WO2015072094A1 - 単焦点レンズ系、カメラ及び自動車 - Google Patents
単焦点レンズ系、カメラ及び自動車 Download PDFInfo
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- WO2015072094A1 WO2015072094A1 PCT/JP2014/005414 JP2014005414W WO2015072094A1 WO 2015072094 A1 WO2015072094 A1 WO 2015072094A1 JP 2014005414 W JP2014005414 W JP 2014005414W WO 2015072094 A1 WO2015072094 A1 WO 2015072094A1
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- lens element
- cemented
- single focus
- lens
- focus lens
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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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
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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
- G02B13/04—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
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/10—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of camera system used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/8046—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for replacing a rear-view mirror system
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/04—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only
Definitions
- the present disclosure relates to a single focus lens system, a camera, and an automobile.
- Patent Document 1 discloses a wide-angle lens system in which the shape, arrangement, etc. of each lens are optimized with a relatively small number of lenses of six as a whole.
- This disclosure provides a single-focus lens system that has a sufficiently wide angle, is compact, and has good temperature characteristics.
- the present disclosure also provides a camera including the single focus lens system and an automobile including the camera.
- the single focus lens system in the present disclosure is: In order from the object side to the image side, the first group, the aperture stop, and the second group,
- the second group includes a cemented lens element having a positive power, and a cemented surface of the cemented lens element is an aspheric surface,
- the cemented lens element has the following condition (1):
- MAX The maximum value in absolute value of the relative refractive index temperature coefficient in air of 0 to 20 ° C. with respect to light in the wavelength region of 580 to 640 nm, obtained for each lens element constituting the cemented lens element. is there) It is characterized by satisfying.
- the camera in the present disclosure is A single focus lens system, An image sensor that images light collected by the single focus lens system;
- the single focus lens system is: In order from the object side to the image side, the first group, the aperture stop, and the second group,
- the second group includes a cemented lens element having a positive power, and a cemented surface of the cemented lens element is an aspheric surface,
- the cemented lens element has the following condition (1):
- MAX The maximum value in absolute value of the relative refractive index temperature coefficient in air of 0 to 20 ° C. with respect to light in the wavelength region of 580 to 640 nm, obtained for each lens element constituting the cemented lens element. is there) It is a single focus lens system satisfying the above.
- the automobile in this disclosure is A camera, A processing unit that detects an external environment based on a captured image obtained by an image sensor provided in the camera and controls each unit;
- the camera In order from the object side to the image side, the first group, the aperture stop, and the second group,
- the second group includes a cemented lens element having a positive power, and a cemented surface of the cemented lens element is an aspheric surface,
- the cemented lens element has the following condition (1):
- MAX The maximum value in absolute value of the relative refractive index temperature coefficient in air of 0 to 20 ° C.
- a single focus lens system that satisfies It is a camera provided with the image pick-up element which images the light condensed with the said single focus lens system.
- the single focus lens system in the present disclosure has a very wide angle of view with a diagonal angle of about 150 ° or more, and is small in size, but has optical characteristics even when the temperature changes in a range of about 20 to 80 ° C., for example. Little change and excellent temperature characteristics.
- FIG. 1 is a lens arrangement diagram illustrating an infinitely focused state of a single focus lens system according to Embodiment 1 (Numerical Example 1).
- FIG. 2 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 1 in the infinite focus state.
- FIG. 3 is a lens arrangement diagram illustrating an infinitely focused state of the single focus lens system according to Embodiment 2 (Numerical Example 2).
- FIG. 4 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 2 when the lens is in focus at infinity.
- FIG. 5 is a lens arrangement diagram illustrating an infinitely focused state of the single focus lens system according to Embodiment 3 (Numerical Example 3).
- FIG. 6 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 3 in the infinite focus state.
- FIG. 7 is a lens arrangement diagram illustrating an infinitely focused state of a single focus lens system according to Embodiment 4 (Numerical Example 4).
- FIG. 8 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 4 when the lens is in focus at infinity.
- FIG. 9 is a lens arrangement diagram illustrating an infinitely focused state of the single focus lens system according to Embodiment 5 (Numerical Example 5).
- FIG. 10 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 5 in the infinite focus state.
- FIG. 10 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 5 in the infinite focus state.
- FIG. 11 is a lens arrangement diagram illustrating an infinitely focused state of the single focus lens system according to Embodiment 6 (Numerical Example 6).
- FIG. 12 is a longitudinal aberration diagram of the single focus lens system according to Numerical Example 6 in the infinitely focused state.
- FIG. 13 is a schematic diagram of an in-vehicle camera provided with the single focus lens system according to Embodiment 1 and an automobile provided with the in-vehicle camera at a rear position of the vehicle.
- FIG. 14 is a schematic diagram showing a determination location of whether or not the vehicle rearward view is possible based on an image of the in-vehicle camera and a range including the same in an automobile having the in-vehicle camera at the rear side position of the vehicle.
- the first group is a group composed of at least one lens element
- the second group is a group composed of at least two lens elements, and the lens elements constituting the group Depending on the type, number, arrangement, etc., power, composite focal length, etc. are determined for each group.
- FIGS. 1, 3, 5, 7, 9, and 11 are lens arrangement diagrams of the single-focus lens systems according to Embodiments 1 to 6, respectively, each representing a single-focus lens system in an infinite focus state. Yes.
- an asterisk * attached to a specific surface indicates that the surface is aspherical.
- the straight line described on the rightmost side represents the position of the image plane S.
- a parallel plate CG is provided on the object side of the image plane S.
- the single focus lens system according to Embodiment 1 includes, in order from the object side to the image side, a first lens element L1, a second lens element L2, a third lens element L3, and an aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of a resin having a negative power, and is a biconcave lens element.
