Snap Inc. (20250076660). OPTICAL STRUCTURE FOR AUGMENTED REALITY DISPLAY

OPTICAL STRUCTURE FOR AUGMENTED REALITY DISPLAY

Organization Name

Snap Inc.

Inventor(s)

Mohmed Salim Valera of Sutton Coldfield (GB)

OPTICAL STRUCTURE FOR AUGMENTED REALITY DISPLAY

This abstract first appeared for US patent application 20250076660 titled 'OPTICAL STRUCTURE FOR AUGMENTED REALITY DISPLAY

Original Abstract Submitted

an augmented reality display is disclosed. a colour projector emits an image in a narrow beam comprising three primary colours: red, green and blue. a pair of waveguides is provided in the path of the projected beam. a first input grating receives light from the projector and diffracts the received light so that diffracted wavelengths of the light in first and second primary colours are coupled into the first waveguide , and so that diffracted wavelengths of the light in second and third primary colours are coupled out of the first waveguide in a direction towards the second waveguide . a second input diffraction grating receives light coupled out of the first waveguide and diffracts the second and third primary colours so that they are coupled into the second waveguide