Patent ID: 11914120
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Optics (Instruments)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A windshield corrective optical system, comprising:
an automobile vehicle having a windshield, the windshield being oriented at a rake angle;
a camera positioned within a passenger compartment of the automobile vehicle directed toward the windshield and receiving light rays passing through the windshield;
a sensor receiving the light rays; and
a corrective element passing the light rays through the corrective element to the sensor, the corrective element correcting aberrations of the light rays induced by the rake angle of the windshield as the light rays pass through the corrective element prior to the light rays reaching the sensor, the corrective element being positioned within the camera, and the camera being positioned in a line of sight of the windshield such that the light rays travel from the windshield directly to the camera; and
wherein the corrective element is oriented at a corrective angle oriented opposite to the rake angle, an absolute value of the rake angle is equal to an absolute value of the corrective angle, the rake angle has a positive value, the corrective angle has a negative value, the camera is elongated along a camera axis, the windshield is elongated along a windshield axis, the rake angle is defined from the camera axis to the windshield axis, the corrective element is elongated along an element axis, the corrective angle is defined from the camera axis to the element axis, the corrective element has a first index of refraction, the windshield has a second index of refraction, the first index of refraction is equal to the second index of refraction, the corrective element has a first surface and a second surface opposite the first surface, the first surface is flat, the second surface is flat, the first surface is parallel to the second surface, the windshield corrective optical system further includes a first anti-reflective coating applied to the first surface of the corrective element, the windshield corrective optical system further includes a second anti-reflective coating applied to the second surface of the corrective element, the first index of refraction is 1.5038, the corrective element has an Abbie number, the Abbie number is 66.922, the rake angle is 60 degrees, and the corrective angle is −60 degrees.