- the concave surfaces on the object side and the image side are aspheric surfaces.
- the concave surface on the image side is an aspheric surface whose negative power is weakened as the distance from the optical axis increases.
- the third lens element L3 is a lens element made of a resin having a positive power, and is a biconvex lens element.
- the object-side and image-side convex surfaces are aspheric surfaces.
- the convex surface on the object side is an aspheric surface in which positive power increases as the distance from the optical axis increases.
- the convex surface on the image side is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the fifth lens element L5 is a lens element made of glass having a positive power, and is a biconvex lens element.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the convex surface on the object side of the fourth lens element L4 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the cemented surface between the fourth lens element L4 and the fifth lens element L5 is an aspherical surface with a convex surface facing the object side and the power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the single focus lens system according to Embodiment 2 includes, in order from the object side to the image side, a first lens element L1, a second lens element L2, a third lens element L3, and an aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of glass having a negative power, and is a biconcave lens element.
- the third lens element L3 is a lens element made of glass having positive power, and is a biconvex lens element.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having positive power, and is a biconvex lens element.
- the fifth lens element L5 is a lens element made of glass having negative power, and is a negative meniscus lens element having a concave surface facing the object side.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the convex surface on the object side of the fourth lens element L4 is an aspheric surface whose positive power increases as the distance from the optical axis increases.
- the cemented surface of the fourth lens element L4 and the fifth lens element L5 is an aspherical surface having a convex surface facing the image side and whose power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the single focus lens system according to Embodiment 3 includes, in order from the object side to the image side, the first lens element L1, the second lens element L2, the third lens element L3, and the aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the third lens element L3 is a lens element made of glass having positive power, and is a biconvex lens element.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the fifth lens element L5 is a lens element made of glass having a positive power, and is a biconvex lens element.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the convex surface on the object side of the fourth lens element L4 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the cemented surface between the fourth lens element L4 and the fifth lens element L5 is an aspherical surface with a convex surface facing the object side and the power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the single focus lens system according to Embodiment 4 includes, in order from the object side to the image side, a first lens element L1, a second lens element L2, a third lens element L3, and an aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of a resin having a negative power, and is a biconcave lens element.
- the concave surfaces on the object side and the image side are aspheric surfaces.
- the concave surface on the object side is an aspheric surface whose negative power is weakened as the distance from the optical axis increases.
- the concave surface on the image side is an aspheric surface whose negative power is weakened as the distance from the optical axis increases.
- the third lens element L3 is a lens element made of a resin having a positive power, and is a biconvex lens element.
- the object-side and image-side convex surfaces are aspheric surfaces.
- the convex surface on the object side is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the fifth lens element L5 is a lens element made of glass having a positive power, and is a biconvex lens element.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the convex surface on the object side of the fourth lens element L4 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the cemented surface between the fourth lens element L4 and the fifth lens element L5 is an aspherical surface with a convex surface facing the object side and the power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the single focus lens system according to Embodiment 5 includes, in order from the object side to the image side, a first lens element L1, a second lens element L2, a third lens element L3, and an aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of a resin having a negative power, and is a biconcave lens element.
- the concave surfaces on the object side and the image side are aspheric surfaces.
- the concave surface on the object side is an aspheric surface whose negative power is weakened as the distance from the optical axis increases.
- the concave surface on the image side is an aspheric surface whose negative power is weakened as the distance from the optical axis increases.
- the third lens element L3 is a lens element made of a resin having a positive power, and is a biconvex lens element.
- the object-side and image-side convex surfaces are aspheric surfaces.
- the convex surface on the object side is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the fifth lens element L5 is a lens element made of glass having a positive power, and is a biconvex lens element.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the cemented surface between the fourth lens element L4 and the fifth lens element L5 is an aspherical surface with a convex surface facing the object side and the power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- the single focus lens system according to Embodiment 6 includes, in order from the object side to the image side, a first lens element L1, a second lens element L2, a third lens element L3, and an aperture. It comprises a stop A and a cemented lens element composed of a fourth lens element L4 and a fifth lens element L5.
- the first lens element L1, the second lens element L2, and the third lens element L3 constitute a first group, and the cemented lens element constitutes a second group.
- the first lens element L1 is a lens element made of glass having negative power, and is a negative meniscus lens element having a convex surface facing the object side.
- the second lens element L2 is a lens element made of glass having a negative power, and is a biconcave lens element.
- the third lens element L3 is a lens element made of glass having positive power, and is a biconvex lens element.
- the fourth lens element L4 and the fifth lens element L5 are cemented and have positive power.
- the fourth lens element L4 is a lens element made of glass having positive power, and is a biconvex lens element.
- the fifth lens element L5 is a lens element made of glass having negative power, and is a negative meniscus lens element having a concave surface facing the object side.
- the convex surface on the object side of the fourth lens element L4, the cemented surface of the fourth lens element L4 and the fifth lens element L5, and the convex surface on the image side of the fifth lens element L5 are aspheric.
- the convex surface on the object side of the fourth lens element L4 is an aspheric surface whose positive power increases as the distance from the optical axis increases.
- the cemented surface of the fourth lens element L4 and the fifth lens element L5 is an aspherical surface having a convex surface facing the image side and whose power decreases as the distance from the optical axis increases.
- the convex surface on the image side of the fifth lens element L5 is an aspheric surface in which the positive power decreases as the distance from the optical axis increases.
- Embodiments 1 to 6 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 an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed.
- the material of the cemented lens element exemplified in Embodiments 1 to 6 can be used instead of the material of the cemented lens element exemplified in Embodiments 1 to 6, the following materials can be used. This is because the relative refractive index temperature coefficient in the air of 0 to 20 ° C. with respect to light in the wavelength region of 580 to 640 nm satisfies a predetermined condition described later. Note that the present invention is not limited to these, and various materials can be used as long as they meet the purpose.
