth lens element L8 has a meniscus shape with the convex surface facing the object side.
- the ninth lens element L9 has a meniscus shape with a concave surface facing the object side.
- the ninth lens element L9 has an aspheric shape on the object-side concave surface and the image-side convex surface.
- the zoom lens system during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves to the object side, and the first lens group G1, the third lens group G3, and the image plane S do not move. . That is, during zooming, the second lens group G2 is placed on the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the third lens group G3 increases. Move along.
- FIG. 7 shows a zoom lens system according to the fourth embodiment.
- the zoom lens system 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 third lens group G3 having positive power. And a parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6 and a seventh lens element L7 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the third lens group G3 includes an eighth lens element L8 having a positive power.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a biconcave shape.
- the second lens element L2 has an aspheric shape on the object-side and image-side concave surfaces.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a meniscus shape with a convex surface facing the object side.
- the fourth lens element L4 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the fifth lens element L5 has a meniscus shape with a concave surface facing the object side.
- the fifth lens element L5 has an aspheric shape on the concave surface on the object side.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a biconvex shape.
- the lens elements in the third lens group G3 will be described.
- the eighth lens element L8 has a biconvex shape.
- the eighth lens element L8 has an aspheric shape on the convex surface on the object side and the image side.
- the zoom lens system during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves to the object side, and the first lens group G1, the third lens group G3, and the image plane S do not move. . That is, during zooming, the second lens group G2 is placed on the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the third lens group G3 increases. Move along.
- FIG. 9 shows a zoom lens system according to the fifth embodiment.
- the zoom lens system 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 third lens group G3 having negative power. And a parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6, a seventh lens element L7 having positive power, and an eighth lens element L8 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the third lens group G3 includes a ninth lens element L9 having negative power.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a biconcave shape.
- the second lens element L2 has an aspheric shape on the object-side and image-side concave surfaces.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a biconvex shape.
- the fifth lens element L5 has a biconvex shape.
- the fifth lens element L5 has an aspheric shape on the convex surface on the object side.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a biconvex shape.
- the eighth lens element L8 has a meniscus shape with the convex surface facing the object side.
- the ninth lens element L9 has a meniscus shape with a convex surface facing the object side.
- the ninth lens element L9 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the zoom lens system during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves to the object side, and the first lens group G1, the third lens group G3, and the image plane S do not move. . That is, during zooming, the second lens group G2 is placed on the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the third lens group G3 increases. Move along.
- FIG. 11 illustrates a zoom lens system according to Embodiment 6.
- the zoom lens system 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 parallel plate P.
- the first lens group G1 includes, in order from the object side to the image side, a first lens element L1 having negative power, a second lens element L2 having negative power, and a third lens element L3 having positive power. Prepare.
- the second lens group G2 includes, in order from the object side to the image side, a fourth lens element L4 having a positive power, an aperture stop A, a fifth lens element L5 having a positive power, and a sixth lens having a negative power.
- An element L6, a seventh lens element L7 having positive power, and an eighth lens element L8 having positive power are provided.
- the fifth lens element L5 and the sixth lens element L6 are cemented lenses bonded with an adhesive or the like.
- the lens elements in the first lens group G1 will be described.
- the first lens element L1 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has a meniscus shape with a convex surface facing the object side.
- the second lens element L2 has an aspheric shape on the convex surface on the object side and the concave surface on the image surface side.
- the third lens element L3 has a meniscus shape with a convex surface facing the object side.
- the lens elements in the second lens group G2 will be described.
- the fourth lens element L4 has a meniscus shape with a concave surface facing the object side.
- the fifth lens element L5 has a biconvex shape.
- the sixth lens element L6 has a biconcave shape.
- the seventh lens element L7 has a biconvex shape.
- the seventh lens element L7 has an aspheric shape on the convex surface on the object side and the image surface side.
- the eighth lens element L8 has a meniscus shape with the convex surface facing the object side.
- the eighth lens element L8 has an aspheric shape on the convex surface on the object side and the concave surface on the image side.
- the zoom lens system during zooming from the wide-angle end to the telephoto end during imaging, the first lens group G1 moves to the image plane side, and the second lens group G2 and the image plane S do not move. That is, during zooming, the first lens group G1 is aligned with the optical axis so that the distance between the first lens group G1 and the second lens group G2 decreases and the distance between the second lens group G2 and the image plane S is constant. Move.
- the zoom lens system includes, in order from the object side to the image side, a first lens group G1 having a negative power and a second lens group G2 having a positive power.
- the first lens group G1 has at least two negative lenses.
- one of the first lens group G1 and the second lens group G2 is fixed with respect to the image plane S.
- the other of the first lens group G1 and the second lens group G2 moves along the optical axis.
- the angle of view changes as described above.
- the lens outer diameter can be reduced over the entire length.
- first lens group G1 is fixed and the second lens group G2 is movable, there is no length variation as the entire lens system, and the outer diameter of the lens can be reduced over the entire length.
- a mechanism for moving the relatively light second lens group G2 can be reduced in size and weight.
- the lens group arranged closest to the object side is fixed with respect to the lens frame 101 (see FIG. 13), thereby avoiding entry of foreign matters such as liquid and dust into the lens system (in the lens frame 101). Therefore, a zoom lens system that is compact and excellent in waterproofness and dustproofness can be realized.
- the zoom lens system can be used as a bifocal lens system only at the wide-angle end and the telephoto end.
