Patent ID: 11927765
Assignee: AKONIA HOLOGRAPHICS LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. An electronic device comprising:
a light source configured to emit non-visible light;
a waveguide having first and second substrates, the first substrate having opposing first and second lateral surfaces and the second substrate having opposing third and fourth lateral surfaces extending parallel to the first and second lateral surfaces; and
an optical coupler disposed in the waveguide, the optical coupler comprising:
a grating medium disposed between the first and second substrates, the grating medium being in contact with the second and third lateral surfaces, and
one or more volume holograms within the grating medium, the one or more volume holograms structure being configured to reflect the non-visible light about a reflective axis offset from a surface normal of the grating medium.