- Glass type name M-FDS2, M-FDS1, M-FDS910, manufactured by HOYA Corporation M-FD80, M-NBFD10, M-TAFD307 I. Made by Sumita Optical Glass Co., Ltd. Glass name: K-PSFn203, K-PSFn2, K-PSFn5, K-PSFn1, K-PSFn4, K-PSFn3, K-VC91, K-VC90, K-ZnSF8, K-PG395, K-CD45, K-CD120 C. OHARA CO., LTD. Glass name: L-BBH1, L-BBH2, L-NBH54, L-TIH53, L-LAH86, L-TIM28
- a single focus lens system such as the single focus lens systems according to Embodiments 1 to 6
- a plurality of useful conditions are defined for the single focus lens system according to each embodiment, but the configuration of the single focus lens system that satisfies all of the plurality of conditions is most effective.
- individual conditions it is also possible to obtain a single focus lens system that exhibits the corresponding effects.
- the single focus lens system according to the present disclosure includes a first group, an aperture stop, and a second group in order from the object side to the image side.
- the second group includes a cemented lens element having a positive power, and a cemented surface of the cemented lens element is an aspherical surface.
- this lens configuration is referred to as a basic configuration of the embodiment.
- the cemented lens element in the second group satisfies the following condition (1).
- MAX The maximum value in absolute value of the relative refractive index temperature coefficient in air of 0 to 20 ° C. with respect to light in the wavelength region of 580 to 640 nm, obtained for each lens element constituting the cemented lens element. is there.
- the condition (1) is a condition related to the relative refractive index temperature coefficient of the lens elements constituting the cemented lens element in the second group.
- condition (a) is satisfied because the cemented lens element of the second group satisfies the condition (1).
- a single focus lens system having a basic configuration like the single focus lens systems according to Embodiments 1 to 6 is beneficial to satisfy the following condition (2).
- the condition (2) is a condition related to the diagonal field angle of the single focus lens system.
- it is possible to reduce the focus shift in the optical axis direction caused by the change in the refractive index of the lens element when the temperature changes while satisfying the condition (2).
- the single focus lens system according to the present disclosure can achieve the above-described effect even if the following condition (2) ′ is satisfied. 2 ⁇ DIA ⁇ 160 (2) ′
- the single focus lens systems according to Numerical Examples 1 to 6 to be described later satisfy the condition (2), thereby realizing a further wide angle while maintaining high optical performance.
- the camera provided with the single focus lens system in the present disclosure when installed at the rear side position of an automobile and is applied as a rear-view vehicle-mounted camera, not only the diagonal angle of view is large, but also a horizontal image. It is beneficial that the corners also have a certain size.
- the range including 7 points A to G is 3.04 m ⁇ 6.10 m. That is, the installation of an in-vehicle camera capable of providing an image (video) that allows a driver to visually recognize an object, a person, or the like in a range of about 3 m ⁇ 6 m behind the vehicle is about to be obliged in the United States.
- an image for example, an object having a height of about 80 cm (generally the height of an infant's height), a person, etc. can be visually recognized
- the single focus lens system provided in the in-vehicle camera satisfies the following condition (b). 2 ⁇ HOR ⁇ 176 (b) here, 2 ⁇ HOR : Horizontal angle of view (°) It is.
- a single focus lens system having a basic configuration like the single focus lens systems according to Embodiments 1 to 6 is beneficial to satisfy the following condition (3).
- the condition (3) is a condition relating to the ratio between the focal length of the cemented lens element in the second group and the focal length of the entire single-focus lens system.
- the power of the cemented lens element in the single focus lens system can be adjusted to an appropriate value, so that it is possible to realize a small single focus lens system having good aberration performance. .
- the upper limit of the condition (3) is exceeded, the power of the cemented lens element becomes too small, the overall length of the lens becomes long, and as a result, it is difficult to reduce the size of the single focus lens system.
- the lower limit of the condition (3) is not reached, the power of the cemented lens element becomes too large, the generated aberration becomes large, and appropriate aberration correction becomes difficult.
- the single focus lens systems according to Numerical Examples 1 to 6 described later satisfy both the condition (3) and achieve both further miniaturization and good aberration performance maintenance.
- the first group includes a lens element made of glass on the most object side.
- the lens element made of glass on the most object side of the entire system, it is possible to improve the environmental resistance of the single focus lens system.
- the first lens unit has a negative meniscus lens element having a convex surface facing the object side in order from the object side to the image side.
- a single-focus lens system including a lens element having negative power (hereinafter also referred to as a negative lens element for short) and a lens element having positive power (hereinafter also referred to as a positive lens element for short) It is beneficial to satisfy the condition (4).
- MAX In the absolute value of the relative refractive index temperature coefficient in the air of 0 to 20 ° C. with respect to light in the wavelength region of 580 to 640 nm, obtained for the negative lens element and the positive lens element constituting the first group. The maximum value.
- the condition (4) is a condition related to the relative refractive index temperature coefficient of the negative lens element and the positive lens element constituting the first group.
- a single focus lens system having a basic configuration and having a cemented lens element composed of a negative lens element and a positive lens element has the following condition (5): It is beneficial to satisfy Nd MIN > 1.50 (5) here, Nd MIN : the refractive index at the d-line of the positive lens element constituting the cemented lens element
- the condition (5) is a condition relating to the refractive index of the positive lens element constituting the cemented lens element.
- Embodiment 7 camera and automobile
- the camera provided with the single focus lens system according to Embodiment 1 will be described using an in-vehicle camera as an example.