- this bifocal lens system it is not necessary to consider the optical performance in the intermediate zoom range, so that it is easy to further improve the optical performance at the wide-angle end and the telephoto end.
- the total angle of view at the wide-angle end is 120 degrees or more.
- the position of the rear principal point with respect to the object side surface of L1 in the zoom lens system can be arranged closer to the object side, so that the optical total length can be shortened and the lens outer diameter can be reduced. Further, by fixing the third lens group G3 with respect to the image plane S, a new lens group driving mechanism is not required, and cost reduction and compactness can be maintained.
- the most object side of the first lens group G1 is preferably a lens element having negative power and a refractive index of 1.8 or more.
- the radius of curvature of the lens element can be increased.
- the inclination angle of the peripheral part of the lens element can be relaxed, it is possible to reduce the manufacturing difficulty of the lens element and reduce the cost.
- the said effect can be made more effective by making the refractive index of the said lens element into 1.9 or more further.
- the most image side of the first lens group G1 is a lens element having positive power and a refractive index of 1.9 or more.
- the said effect can be made more successful by making the refractive index of the said lens element into 2.0 or more further.
- the said effect can be made more successful by making the refractive index of the said lens element into 2.1 or more further.
- the second lens group G2 includes a cemented lens having negative power and satisfies the following condition (1).
- fG2 focal length of the second lens group G2 at the d-line
- fCL focal length at d-line of the cemented lens It is.
- Condition (1) is a condition for defining the power ratio of the cemented lens with respect to the second lens group G2.
- the power ratio of the cemented lens to the second lens group G2 becomes too large, and spherical aberration and coma increase in the entire zoom range from the wide-angle end to the telephoto end, and appropriate aberration correction is performed. It becomes difficult to secure desired optical performance.
- the upper limit of the condition (1) is exceeded, the power ratio of the cemented lens to the second lens group G2 becomes too small, causing an increase in the number of lens elements in the second lens group G2, and increasing the size of the zoom lens system. Will lead to.
- the cemented lens has a positive lens and a negative lens and satisfies the following condition (2).
- vp Abbe number of positive lens
- vn Abbe number of the negative lens
- the Abbe number may be represented by ⁇ , but in this specification and the claims, the Abbe number is expressed using v in order to match the description of the following surface data.
- Condition (2) is a condition for defining the ratio between the Abbe number of the positive lens and the Abbe number of the negative lens in the cemented lens having negative power.
- fG1 focal length of the first lens group G1 at the d-line
- fW focal length at the d-line at the wide-angle end
- wW half angle of view at the wide-angle end
- Condition (3) is a condition for defining the negative power of the first lens group G1. If the lower limit of the condition (3) is exceeded, the negative power of the first lens group G1 becomes too large, especially the curvature of field and astigmatism on the wide angle side increase, making it difficult to perform appropriate aberration correction. It becomes difficult to ensure desired optical performance. If the upper limit of the condition (3) is exceeded, the negative power of the first lens group G1 becomes too small, making it difficult to widen the entire angle of view at the wide-angle end, which increases the size of the zoom lens system. It will be connected.
- FIG. 13 shows a schematic configuration of an imaging apparatus 100 to which the zoom lens system according to Embodiment 1 is applied.
- the imaging apparatus 100 can output an optical image of an object as an electrical image signal, and is formed by a zoom lens system 201 that forms an optical image of the object, and the zoom lens system 201.
- An image sensor 202 that converts the optical image that has been converted into an electrical image signal, and a lens barrel 101 that houses the zoom lens system 201 are provided.
- the zoom lens system 201 includes a first lens group G1 held by the first group frame 211, a second lens group G2 held by the second group frame 212, and a parallel plate P.
- a controller (not shown) in the imaging apparatus 100 controls an actuator (not shown) during zooming to move the second lens group G2 via the second group frame 212.
- the imaging apparatus 100 includes the zoom lens system 201 according to the first embodiment.
- zoom lens system according to any one of Embodiments 2 to 5 may be applied instead of the zoom lens system according to Embodiment 1.
- FIG. 14 shows a schematic configuration of an imaging apparatus 100 to which the zoom lens system according to Embodiment 6 is applied.
- the imaging apparatus 100 can output an optical image of an object as an electrical image signal, and is formed by a zoom lens system 201 that forms an optical image of the object, and the zoom lens system 201.
- An image sensor 202 that converts the optical image that has been converted into an electrical image signal, and a lens barrel 101 that houses the zoom lens system 201 are provided.
- the zoom lens system 201 includes a first lens group G1 held by the first group frame 211, a second lens group G2 held by the second group frame 212, and a parallel plate P.
- a controller (not shown) in the imaging apparatus 100 controls an actuator (not shown) during zooming to move the first lens group G1 via the first group frame 211.
- the imaging apparatus 100 includes the zoom lens system 201 according to the sixth embodiment.
- FIG. 15 shows a schematic configuration of an imaging apparatus 100 to which the zoom lens system according to Embodiment 6 is applied.
- the imaging apparatus 100 can output an optical image of an object as an electrical image signal, and is formed by a zoom lens system 201 that forms an optical image of the object, and the zoom lens system 201.
- An image sensor 202 that converts the optical image that has been converted into an electrical image signal, and a lens barrel 101 that houses the zoom lens system 201 are provided.
- the imaging apparatus 100 includes a first lens group G1 held by a first group frame 211, a second lens group G2 held by a second group frame 212, a parallel plate P, and an imaging element 202.
