Vehicle vision system with asymmetric anamorphic lens
First Claim
1. A vision system for a vehicle, said vision system comprising:
- a rear camera disposed at a rear portion of a vehicle and having an exterior field of view rearward of the vehicle, wherein said rear camera is operable to capture image data;
wherein said rear camera comprises a two dimensional imaging array of photosensing pixels;
wherein said rear camera comprises a lens system for imaging external sources of light at said imaging array;
wherein said lens system comprises at least one asymmetric anamorphic lens optic;
wherein said at least one asymmetric anamorphic lens optic comprises at least one truncated frustoconical lens optic;
wherein said truncated frustoconical lens optic comprises an upper region and a lower region, the upper region having a smaller cross dimension than the lower region, and a longitudinal axis spanning the upper region and the lower region;
wherein said truncated frustoconical lens optic is truncated about the longitudinal axis creating a single flat facet spanning the upper and lower regions of the truncated frustoconical lens optic;
wherein said longitudinal axis is vertically oriented with respect to a horizontal surface on which the vehicle is disposed; and
an image processor operable to process image data captured by said rear camera, wherein said image processor is operable to detect objects rearward of the vehicle during a reversing maneuver of the vehicle.
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Abstract
A vision system for a vehicle includes a rear camera disposed at a rear portion of the vehicle and having an exterior field of view rearward of the vehicle. The rear camera includes an imaging array and a lens system for imaging external sources of light at the imaging array. The lens system includes at least one asymmetric anamorphic lens optic. The asymmetric anamorphic lens optic may include a longitudinally truncated conical-shaped lens optic. The longitudinal axis of the longitudinally truncated conical-shaped lens optic may be generally vertical when the rear camera is disposed at the rear portion of the vehicle, with a smaller diameter portion at an upper region of the optic and a larger diameter portion at a lower region of the optic.
35 Citations
16 Claims
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1. A vision system for a vehicle, said vision system comprising:
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a rear camera disposed at a rear portion of a vehicle and having an exterior field of view rearward of the vehicle, wherein said rear camera is operable to capture image data; wherein said rear camera comprises a two dimensional imaging array of photosensing pixels; wherein said rear camera comprises a lens system for imaging external sources of light at said imaging array; wherein said lens system comprises at least one asymmetric anamorphic lens optic; wherein said at least one asymmetric anamorphic lens optic comprises at least one truncated frustoconical lens optic; wherein said truncated frustoconical lens optic comprises an upper region and a lower region, the upper region having a smaller cross dimension than the lower region, and a longitudinal axis spanning the upper region and the lower region; wherein said truncated frustoconical lens optic is truncated about the longitudinal axis creating a single flat facet spanning the upper and lower regions of the truncated frustoconical lens optic; wherein said longitudinal axis is vertically oriented with respect to a horizontal surface on which the vehicle is disposed; and an image processor operable to process image data captured by said rear camera, wherein said image processor is operable to detect objects rearward of the vehicle during a reversing maneuver of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A vision system for a vehicle, said vision system comprising:
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a rear camera disposed at a rear portion of a vehicle and having an exterior field of view rearward of the vehicle, wherein said rear camera is operable to capture image data; wherein said rear camera comprises a two dimensional imaging array of photosensing pixels; wherein said rear camera comprises a lens system for imaging external sources of light at said imaging array; wherein said lens system comprises at least one asymmetric anamorphic lens optic and wherein said at least one asymmetric anamorphic lens optic comprises at least one truncated frustoconical lens optic; wherein said truncated frustoconical lens optic comprises an upper region and a lower region, the upper region having a smaller cross dimension than the lower region, and a longitudinal axis spanning the upper region and the lower region; wherein said truncated frustoconical lens optic is truncated about the longitudinal axis creating a single flat facet spanning the upper and lower regions of the truncated frustoconical lens optic; wherein said longitudinal axis is vertically oriented with respect to a horizontal surface on which the vehicle is disposed; an image processor operable to process image data captured by said rear camera, wherein said image processor is operable to detect objects rearward of the vehicle during a reversing maneuver of the vehicle; and a display operable to display images representative of image data captured by said rear camera. - View Dependent Claims (15)
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16. A vision system for a vehicle, said vision system comprising:
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a front camera disposed at a forward portion of a vehicle and having an exterior field of view forward of the vehicle, wherein said front camera is operable to capture image data, and wherein said front camera comprises a two dimensional imaging array of photosensing pixels; a side camera disposed at each side of the vehicle and having a respective exterior field of view sideward of the vehicle, wherein each of said side cameras comprises an imaging array and a lens system comprising at least one asymmetric anamorphic lens optic, and wherein said image processor is operable to process image data captured by said side cameras; a rear camera disposed at a rear portion of a vehicle and having an exterior field of view rearward of the vehicle, wherein said rear camera is operable to capture image data, and wherein said rear camera comprises a two dimensional imaging array of photosensing pixels; wherein said rear camera comprises a lens system for imaging external sources of light at said imaging array; wherein said lens system comprises at least one asymmetric anamorphic lens optic and wherein said at least one asymmetric anamorphic lens optic comprises at least one truncated frustoconical lens optic; wherein said truncated frustoconical lens optic comprises an upper region and a lower region, the upper region having a smaller cross dimension than the lower region, and a longitudinal axis spanning the upper region and the lower region; wherein said truncated frustoconical lens optic is truncated about the longitudinal axis creating a single flat facet spanning the upper and lower regions of the truncated frustoconical lens optic; wherein said longitudinal axis is vertically oriented with respect to a horizontal surface on which the vehicle is disposed; an image processor operable to process image data captured by said rear camera, wherein said image processor is operable to detect objects rearward of the vehicle during a reversing maneuver of the vehicle; and a display operable to display images representative of image data captured by said rear camera.
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Specification