- any one of the single focus lens systems according to the second to sixth embodiments may be applied instead of the single focus lens system according to the first embodiment.
- FIG. 13A is a schematic diagram of an in-vehicle camera provided with the single focus lens system according to the first embodiment.
- the in-vehicle camera 100 is condensed by the single focus lens system 201 and the single focus lens system 201.
- the in-vehicle camera 100 is set in a vehicle and used as a sensing camera or a view camera.
- the image captured by the sensing camera is used to check the inter-vehicle distance from other vehicles.
- An image captured by the view camera is displayed on a monitor inside the vehicle, and is used by the driver to confirm the front and rear of the vehicle.
- the single-focus lens system according to the present disclosure is a lens system in which a diagonal angle of view is 150 ° or more in consideration of temperature characteristics and is extremely widened. Since the occurrence of image aberration can be suppressed as much as possible, it is effective as a lens system for a view camera.
- FIG. 13 (b) is a schematic diagram of an automobile equipped with a camera at the rear position of the vehicle.
- the automobile includes a vehicle-mounted camera 100 at a rear position of the vehicle, a processing unit that detects an external environment based on a captured image obtained by the imaging element 202 provided in the vehicle-mounted camera 100 and controls each unit ( CPU) 300.
- the image sensor 202 receives an optical image formed by the single focus lens system 201 and converts it into an electrical image signal.
- the CPU 300 acquires an image signal, checks the presence of pedestrians and obstacles, and notifies the driver of the presence of pedestrians and obstacles according to the check result.
- the single focus lens system according to the present disclosure is effective as a lens system of a view camera, but can also be used as a lens system of a sensing camera.
- the in-vehicle camera when applied as a rear view camera (a rear-view in-vehicle camera) among the view cameras, not only the diagonal angle of view is large but also the horizontal angle of view has a certain size. It is beneficial.
- the single focus lens system provided in the in-vehicle camera satisfies the condition (b), that is, the horizontal angle of view is 176 ° or more. It is beneficial.
- the single-focus lens systems according to the present disclosure have a large horizontal angle of view of about 190 °, and thus can be viewed in a wider range behind the vehicle. It is very effective as a lens system for such a rear view camera.
- the seventh embodiment has been described as an example of the technique disclosed in the present application.
- the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed.
- Embodiment 7 An example in which the single focus lens system according to Embodiments 1 to 6 in the present disclosure is applied to an in-vehicle camera that is a sensing camera or a view camera is shown as Embodiment 7, but the single focus lens system in the present disclosure is described.
- a surveillance camera a web camera, etc. in a surveillance system.
- the surface marked with * is an aspherical surface, and 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
- a n is an n-order aspheric coefficient.
- 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 vertical axis represents the image height
- w represents the diagonal half field angle.
- the solid line is the characteristic of the sagittal plane (indicated by s in the figure), and the broken line is the characteristic of the meridional plane (indicated by m in the figure).