- a controller (not shown) in the image pickup apparatus 100 controls an actuator (not shown) during zooming, and the second lens group G2, the parallel plate P, and the image pickup element via the second group frame 212. 202 is moved. That is, the distance between the second lens group G2 and the image sensor 202 is fixed, and the distance between the first lens group G1 and the image sensor 202 changes.
- the second lens group G2 can be fixedly held only at the two positions of the wide-angle end and the telephoto end.
- the distance from the imaging element 202 can be changed without moving the first lens group G1 with respect to the lens barrel 101, and zooming while ensuring the dustproof performance and waterproof performance of the lens barrel 101. It becomes possible to ensure the desired performance of the lens system.
- FIG. 16 shows a schematic configuration of a vehicle 500 to which the imaging device 100 according to Embodiments 7 to 9 is applied.
- the vehicle 500 receives an optical image formed by the zoom lens system 201 of the imaging device 100 and converts it into an electrical image signal, and a display device that displays the image signal converted by the imaging device 202.
- a memory (not shown) for recording an image signal, and a controller 300 for controlling the zoom position of the zoom lens system 201.
- the imaging device 100 is disposed behind the vehicle 500, for example, and images the rear of the vehicle.
- the controller 300 controls the zoom position of the zoom lens system 201 according to, for example, the advance / retreat of the vehicle and the vehicle speed.
- the zoom position of the zoom lens system 201 is controlled to the telephoto side and the telephoto end when moving forward, and to the wide-angle side and the wide-angle end when moving backward.
- the zoom position of the zoom lens system 201 is controlled to the telephoto side and the telephoto end during high speed operation, and to the wide angle side and the wide angle end during low speed operation.
- the image sensor 202 receives an optical image formed by the zoom lens system 201 and converts it into an electrical image signal.
- the image signal obtained by the image sensor 202 is displayed on, for example, the display device 401 or the display device 402 located in the front of the vehicle 500.
- the image signal is recorded in a memory as image data, for example.
- the display device 401 is, for example, an electronic room mirror.
- the display device 402 is, for example, a display device such as a navigation system or a front panel.
- the vehicle 500 can display the telephoto side image at the relatively far part and the wide-angle side image at the close part using the imaging device 100 having one optical system. Therefore, a passenger such as a driver can visually recognize the rear portion of the vehicle 500.
- the entire length of the lens barrel 101 can be fixed during zooming. This ensures the desired performance of the zoom lens system while ensuring the dustproof performance and waterproof performance of the lens barrel 101 even in a severe environment required when installed outside the vehicle compartment. It becomes possible. This facilitates installation outside the vehicle compartment.
- Embodiments 1 to 10 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments that have been changed, replaced, added, omitted, and the like. Also, it is possible to combine the constituent elements described in the first to tenth embodiments to form a new embodiment.
- a lens element having substantially no power may be appropriately added to the zoom lens systems of Embodiments 1 to 6.
- the zoom lens system capable of continuously changing the zoom position from the wide-angle end to the telephoto end has been described.
- the zoom lens system only needs to have a variable focal length. Therefore, the zoom lens system is not limited to a zoom lens system in which the focal length changes continuously.
- a zoom position of a part of the zoom lens systems according to Embodiments 1 to 6 may be used as a multifocal lens system that switches two or more focal lengths. Further, it may be used as a bifocal switching lens system for switching between two focal lengths of the wide angle end and the telephoto end.
- the zoom lens system is used as a two-focus switching lens system, it becomes unnecessary to consider the optical performance in the intermediate zoom range, so that the optical performance at the wide-angle end and the telephoto end can be further improved.
- a mechanism such as an actuator for switching the focal length can be simplified. Therefore, it is possible to provide an imaging device capable of switching the focal length even in a severe environment required for a vehicle or the like. In addition, it is possible to provide an imaging device that can move between two focal points at high speed. In addition, since it is not necessary to hold the zoom position at an intermediate focal length, power consumption can be suppressed.
- the imaging apparatus 100 that is disposed behind the vehicle 500 and images the rear of the vehicle has been described.
- the arrangement position of the imaging device 100 and the imaging direction are not limited to this.
- the imaging device 100 may be arranged at the position of so-called two side mirrors on the side surface of the vehicle, and the side surface of the vehicle and the rear side of the vehicle may be imaged instead of the side mirror.
- the zoom position of the zoom lens system 201 is controlled according to the advance / retreat of the vehicle and the vehicle speed, to the telephoto side when moving forward and to the wide angle side when moving backward. Thereby, the blind spot at the time of reverse drive, such as backward parking, can be reduced.
- the zoom positions of the two imaging devices 100 may be controlled in the same way, or only the imaging device 100 attached to the side mirror opposite to the driver's seat may be controlled to the wide angle side during parking. .
- It may be arranged on the inner surface of the windshield in the vehicle compartment (in front of the so-called room mirror) and image the front of the vehicle. Thereby, it can utilize as a sensing camera for a drive recorder or a driving support system.
- the units of length in the table are all “mm”, and the units of angle of view are all “°”.
- 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.
- Z distance from a point on the aspheric surface having a height h from the optical axis to the tangent plane of the aspheric vertex
- h height from the optical axis
- r vertex radius of curvature
- ⁇ conic constant
- An n-order aspherical coefficient.
- each longitudinal aberration diagram shows the aberration at the wide-angle end, and (b) shows the aberration at the telephoto end.
