Patent ID: 11927755
Assignee: TECHNOLOGY INNOVATION MOMENTUM FUND (ISRAEL) LIMITED PARTNERSHIP
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  A | IPC F  G  H

Claim 24:
25. An optical system for a see-through display, the system comprising:
a stack of metasurface (MS) layers configured to receive light constituting an image; and
a waveguide (WG) coupled to the stack,
wherein each layer in the stack of MS layers is configured to provide a resonant response that enhances an interaction amplitude of an optical field at a different spectral band and to couple the resonant response with a WG, wherein the WG is configured to propagate the different spectral bands in a direction of a user's eye;
wherein each layer in the stack of MS layers comprises nano-structures made of a different material;
wherein the different material is different metal or dielectric material;
wherein the stack of MS layers comprises a first layer having gold nano-structures sized and spaced apart to provide a resonant response to an optical field at a first wavelength, a second layer having silver nano-structures sized and spaced apart to provide a resonant response to an optical field at a second wavelength being shorter than the first wavelength, and a third layer having aluminum nano-structures sized and spaced apart to provide a resonant response to an optical field at a third wavelength being shorter than the second wavelength.