Patent ID: 11880036
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 8:
9. A method, comprising:
determining a desired location of an eyebox for at least one image projected from a waveguide head-up display (HUD), wherein the waveguide HUD includes a waveguide and a prism, and wherein the at least one image is projected from the waveguide and through the prism;
determining a location of the waveguide HUD based on the desired location of the eyebox;
determining an index of refraction of the prism based on the desired location of the eyebox and the determined location of the waveguide, wherein the index of refraction is selected such that the at least one image as projected from the prism is offset in a lateral direction from the at least one image as projected from the waveguide; and
installing the waveguide HUD in the determined location,
wherein an upper surface of the prism is configured to deflect ambient light directed at the waveguide away from the eyebox,
wherein a normal of the upper surface of the prism is selected such that ambient light having an incident angle within a predetermined range of the normal is directed away from the eyebox,
an anti-reflective (AR) coating is disposed on a lower surface of the prism; and
a filter coating is disposed on the upper surface of the prism.