- Each longitudinal aberration diagram shows spherical aberration (SA (mm)), astigmatism (AST (mm)), and distortion (DIS (%)) in order from the top.
- the vertical axis represents the F number (indicated by F in the figure), the solid line is the d line (d-line), the short broken line is the F line (F-line), and the long broken line is the C line (C- line), the alternate long and short dash line is the characteristic of g-line.
- the vertical axis represents the image height
- the solid line is the sagittal plane (indicated by s)
- the broken line is the meridional plane (indicated by m).
- w represents a half angle of view.
- the vertical axis represents the image height
- w represents the half angle of view
- Half angle of view, wT is the half angle of view at the telephoto end).
- the zoom lens system includes a digital still camera, a digital video camera, a camera for a mobile phone device, a PDA (Personal Digital Assistance) camera, an in-vehicle camera, a sensing camera for checking a distance between other vehicles, a surveillance camera, and the like. It can be applied to WEB cameras and the like. In particular, it is suitable for a camera that requires a wide-angle lens such as an in-vehicle camera or a surveillance camera.
- a Aperture stop S Image plane (imaging device) DESCRIPTION OF SYMBOLS 100 Imaging device 101 Lens barrel 201 Zoom lens system 202 Imaging element 300 Controller 401 Display device 402 Display device 500 Vehicle
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Abstract
Description
図1、3、5、7、9、11は、各々実施の形態1~6に係るレンズ系のレンズ配置図であり、いずれも無限遠合焦状態にあるズームレンズ系を表している。
図1は、実施の形態1に係るズームレンズ系を表している。
図3は、実施の形態2に係るズームレンズ系を表している。
図5は、実施の形態3に係るズームレンズ系を表している。
図7は、実施の形態4に係るズームレンズ系を表している。
図9は、実施の形態5に係るズームレンズ系を表している。
図11は、実施の形態6に係るズームレンズ系を表している。
以下、例えば実施の形態1から6に係るズームレンズ系が満足することが可能な条件を説明する。なお、実施の形態1から6に係るズームレンズ系に対して、複数の可能な条件が規定されるが、これら複数の条件すべてを満足するズームレンズ系の構成が最も効果的である。しかしながら、個別の条件を満足することにより、それぞれ対応する効果を奏するズームレンズ系を得ることも可能である。
fG2:第2レンズ群G2のd線における焦点距離、
fCL:接合レンズのd線における焦点距離、
である。
fG2/fCL < -0.10・・・(1b)
fG2/fCL < -0.15・・・(1b)’
vp:正レンズのアッベ数、
vn:負レンズのアッベ数、
である。
vp/vn <3.5 ・・・(2b)
fG1:第1レンズ群G1のd線における焦点距離、
fW :広角端のd線における焦点距離、
wW :広角端の半画角、
である。
1/(fG1/(2×fW×tan(wW/2)))<-0.9・・・(3b)
図13は、実施の形態1に係るズームレンズ系を適用した撮像装置100の概略構成を示す。
図14は、実施の形態6に係るズームレンズ系を適用した撮像装置100の概略構成を示す。
図15は、実施の形態6に係るズームレンズ系を適用した撮像装置100の概略構成を示す。
図16は、実施の形態7~9に係る撮像装置100を適用した車両500の概略構成を示す。車両500は、撮像装置100のズームレンズ系201によって形成される光学像を受光して、電気的な画像信号に変換する撮像素子202と、撮像素子202によって変換された画像信号を表示する表示装置401と、画像信号を記録するメモリ(図示せず)と、ズームレンズ系201のズーム位置を制御するコントローラ300と、を備える。
以上のように、本出願において開示する技術の例示として、実施の形態1~10を説明した。しかしながら、本開示における技術は、これに限定されず、変更、置き換え、付加、省略などを行った実施の形態にも適用できる。また、上記実施の形態1~10で説明した各構成要素を組み合わせて、新たな実施の形態とすることも可能である。
以下、実施の形態1~6に係るズームレンズ系の数値実施例を説明する。なお、数値実施例において、表中の長さの単位はすべて「mm」であり、画角の単位はすべて「°」である。また、各数値実施例において、rは曲率半径、dは面間隔、ndはd線に対する屈折率、vdはd線に対するアッベ数、である。また、各数値実施例において、*印を付した面は非球面であり、非球面形状は次式で定義している。
Z:光軸からの高さがhの非球面上の点から、非球面頂点の接平面までの距離、
h:光軸からの高さ、
r:頂点曲率半径、
κ:円錐定数、
An:n次の非球面係数
である。
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各種データをデータ1に示す。
面データ
面番号 r d nd vd
物面 ∞
1 11.84800 1.00000 2.00100 29.1
2 4.84380 3.53750
3* -24.49860 0.70000 1.80998 40.9
4* 2.77250 1.02990
5 5.33230 0.61240 2.10420 17.0
6 10.71420 可変
7 6.98800 0.47500 1.84666 23.8