- the vertical axis represents the image height
- w represents the diagonal half field angle.
- Table 19 shows the corresponding values for each condition in the single focus lens system of each numerical example.
- This disclosure can be applied to in-vehicle cameras, surveillance cameras, web cameras, and the like.
- the present disclosure is useful for cameras that require a wide-angle lens system such as an in-vehicle camera and a surveillance camera.
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Abstract
Description
物体側から像側へと順に、第1群と、開口絞りと、第2群とからなり、
前記第2群は、正のパワーを有する接合レンズ素子を含み、該接合レンズ素子の接合面は、非球面であり、
前記接合レンズ素子は、以下の条件(1):
|dn/dt1|MAX≦2.67×10-5 ・・・(1)
(ここで、
|dn/dt1|MAX:接合レンズ素子を構成する各レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である)
を満足する
ことを特徴とする。
単焦点レンズ系と、
前記単焦点レンズ系で集光された光を撮像する撮像素子と
を備え、
前記単焦点レンズ系は、
物体側から像側へと順に、第1群と、開口絞りと、第2群とからなり、
前記第2群は、正のパワーを有する接合レンズ素子を含み、該接合レンズ素子の接合面は、非球面であり、
前記接合レンズ素子は、以下の条件(1):
|dn/dt1|MAX≦2.67×10-5 ・・・(1)
(ここで、
|dn/dt1|MAX:接合レンズ素子を構成する各レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である)
を満足する単焦点レンズ系である
ことを特徴とする。
カメラと、
前記カメラに備えられた撮像素子により得られた撮像画像に基づいて外部環境を検知し、各部を制御する処理部と
を備え、
前記カメラは、
物体側から像側へと順に、第1群と、開口絞りと、第2群とからなり、
前記第2群は、正のパワーを有する接合レンズ素子を含み、該接合レンズ素子の接合面は、非球面であり、
前記接合レンズ素子は、以下の条件(1):
|dn/dt1|MAX≦2.67×10-5 ・・・(1)
(ここで、
|dn/dt1|MAX:接合レンズ素子を構成する各レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である)
を満足する単焦点レンズ系と、
前記単焦点レンズ系で集光された光を撮像する撮像素子と
を備えるカメラである
ことを特徴とする。
図1、3、5、7、9及び11は、各々実施の形態1~6に係る単焦点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単焦点レンズ系を表している。各図において、特定の面に付されたアスタリスク*は、該面が非球面であることを示している。各図において、最も右側に記載された直線は、像面Sの位置を表しており、像面Sの物体側には、平行平板CGが設けられている。
実施の形態1に係る単焦点レンズ系は、図1に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
実施の形態2に係る単焦点レンズ系は、図3に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
実施の形態3に係る単焦点レンズ系は、図5に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
実施の形態4に係る単焦点レンズ系は、図7に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
実施の形態5に係る単焦点レンズ系は、図9に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
実施の形態6に係る単焦点レンズ系は、図11に示すように、物体側から像側へと順に、第1レンズ素子L1と、第2レンズ素子L2と、第3レンズ素子L3と、開口絞りAと、第4レンズ素子L4及び第5レンズ素子L5からなる接合レンズ素子とからなる。第1レンズ素子L1、第2レンズ素子L2及び第3レンズ素子L3が第1群を構成しており、接合レンズ素子が第2群を構成している。
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1~6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、適宜、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可能である。
ア.HOYA(株)製
硝種名:M-FDS2、M-FDS1、M-FDS910、
M-FD80、M-NBFD10、M-TAFD307
イ.(株)住田光学ガラス製
硝種名:K-PSFn203、K-PSFn2、K-PSFn5、
K-PSFn1、K-PSFn4、K-PSFn3、
K-VC91、K-VC90、K-ZnSF8、K-PG395、
K-CD45、K-CD120
ウ.(株)オハラ製
硝種名:L-BBH1、L-BBH2、L-NBH54、L-TIH53、
L-LAH86、L-TIM28
エ.HOYA(株)製
硝種名:M-FCD500、M-BACD5N、M-PCD51、
M-BACD12、M-PCD4、M-BACD12、
M-BACD15、M-LAC14、M-LAC130、
M-LAC8、M-TAC80、M-TAC60
オ.(株)住田光学ガラス製
硝種名:K-GFK70、K-GFK68、K-PSK300、
K-LaFK60、K-PSK11、K-CSK120、
K-PSK100、K-VC79、K-PSK200、
K-VC78、K-LaFK55、K-VC80、
K-LaFK50
カ.(株)オハラ製
硝種名:L-LAL13、L-LAL12、L-BAL43、
L-BAL42、L-BAL35、S-FPM2、
L-PHL2
|dn/dt1|MAX≦2.67×10-5 ・・・(1)
ここで、
|dn/dt1|MAX:接合レンズ素子を構成する各レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である。
|dn/dt1|MAX≦7.50×10-6 ・・・(1)’
|dBF/f|≦3.50×10-4 ・・・(a)
ここで、
dBF:温度変化1℃あたりの各レンズ素子の屈折率の変化によって生じる光軸方向でのピントずれ、
f:全系のd線における焦点距離
である。
2ωDIA≧150 ・・・(2)
ここで、
2ωDIA:対角画角(°)
である。
2ωDIA≧160 ・・・(2)’
2ωHOR≧176 ・・・(b)
ここで、
2ωHOR:水平画角(°)
である。
2.0<fCEM/f<4.0 ・・・(3)
ここで、
fCEM:接合レンズ素子のd線における焦点距離、
f:全系のd線における焦点距離
である。
2.4<fCEM/f ・・・(3)’
fCEM/f<3.5 ・・・(3)’’
|dn/dt2|MAX≧9.00×10-5 ・・・(4)
ここで、
|dn/dt2|MAX:第1群を構成する負レンズ素子及び正レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である。
|dn/dt2|MAX≧1.00×10-4 ・・・(4)’
NdMIN>1.50 ・・・(5)
ここで、
