Vehicle vision system with asymmetric anamorphic lens

摘要

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.

主权项

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.