8 -10.61710 0.10000
9(絞り) ∞ 0.36510
10* 4.41890 1.49180 1.68893 31.1
11 -1.97030 0.00500 1.56732 42.8
12 -1.97030 0.70000 2.00272 19.3
13 5.07480 0.59380
14 6.09700 1.76240 1.60311 60.7
15 -5.06070 0.10920
16* 4.92620 1.00000 2.00272 19.3
17* 4.85440 可変
18 ∞ 0.70000 1.51680 64.2
19 ∞ 0.10000
20 ∞ BF
像面 ∞
非球面データ
第3面
K= 0.00000E+00, A4=-1.42010E-03, A6= 2.12200E-04, A8=-7.06042E-06
A10= 1.81078E-08
第4面
K=-1.83138E-03, A4=-5.38722E-03, A6= 6.69074E-04, A8=-6.39084E-06
A10=-2.00828E-06
第10面
K= 0.00000E+00, A4= 5.64426E-03, A6=-1.00646E-02, A8= 2.26343E-02
A10=-1.38613E-02
第16面
K=-8.78920E-01, A4= 3.45772E-03, A6=-8.57563E-04, A8=-3.31787E-05
A10=-3.64830E-06
第17面
K= 9.51784E-01, A4= 7.70165E-03, A6=-1.65490E-03, A8=-3.03580E-05
A10= 1.67798E-10
各種データ
ズーム比 2.65369
広角 望遠
焦点距離 1.6603 4.4060
Fナンバー 4.00183 6.24434
画角 101.0000 36.8610
像高 2.5662 3.0000
レンズ全長 21.0000 21.0000
BF 0.00000 0.00000
d6 4.4335 0.1004
d17 2.2844 6.6175
入射瞳位置 4.4811 3.9741
射出瞳位置 -7.8866 -12.2197
前側主点位置 5.7924 6.7902
後側主点位置 19.3496 16.5840
単レンズデータ
レンズ 始面 焦点距離
1 1 -8.8149
2 3 -3.0400
3 5 9.0720
4 7 5.0398
5 10 2.1862
6 12 -1.3483
7 14 4.8748
8 16 55.6072
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 -2.71096 6.87980 2.47801 4.01573
2 7 4.25863 6.60230 1.20346 2.59129
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.61246 -1.62527
数値実施例2のズームレンズ系は、図3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各種データをデータ2に示す。
面データ
面番号 r d nd vd
物面 ∞
1 16.74040 1.00000 1.91082 35.2
2 6.19370 4.97660
3* -117.52060 1.04030 1.80998 40.9
4* 2.00090 1.35170
5 6.75820 1.15720 2.10420 17.0
6 32.80640 可変
7* 3.40560 1.04000 1.83918 23.9
8* 6.90940 0.50000
9(絞り) ∞ 0.22230
10 4.03370 1.43240 1.58913 61.3
11 -2.50000 0.00500 1.56732 42.8
12 -2.50000 0.95580 1.94595 18.0
13 14.32650 1.16490
14* 3.33750 1.28200 1.68893 31.1
15* 10.20320 可変
16* 6.86050 1.38800 1.77200 50.0
17* -8.62460 0.70200
18 ∞ 0.70000 1.51680 64.2
19 ∞ 0.10000
20 ∞ BF
像面 ∞
非球面データ
第3面
K= 5.00000E+02, A4=-3.79945E-03, A6= 2.91587E-04, A8=-1.08682E-05
A10= 1.63700E-07
第4面
K=-7.45380E-01, A4=-1.34302E-02, A6= 3.56576E-04, A8= 1.22068E-05
A10=-2.64577E-06
第7面
K=-1.28353E+00, A4= 6.42054E-03, A6= 9.77481E-04, A8=-7.63095E-05
A10= 5.64541E-05
第8面
K= 0.00000E+00, A4= 4.43274E-03, A6= 1.03201E-03, A8= 5.21289E-05
A10= 9.29893E-05
第14面
K= 2.14915E-01, A4= 1.44982E-03, A6=-6.08124E-04, A8= 1.81920E-05
A10= 9.93346E-07
第15面
K= 0.00000E+00, A4= 1.39849E-02, A6=-1.33576E-04, A8=-7.23755E-06
A10=-5.93264E-11
第16面
K= 0.00000E+00, A4=-4.42218E-04, A6= 2.53741E-04, A8=-5.72403E-05
A10= 4.81152E-07
第17面
K= 3.64412E+00, A4= 9.39007E-03, A6=-6.03189E-04, A8=-6.02825E-06
A10= 1.64038E-07
各種データ
ズーム比 3.01341
広角 望遠
焦点距離 0.9947 2.9974
Fナンバー 2.06113 3.66045
画角 101.0000 35.8360
像高 1.9208 2.2000
レンズ全長 25.8394 25.8394
BF 0.00000 0.00000
d6 6.2212 0.3000
d15 0.6000 6.5212
入射瞳位置 5.4543 5.1208
射出瞳位置 553.7391 7.8774
前側主点位置 6.4507 9.2579
後側主点位置 24.8429 22.8366
単レンズデータ
レンズ 始面 焦点距離
1 1 -11.3045
2 3 -2.4195
3 5 7.5328
4 7 7.0482
5 10 2.8516
6 12 -2.1897
7 14 6.6899
8 16 5.1507
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 -2.58954 9.52580 3.33477 5.46256
2 7 5.10700 6.60240 1.09978 2.08766
3 16 5.15068 2.79000 0.36113 1.17251
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.57597 -1.73380