NdMIN:接合レンズ素子を構成する正レンズ素子の、d線における屈折率
である。
NdMIN>1.55 ・・・(5)’
実施の形態1に係る単焦点レンズ系を備えたカメラについて、車載カメラを例に挙げて説明する。なお、該車載カメラにおいて、実施の形態1に係る単焦点レンズ系の替わりに、実施の形態2~6に係る単焦点レンズ系のいずれか1つを適用してもよい。
以下、実施の形態1~6に係る単焦点レンズ系を具体的に実施した数値実施例を説明する。なお、各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。なお、表中「画角」とあるのは、対角半画角のことである。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、dn/dtは波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数である。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の単焦点レンズ系は、図1に示した実施の形態1に対応する。数値実施例1の単焦点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 dn/dt
物面 ∞
1 11.35070 0.60000 1.83481 42.7 4.70E-06
2 3.70350 2.32000
3* -33.90210 0.60000 1.53460 56.3 -9.20E-05
4* 1.40460 1.33000
5* 18.02970 1.50000 1.63450 23.9 -1.10E-04
6* -3.47580 0.96500
7(絞り) ∞ 0.60000
8* 2.41960 0.60000 1.83271 24.1 -1.10E-06
9* 1.06890 1.71000 1.61881 63.9 -2.90E-06
10* -2.28030 1.67420
11 ∞ 0.70000 1.51680 64.1 2.20E-06
12 ∞ 0.10000
13 ∞ (BF)
像面 ∞
第3面
K=-3.17199E+02, A4= 1.09422E-03, A6=-1.21083E-04, A8=-1.61127E-05
A10= 1.45427E-06, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第4面
K=-5.80806E-01, A4= 1.41103E-02, A6=-1.86620E-03, A8= 7.07398E-03
A10=-1.71716E-03, A12=-4.33448E-04, A14= 5.02234E-04, A16=-1.00984E-04
第5面
K= 8.20985E+01, A4= 4.08397E-03, A6= 3.87174E-03, A8=-4.22244E-04
A10= 0.00000E+00, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第6面
K=-2.13843E+00, A4= 6.46864E-03, A6=-2.56893E-03, A8=-2.17942E-04
A10= 0.00000E+00, A12= 0.00000E+00, A14= 0.00000E+00, A16= 0.00000E+00
第8面
K= 3.98312E-01, A4=-8.81298E-03, A6= 7.79660E-04, A8=-2.62717E-03
A10= 2.00824E-03, A12=-8.08704E-04, A14=-2.00864E-06, A16=-1.32875E-06
第9面
K=-6.78769E-01, A4= 6.81879E-02, A6=-8.10911E-02, A8= 2.89796E-02
A10= 3.42269E-03, A12=-2.31368E-03, A14=-2.71488E-03, A16= 5.80436E-04
第10面
K=-1.11291E+00, A4= 8.63634E-03, A6=-4.63511E-03, A8= 2.27847E-02
A10=-1.51526E-02, A12=-9.53189E-04, A14= 5.62029E-03, A16=-1.57910E-03
焦点距離 0.9801
Fナンバー 2.07010
画角 108.0000
像高 1.9000
レンズ全長 12.6841
BF -0.01512
入射瞳位置 3.0287
射出瞳位置 -6.3628
前側主点位置 3.8574
後側主点位置 11.7040
単レンズデータ
レンズ 始面 焦点距離
1 1 -6.8286
2 3 -2.5080
3 5 4.7204
4 8 -2.8809
5 9 1.4613
接合レンズデータ
始面 終面 焦点距離
8 10 2.7807
数値実施例2の単焦点レンズ系は、図3に示した実施の形態2に対応する。数値実施例2の単焦点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 dn/dt
物面 ∞
1 8.69940 0.60000 1.83481 42.7 4.70E-06
2 3.05460 2.45290
3 -22.67870 0.72110 1.77250 49.6 4.80E-06
4 1.89430 0.77250
5 188.81560 2.81450 1.90366 31.3 3.40E-06
6 -4.15070 0.19470
7(絞り) ∞ 0.75700
8* 2.77870 3.06110 1.72903 54.0 4.10E-06
9* -1.22220 0.50000 2.00178 19.3 6.30E-06
10* -3.14200 1.37180
11 ∞ 0.70000 1.51680 64.1 2.20E-06
12 ∞ 0.10000
13 ∞ (BF)
像面 ∞
第8面
K= 3.70812E-02, A4= 3.34078E-03, A6= 2.96074E-03, A8=-8.63765E-04
第9面
K=-8.91526E-01, A4=-3.30865E-02, A6= 8.86206E-03, A8= 5.10167E-03
第10面
K=-1.35766E+01, A4=-2.49491E-02, A6= 1.95944E-02, A8=-3.20199E-04
焦点距離 1.0458
Fナンバー 2.05929
画角 107.0000
像高 1.9418
レンズ全長 14.0738
BF 0.02818
入射瞳位置 2.8513
射出瞳位置 -7.0220
前側主点位置 3.7419
後側主点位置 13.0280
単レンズデータ
レンズ 始面 焦点距離
1 1 -5.9256
2 3 -2.2346
3 5 4.5258
4 8 1.7188
5 9 -2.2960
接合レンズデータ
始面 終面 焦点距離
8 10 3.3089
数値実施例3の単焦点レンズ系は、図5に示した実施の形態3に対応する。数値実施例3の単焦点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 dn/dt
物面 ∞
1 7.87980 0.60000 1.83481 42.7 4.70E-06
2 3.17420 1.69190
3 22.03630 0.60000 1.77250 49.6 4.80E-06
4 1.60000 1.71810
5 71.26080 2.07950 1.90366 31.3 3.40E-06
6 -3.44130 0.16080
7(絞り) ∞ 0.92020
8* 2.89540 0.94730 1.82115 24.1 -2.00E-07
9* 0.85900 2.10720 1.61881 63.9 -2.90E-06
10* -2.10700 1.32820
11 ∞ 0.70000 1.51680 64.1 2.20E-06
12 ∞ 0.10000
13 ∞ (BF)
像面 ∞
第8面
K=-8.88056E-01, A4=-8.21796E-03, A6=-4.02136E-03, A8= 2.92067E-03
A10=-6.35903E-04, A12= 0.00000E+00
