Patent ID: 11874476
Assignee: IMAGIA, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 36:
37. An optical system, comprising:
a two-dimensional array of light-emitting diodes (LEDs), wherein each LED is configured to emit optical radiation at an operational wavelength with a divergent emission profile relative to a planar face thereof; and
a two-dimensional array of metalenses positioned as a layer to receive optical radiation from the two-dimensional array of LEDs,
wherein each metalens is positioned relative to one of the LEDs to modify the divergent emission profile of the emitted optical radiation to have a modified transmission profile,
wherein each metalens comprises a two-dimensional array of passive pillars that extend from a substrate with a radially symmetric pattern of varying pillar diameters, and
wherein a diameter of each pillar and a subwavelength interelement spacing between adjacent pillars are selected as functions of the operational wavelength of an associated LED to provide a target phase gradient that modifies the divergent emission profile of the emitted optical radiation to have the modified transmission profile.