3 16 0.66690 0.66761
数値実施例3のズームレンズ系は、図5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各種データをデータ3に示す。
面データ
面番号 r d nd vd
物面 ∞
1 11.24800 0.50000 2.00100 29.1
2 3.74730 2.80710
3* -33.53600 0.50000 1.80998 40.9
4* 2.90790 0.22950
5 3.25080 0.50000 2.10420 17.0
6 5.32250 可変
7 3.90160 0.56720 1.84666 23.9
8 86.51630 0.26770
9(絞り) ∞ 0.26770
10* 6.17720 0.86130 1.68893 31.1
11 -3.00710 0.00600 1.56732 42.8
12 -3.00710 0.30000 2.00272 19.3
13 5.69970 0.30000
14 21.09680 0.83790 1.63854 55.4
15 -3.18920 0.30000
16 4.89670 0.53330 1.88300 40.8
17 7.42220 可変
18* -5.78950 1.00000 1.82115 24.1
19* -10.25850 0.92060
20 ∞ 0.70000 1.51680 64.2
21 ∞ 0.10000
22 ∞ BF
像面 ∞
非球面データ
第3面
K= 0.00000E+00, A4=-3.46699E-03, A6= 3.04731E-04, A8=-1.43458E-05
A10= 1.21014E-07
第4面
K= 0.00000E+00, A4=-2.87134E-03, A6= 3.17550E-04, A8=-3.77317E-07
A10=-1.99125E-06
第10面
K= 0.00000E+00, A4=-8.28749E-03, A6= 1.02678E-02, A8=-1.66571E-02
A10= 8.96180E-03
第18面
K= 0.00000E+00, A4=-1.27485E-02, A6= 1.01248E-04, A8=-9.31178E-07
A10=-1.81223E-09
第19面
K= 0.00000E+00, A4=-8.03080E-03, A6= 3.49428E-04, A8= 3.05150E-10
A10= 5.41456E-13
各種データ
ズーム比 2.48192
広角 望遠
焦点距離 1.7766 4.4094
Fナンバー 3.50302 5.21491
画角 101.0000 36.8240
像高 2.5207 3.0000
レンズ全長 17.0000 17.0000
BF 0.00000 0.00000
d6 3.6539 0.3000
d17 1.8478 5.2017
入射瞳位置 3.2625 2.7955
射出瞳位置 -6.3929 -8.2832
前側主点位置 4.5458 4.8548
後側主点位置 15.2286 12.5806
単レンズデータ
レンズ 始面 焦点距離
1 1 -5.8075
2 3 -3.2835
3 5 6.7134
4 7 4.8107
5 10 3.0525
6 12 -1.9299
7 14 4.3978
8 16 14.8293
9 18 -18.0004
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 -2.41674 4.53660 1.54386 2.89637
2 7 3.55644 4.24110 1.45993 1.97809
3 18 -18.00045 2.62060 -0.79118 -0.16340
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.63345 -1.57333
3 18 1.16051 1.15967
数値実施例4のズームレンズ系は、図7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各種データをデータ4に示す。
面データ
面番号 r d nd vd
物面 ∞
1 16.86450 1.24030 2.00100 29.1
2 5.39730 5.18340
3* -104.42160 0.76620 1.80470 41.0
4* 1.81790 1.05190
5 5.19710 1.73310 2.10420 17.0
6 30.22860 可変
7* 3.79340 2.23200 1.95150 29.8
8* 67.17270 0.10070
9(絞り) ∞ 0.25990
10* -7.99430 0.37550 1.77200 50.0
11 -1.84450 0.00500 1.56732 42.8
12 -1.84450 0.30000 2.00272 19.3
13 77.57730 0.30660
14 15.27490 0.52240 1.58144 40.9
15 -3.59930 可変
16* 8.03530 1.48470 1.80998 40.9
17* -4.48550 0.90360
18 ∞ 0.70000 1.51680 64.2
19 ∞ 0.10000
20 ∞ BF
像面 ∞
非球面データ
第3面
K= 6.00000E+02, A4=-5.37061E-03, A6= 4.61858E-04, A8=-2.02896E-05
A10= 4.05338E-07, A12= 4.52849E-21
第4面
K=-7.24800E-01, A4=-1.92756E-02, A6= 5.70648E-04, A8= 2.40775E-05
A10=-6.23575E-06, A12= 0.00000E+00
第7面
K=-4.28166E+00, A4= 1.01131E-02, A6=-3.21492E-03, A8= 1.67172E-03
A10=-4.19872E-04, A12= 0.00000E+00
第8面
K= 0.00000E+00, A4=-1.72318E-02, A6=-1.61759E-02, A8= 3.67025E-02
A10=-2.97330E-02, A12= 0.00000E+00
第10面
K= 4.87200E+01, A4=-2.64065E-02, A6=-5.66206E-03, A8= 1.67805E-01
A10=-3.93868E-01, A12= 0.00000E+00
第16面
K=-2.64392E-01, A4=-1.84968E-03, A6= 6.39550E-04, A8=-1.09790E-04
A10= 1.56268E-06, A12= 0.00000E+00
第17面
K=-3.34123E-02, A4= 1.36615E-02, A6=-7.07646E-04, A8=-1.51665E-05
A10=-6.33150E-10, A12= 0.00000E+00
各種データ
ズーム比 2.11026
広角 望遠
焦点距離 0.8650 1.8254
Fナンバー 4.00617 6.04085
画角 110.0000 52.6990
像高 1.8872 2.2000
レンズ全長 24.0837 24.0837