第9面
K=-1.07923E+00, A4= 5.38597E-02, A6=-5.47753E-02, A8= 1.84038E-02
A10=-1.16473E-03, A12=-8.46024E-04
第10面
K=-7.62804E-01, A4= 2.28416E-03, A6= 1.26424E-02, A8=-7.95749E-03
A10= 2.46051E-03, A12= 0.00000E+00
焦点距離 0.9964
Fナンバー 2.07826
画角 109.0000
像高 1.9559
レンズ全長 12.9880
BF 0.03478
入射瞳位置 2.7122
射出瞳位置 -12.0223
前側主点位置 3.6263
後側主点位置 11.9916
単レンズデータ
レンズ 始面 焦点距離
1 1 -6.7593
2 3 -2.2623
3 5 3.6814
4 8 -1.8821
5 9 1.3538
接合レンズデータ
始面 終面 焦点距離
8 10 3.3167
数値実施例4の単焦点レンズ系は、図7に示した実施の形態4に対応する。数値実施例4の単焦点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 dn/dt
物面 ∞
1 37.92220 0.60000 1.72916 54.7 2.60E-06
2 6.70500 2.70000
3* -835.48100 0.84000 1.53460 56.3 -9.20E-05
4* 2.66920 2.81000
5* 11.09970 3.09000 1.63450 23.9 -1.10E-04
6* -8.83650 0.45000
7(絞り) ∞ 0.06000
8* 4.68880 2.15550 1.68893 31.2 -2.90E-06
9* 1.16450 2.90750 1.55332 71.7 -5.70E-06
10* -3.95110 4.21560
11 ∞ 0.90000 1.51680 64.2 2.60E-06
12 ∞ 0.30000
13 ∞ (BF)
像面 ∞
第3面
K= 1.00000E+03, A4= 4.07645E-04, A6=-3.78260E-07, A8=-9.85094E-08
A10=-1.33542E-08, A12=-8.45609E-10, A14=-7.49711E-12, A16=-6.25430E-13
第4面
K=-8.25858E-01, A4= 2.57983E-05, A6= 2.23395E-04, A8= 5.79271E-06
A10= 3.72598E-06, A12= 7.21702E-09, A14= 0.00000E+00, A16= 0.00000E+00
第5面
K=-3.39245E+01, A4= 1.38898E-03, A6= 1.24680E-04, A8=-1.56215E-06
A10= 4.29395E-06, A12= 2.45888E-07, A14= 0.00000E+00, A16= 0.00000E+00
第6面
K= 1.10394E+00, A4=-8.14425E-04, A6= 9.44115E-04, A8=-3.93687E-05
A10= 2.93378E-06, A12= 5.03951E-08, A14=-3.34428E-07, A16= 5.75048E-07
第8面
K=-2.57270E+00, A4=-9.82327E-04, A6= 7.72242E-04, A8= 1.89571E-04
A10=-2.55084E-04, A12= 1.39069E-04, A14= 6.11709E-05, A16=-4.97849E-05
第9面
K=-9.39432E-01, A4=-7.58456E-03, A6= 2.94691E-04, A8= 9.79729E-04
A10=-8.26440E-06, A12=-3.64238E-05, A14= 2.64487E-05, A16=-8.11723E-06
第10面
K=-1.90909E+00, A4=-1.11112E-03, A6= 5.28479E-04, A8=-1.26240E-04
A10=-9.92121E-06, A12= 2.82318E-06, A14= 8.43271E-07, A16=-3.14709E-07
焦点距離 2.5577
Fナンバー 2.90243
画角 80.0000
像高 3.5931
レンズ全長 21.0449
BF 0.01630
入射瞳位置 4.2490
射出瞳位置 -10.3679
前側主点位置 6.1767
後側主点位置 18.4872
単レンズデータ
レンズ 始面 焦点距離
1 1 -11.2618
2 3 -4.9753
3 5 8.2502
4 8 -2.9963
5 9 2.0381
接合レンズデータ
始面 終面 焦点距離
8 10 6.5624
数値実施例5の単焦点レンズ系は、図9に示した実施の形態5に対応する。数値実施例5の単焦点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 dn/dt
物面 ∞
1 38.72870 0.60000 1.72916 54.7 2.60E-06
2 6.63090 2.30000
3* -229.63260 0.84000 1.53460 56.3 -9.20E-05
4* 2.68390 2.85000
5* 10.93090 3.09000 1.63450 23.9 -1.10E-04
6* -8.71100 0.47000
7(絞り) ∞ 0.00000
8* 5.81610 2.40000 1.82115 24.1 -2.00E-07
9* 1.64400 2.95000 1.61881 63.9 -2.90E-06
10* -4.15220 4.35500
11 ∞ 0.90000 1.51680 64.2 2.60E-06
12 ∞ 0.30000
13 ∞ (BF)
像面 ∞
第3面
K= 1.00000E+03, A4= 4.07630E-04, A6=-4.09635E-07, A8=-1.02624E-07
A10=-1.36542E-08, A12=-8.51123E-10, A14=-6.47434E-12, A16=-4.26061E-13
第4面
K=-8.26237E-01, A4= 2.25543E-05, A6= 2.23243E-04, A8= 5.83952E-06
A10= 3.73936E-06, A12= 9.83906E-09, A14= 0.00000E+00, A16= 0.00000E+00
第5面
K=-3.38965E+01, A4= 1.39142E-03, A6= 1.25248E-04, A8=-1.38836E-06
A10= 4.35285E-06, A12= 2.65445E-07, A14= 0.00000E+00, A16= 0.00000E+00
第6面
K= 1.07958E+00, A4=-8.10132E-04, A6= 9.49817E-04, A8=-3.72019E-05
A10= 3.00728E-06, A12=-5.99960E-07, A14=-7.14312E-07, A16= 3.29022E-07
第8面
K=-6.22451E-01, A4=-2.20975E-03, A6=-1.71634E-05, A8= 8.30452E-04
A10=-2.37223E-04, A12=-8.76248E-05, A14= 1.00417E-05, A16= 1.81446E-05
第9面
K=-8.91638E-01, A4=-8.12343E-03, A6=-5.92764E-04, A8= 8.23238E-04
A10=-1.63472E-04, A12= 9.70445E-06, A14= 6.34900E-06, A16=-1.16995E-06
第10面
K=-2.11980E+00, A4=-6.16754E-04, A6= 4.65339E-04, A8=-5.80184E-05
A10= 3.77877E-06, A12=-2.44485E-07, A14= 5.38180E-07, A16=-9.44250E-08
