Patent ID: 11960087
Assignee: SHENZHEN OPTIARK SEMICONDUCTOR TECHNOLOGIES LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 8:
9. The optical device of claim 1, wherein taking a direction from left to right as a reference, a direction of a grating vector of the entrance pupil grating unit is −1 to 1 degree, a direction of a grating vector of the left pupil-expanding grating unit is 30 to 60 degrees, a direction of a grating vector of the right pupil-expanding grating unit is 120 to 150 degrees, a direction of a grating vector of the left exit pupil grating unit is 88 to 92 degrees, and a direction of a grating vector of the right exit pupil grating unit is 88 to 92 degrees.