BF 0.00000 0.00000
d6 4.8260 1.0260
d15 1.9924 5.7924
入射瞳位置 5.0040 4.8332
射出瞳位置 39.9255 5.3545
前側主点位置 5.8877 7.2806
後側主点位置 23.2181 22.2556
単レンズデータ
レンズ 始面 焦点距離
1 1 -8.3833
2 3 -2.2133
3 5 5.4846
4 7 4.1541
5 10 3.0254
6 12 -1.7934
7 14 5.0613
8 16 3.7531
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 -2.38521 9.97490 3.04616 5.68367
2 7 4.97448 4.10210 0.70178 1.62063
3 16 3.75307 3.08830 0.55592 1.41287
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.68806 -1.45040
3 16 0.52708 0.52766
数値実施例5のズームレンズ系は、図9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各種データをデータ5に示す。
面データ
面番号 r d nd vd
物面 ∞
1 9.84940 1.00000 1.80420 46.5
2 3.62380 2.64570
3* -16.47510 0.70000 1.80470 41.0
4* 3.33100 0.14940
5 3.71630 0.96250 1.92286 20.9
6 8.95550 可変
7 4.62710 0.68800 2.00069 25.5
8 -64.73000 0.26770
9(絞り) ∞ 0.26770
10* 10.82360 1.54760 1.68400 31.3
11 -2.10890 0.00500 1.56732 42.8
12 -2.10890 0.30000 2.00272 19.3
13 5.79530 0.34390
14 11.95000 1.73170 1.62041 60.3
15 -3.60450 0.28450
16 5.63440 1.00000 1.84666 23.8
17 11.94950 可変
18* 39.57050 0.80000 1.52996 55.8
19* 9.72580 0.85240
20 ∞ 0.70000 1.51680 64.2
21 ∞ 0.10000
22 ∞ BF
像面 ∞
非球面データ
第3面
K= 0.00000E+00, A4=-3.27472E-03, A6= 4.49639E-04, A8=-1.56421E-05
A10= 3.34798E-08
第4面
K= 0.00000E+00, A4=-3.59758E-03, A6= 3.19579E-04, A8= 1.88341E-06
A10= 4.17795E-06
第10面
K= 0.00000E+00, A4=-8.54935E-04, A6= 4.91496E-04, A8=-2.83361E-05
A10=-8.00107E-05
第18面
K= 0.00000E+00, A4=-2.53677E-02, A6= 1.24470E-03, A8= 1.55834E-04
A10=-9.14708E-06
第19面
K= 0.00000E+00, A4=-2.80105E-02, A6= 1.84426E-03, A8= 8.35264E-05
A10= 5.03781E-07
各種データ
ズーム比 1.90653
広角 望遠
焦点距離 2.3504 4.4811
Fナンバー 3.00150 3.78383
画角 72.0000 36.0100
像高 3.0000 3.0000
レンズ全長 19.6191 19.6191
BF 0.00000 0.00000
d6 3.2530 0.3000
d17 2.0200 4.9730
入射瞳位置 4.1457 3.5819
射出瞳位置 -8.3922 -9.7595
前側主点位置 5.8386 6.0050
後側主点位置 17.2788 15.1357
単レンズデータ
レンズ 始面 焦点距離
1 1 -7.6788
2 3 -3.3898
3 5 6.3256
4 7 4.3369
5 10 2.7122
6 12 -1.5133
7 14 4.6623
8 16 11.7400
9 18 -24.5605
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 -3.09459 5.45760 2.15046 3.80042
2 7 4.48578 6.43610 2.68818 2.61965
3 18 -24.56054 2.35240 0.69979 1.21050
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.72268 -1.37847
3 18 1.05098 1.05047
数値実施例6のズームレンズ系は、図11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各種データをデータ6に示す。
面データ
面番号 r d nd vd
物面 ∞
1 20.00000 0.70000 1.80420 46.5
2 8.77570 0.10000
3* 7.76790 1.00000 1.80998 40.9
4* 4.60710 0.75370
5 2.88030 1.07000 2.10420 17.0
6 2.96510 可変
7 -3.35580 1.02520 1.92286 20.9
8 -2.84150 0.14070
9(絞り) ∞ 0.36690
10 1.90680 0.85690 1.68893 31.1
11 -1.28440 0.00500 1.56732 42.8
12 -1.28440 0.34430 2.00272 19.3
13 3.37150 0.53170
14* 14.38460 1.80220 2.00100 29.1
15* -2.39950 0.10050
16* 21.92630 0.70000 2.00272 19.3
17* 624.27740 0.91610
18 ∞ 0.70000 1.51680 64.2
19 ∞ 0.10000
20 ∞ BF
像面 ∞
非球面データ
第3面
K= 0.00000E+00, A4= 6.76079E-03, A6=-3.73238E-04, A8=-1.61278E-05
A10=-3.86062E-06, A12= 2.95204E-07, A14= 0.00000E+00
第4面
K= 1.25412E+00, A4= 9.14039E-03, A6= 3.64079E-04, A8=-3.39362E-04
A10=-2.13213E-07, A12= 2.02615E-06, A14= 0.00000E+00
第14面
K=-1.27119E+01, A4= 1.15476E-04, A6=-1.03669E-03, A8=-2.21666E-04
A10= 1.95387E-05, A12= 1.12181E-05, A14=-3.21579E-06
第15面