焦点距離 2.5944
Fナンバー 2.89890
画角 80.0000
像高 3.5924
レンズ全長 21.0665
BF 0.01154
入射瞳位置 4.0506
射出瞳位置 -10.5328
前側主点位置 6.0066
後側主点位置 18.4722
単レンズデータ
レンズ 始面 焦点距離
1 1 -11.0597
2 3 -4.9561
3 5 8.1372
4 8 -3.7684
5 9 2.3629
接合レンズデータ
始面 終面 焦点距離
8 10 6.6150
数値実施例6の単焦点レンズ系は、図11に示した実施の形態6に対応する。数値実施例6の単焦点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 dn/dt
物面 ∞
1 9.00620 0.60000 1.83481 42.7 4.70E-06
2 3.00700 2.40280
3 -27.06920 0.73760 1.77250 49.6 4.80E-06
4 1.89060 0.77430
5 141.82810 2.82050 1.90366 31.3 3.40E-06
6 -4.16160 0.20770
7(絞り) ∞ 0.78630
8* 2.70060 3.05190 1.72903 54.0 4.10E-06
9* -1.36960 0.50000 2.14780 17.3 2.67E-05
10* -2.99990 1.36780
11 ∞ 0.70000 1.51680 64.1 2.20E-06
12 ∞ 0.10000
13 ∞ (BF)
像面 ∞
第8面
K=-9.59574E-02, A4= 3.40436E-03, A6= 2.98797E-03, A8=-6.90765E-04
第9面
K=-1.00383E+00, A4=-2.77855E-02, A6= 4.22185E-04, A8= 6.41574E-03
第10面
K=-1.14849E+01, A4=-2.72463E-02, A6= 1.80108E-02, A8= 1.82867E-04
焦点距離 1.0424
Fナンバー 2.07151
画角 107.0000
像高 1.9453
レンズ全長 14.0835
BF 0.03458
入射瞳位置 2.7915
射出瞳位置 -7.0516
前側主点位置 3.6806
後側主点位置 13.0411
単レンズデータ
レンズ 始面 焦点距離
1 1 -5.6653
2 3 -2.2625
3 5 4.5154
4 8 1.8228
5 9 -2.6261
接合レンズデータ
始面 終面 焦点距離
8 10 3.3289
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
CG 平行平板
A 開口絞り
S 像面
201 単焦点レンズ系
Claims (8)
- 物体側から像側へと順に、第1群と、開口絞りと、第2群とからなり、
前記第2群は、正のパワーを有する接合レンズ素子を含み、該接合レンズ素子の接合面は、非球面であり、
前記接合レンズ素子は、以下の条件(1)を満足する、単焦点レンズ系:
|dn/dt1|MAX≦2.67×10-5 ・・・(1)
ここで、
|dn/dt1|MAX:接合レンズ素子を構成する各レンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である。 - 以下の条件(2)を満足する、請求項1に記載の単焦点レンズ系:
2ωDIA≧150 ・・・(2)
ここで、
2ωDIA:対角画角(°)
である。 - 以下の条件(3)を満足する、請求項1に記載の単焦点レンズ系:
2.0<fCEM/f<4.0 ・・・(3)
ここで、
fCEM:接合レンズ素子のd線における焦点距離、
f:全系のd線における焦点距離
である。 - 第1群は、最物体側にガラスからなるレンズ素子を備える、請求項1に記載の単焦点レンズ系。
- 第1群は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状のレンズ素子と、負のパワーを有するレンズ素子と、正のパワーを有するレンズ素子とを備え、
以下の条件(4)を満足する、請求項1に記載の単焦点レンズ系:
|dn/dt2|MAX≧9.00×10-5 ・・・(4)
ここで、
|dn/dt2|MAX:第1群を構成する負のパワーを有するレンズ素子及び正のパワーを有するレンズ素子について求めた、波長領域580~640nmの光に対する0~20℃の空気中での相対屈折率温度係数の絶対値における、最大値
である。 - 接合レンズ素子は、負のパワーを有するレンズ素子と正のパワーを有するレンズ素子とからなり、
以下の条件(5)を満足する、請求項1に記載の単焦点レンズ系:
NdMIN>1.50 ・・・(5)
ここで、
NdMIN:接合レンズ素子を構成する正のパワーを有するレンズ素子の、d線における屈折率
である。 - 請求項1に記載の単焦点レンズ系と、
前記単焦点レンズ系で集光された光を撮像する撮像素子と
を備える、カメラ。 - 請求項7に記載のカメラと、
前記カメラに備えられた撮像素子により得られた撮像画像に基づいて外部環境を検知し、各部を制御する処理部と
を備える、自動車。
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WO2018198943A1 (ja) * | 2017-04-26 | 2018-11-01 | 京セラオプテック株式会社 | 撮像レンズ |
JP7075441B2 (ja) | 2017-04-26 | 2022-05-25 | 京セラ株式会社 | 撮像レンズ |
WO2020162094A1 (ja) * | 2019-02-06 | 2020-08-13 | 日本電産サンキョー株式会社 | 広角レンズ |
JP2020126198A (ja) * | 2019-02-06 | 2020-08-20 | 日本電産サンキョー株式会社 | 広角レンズ |
CN113366361A (zh) * | 2019-02-06 | 2021-09-07 | 日本电产三协株式会社 | 广角镜头 |
JP7219105B2 (ja) | 2019-02-06 | 2023-02-07 | 日本電産サンキョー株式会社 | 広角レンズ |
CN113366361B (zh) * | 2019-02-06 | 2023-03-07 | 日本电产三协株式会社 | 广角镜头 |
US12072552B2 (en) | 2019-02-06 | 2024-08-27 | Nidec Sankyo Corporation | Wide-angle lens |
JP7152624B1 (ja) | 2022-03-29 | 2022-10-12 | エーエーシー オプティックス (ソシュウ) カンパニーリミテッド | 撮像光学レンズ |
JP2023147144A (ja) * | 2022-03-29 | 2023-10-12 | エーエーシー オプティックス (ソシュウ) カンパニーリミテッド | 撮像光学レンズ |
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US9939613B2 (en) | 2018-04-10 |
CN105705980A (zh) | 2016-06-22 |
US20160252707A1 (en) | 2016-09-01 |
US20180196232A1 (en) | 2018-07-12 |
JP2017107249A (ja) | 2017-06-15 |
JP6519758B2 (ja) | 2019-05-29 |
EP3070506A1 (en) | 2016-09-21 |
EP3070506A4 (en) | 2016-11-16 |
JPWO2015072094A1 (ja) | 2017-03-16 |
CN105705980B (zh) | 2019-12-27 |
EP3070506B1 (en) | 2020-04-08 |
JP6172613B2 (ja) | 2017-08-02 |
US10203480B2 (en) | 2019-02-12 |
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