Camera arrangement for a motor vehicle

摘要

A camera arrangement includes a camera and a prism. The camera includes a camera sensor having an array of pixels. The prism is arranged between a window pane such as a vehicle windshield and the camera sensor. Optical properties of the camera sensor and the prism are matched to one another such that a maximum broadening of a light beam due to dispersion of the prism lies within one pixel of the camera sensor.

主权项

1. A camera arrangement comprising:
a camera including a camera sensor having an array of pixels, wherein each pixel of the camera sensor has the same pixel size p; a single prism of a homogeneous material, the prism having a right-angled trapezoid form including an integral combination of (i) a plane parallel plate having parallel first and second main surfaces and (ii) an angled prism taper adjacent the second main surface of the plane parallel plate, the angled prism taper having a prism angle (β) relative to the second main surface of the plane parallel plate, the first main surface of the plane parallel plate and the angled prism taper each constituting a respective portion of a perimeter of the right-angled trapezoid form, the prism being arranged between a window pane and the camera with the plane parallel plate being between the window pane and the angled prism taper, the first main surface of the plane parallel plate facing towards the window pane, the angled prism taper facing towards the camera, and the first main surface of the plane parallel plate and the angled prism taper both being oblique to an optical axis of the camera; wherein the camera further includes a camera objective, the camera objective being arranged between the prism and the camera sensor, the camera objective being at a focal length f apart from the camera sensor; wherein optical properties of the camera sensor and the prism including the prism angle (β) are matched to one another such that a maximum broadening of a light beam due to dispersion of the prism lies within one pixel of the camera sensor; and wherein the prism angle (β), the focal length f, and the pixel size p are matched to one another such that ((tan αblue−tan αred)*f)