K=-1.21834E-01, A4= 3.37989E-03, A6= 8.11476E-04, A8= 7.24892E-05
A10= 3.92881E-06, A12= 1.17555E-07, A14=-8.13431E-07
第16面
K=-4.61155E+01, A4= 7.25744E-03, A6=-1.39294E-03, A8= 4.99065E-04
A10=-4.53181E-05, A12= 0.00000E+00, A14= 0.00000E+00
第17面
K= 2.48354E+04, A4= 2.99111E-02, A6=-2.66720E-03, A8= 1.27313E-03
A10=-1.41195E-04, A12= 0.00000E+00, A14= 0.00000E+00
各種データ
ズーム比 1.07066
広角 望遠
焦点距離 2.3438 2.5094
Fナンバー 5.60771 5.60501
画角 60.0000 40.0000
像高 2.4002 2.4001
レンズ全長 13.0733 11.7132
BF 0.00000 0.00000
d6 1.8601 0.5000
入射瞳位置 5.0030 3.6123
射出瞳位置 40.9169 40.9169
前側主点位置 7.4811 6.2756
後側主点位置 10.7195 9.2138
単レンズデータ
レンズ 始面 焦点距離
1 1 -20.0001
2 3 -16.2840
3 5 11.9674
4 7 10.2675
5 10 1.2510
6 12 -0.8944
7 14 2.1710
8 16 22.6496
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 -19.99686 3.62370 4.54374 5.58703
2 7 2.41553 7.48950 3.13041 4.88092
ズームレンズ群倍率
群 始面 広角 望遠
1 1 0.00000 0.00000
2 7 -0.11721 -0.12549
以下の表に、各数値実施例の対応値を示す。
G2 第2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
P 平行平板
A 開口絞り
S 像面(撮像素子)
100 撮像装置
101 レンズ鏡筒
201 ズームレンズ系
202 撮像素子
300 コントローラ
401 表示装置
402 表示装置
500 車両
Claims (12)
- 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、
を備え、
前記第1レンズ群は少なくとも2枚の負レンズを有し、
ズーミング動作時には、前記第1レンズ群、および、前記第2レンズ群の一方は、像面に対して固定され、他方は、光軸に沿って移動することに伴い画角が変化する、
ズームレンズ系。 - ズーミング動作時には、前記第1レンズ群が像面に対して固定され、
前記第2レンズ群が光軸に沿った移動をする、
請求項1に記載のズームレンズ系。 - 広角端の全画角が120度以上である、
請求項1に記載のズームレンズ系。 - 正のパワーを有する第3レンズ群をさらに有し、
前記第3レンズ群は像面に対して固定されている、
請求項1に記載のズームレンズ系。 - 負のパワーを有する第3レンズ群をさらに有し
前記第3レンズ群は像面に対して固定されている、
請求項1に記載のズームレンズ系。 - 前記第1レンズ群の最も物体側は、負のパワーを有し、屈折率が1.8以上のレンズ素子である、
請求項1に記載のズームレンズ系。 - 前記第1レンズ群の最も像側は、正のパワーを有し、屈折率が1.9以上のレンズ素子である、
請求項1に記載のズームレンズ系。 - 前記第2レンズ群は、負のパワーを有する接合レンズを備え、
以下の条件(1)を満足する、請求項1に記載のズームレンズ系:
-1.50 < fG2/fCL < -0.05・・・(1)
ここで、
fG2:第2レンズ群のd線における焦点距離、
fCL:前記接合レンズのd線における焦点距離、
である。 - 前記接合レンズは、
正のパワーを有するレンズ素子と、
負のパワーを有するレンズ素子と、
を有し、
以下の条件(2)を満足する、請求項8に記載のズームレンズ系:
1.0 < vp/vn < 4.0・・・(2)
ここで、
vp:正レンズのアッベ数、
vn:負レンズのアッベ数、
である。 - 以下の条件(3)を満足する、請求項1に記載のズームレンズ系:
-2.0<1/(fG1/(2×fW×tan(wW/2)))<-0.5・・・(3)
ここで、
fG1:第1レンズ群のd線における焦点距離、
fW :広角端のd線における焦点距離、
wW :広角端の半画角、
である。 - 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、
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、
を備え、
前記第1レンズ群は少なくとも2枚の負レンズを有し、
ズーミング動作時には、前記第1レンズ群、および、前記第2レンズ群の一方は、像面に対して固定され、他方は、光軸に沿って移動することに伴い画角が変化する、
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録の少なくとも一方を行う車両であって、
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、
前記ズームレンズ系のズーム位置を制御するコントローラと、
を備え、
前記ズームレンズ系が、物体側から像側へと順に、
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、
を備え、
前記第1レンズ群は少なくとも2枚の負レンズを有し、
ズーミング動作時には、前記第1レンズ群、および、前記第2レンズ群の一方は、像面に対して固定され、他方は、光軸に沿って移動することに伴い画角が変化する、
車両。
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CN117075307B (zh) * | 2023-10-17 | 2024-01-12 | 宁波永新光学股份有限公司 | 一种后视镜光学系统 |
Also Published As
Publication number | Publication date |
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EP3422070A4 (en) | 2019-02-27 |
CN108604001B (zh) | 2020-12-15 |
JP6611061B2 (ja) | 2019-11-27 |
JPWO2017145208A1 (ja) | 2018-08-16 |
EP3422070A1 (en) | 2019-01-02 |
EP3422070B1 (en) | 2020-09-09 |
US20180326909A1 (en) | 2018-11-15 |
CN108604001A (zh) | 2018-09-28 |
US10967794B2 (en) | 2021-04-06 |
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