US 11,874,476 B1
Metalens collimators and condensers
Gregory Kress, Las Vegas, NV (US); Abdoulaye Ndao, Brookline, MA (US); and Erik Shipton, Kirkland, WA (US)
Assigned to Imagia, Inc., Las Vegas, NV (US)
Filed by Imagia, Inc., Las Vegas, NV (US)
Filed on Aug. 16, 2023, as Appl. No. 18/451,031.
Claims priority of provisional application 63/371,608, filed on Aug. 16, 2022.
Int. Cl. G02B 27/30 (2006.01); G02B 1/00 (2006.01)
CPC G02B 27/30 (2013.01) [G02B 1/002 (2013.01)] 48 Claims
OG exemplary drawing
 
1. An optical device, comprising:
a light-emitting diode (LED) to generate optical radiation at an operational wavelength with a Lambertian emission profile relative to a planar face thereof; and
a metalens positioned to modify the Lambertian emission profile of the optical radiation from the LED to have a modified transmission profile, the metalens comprising:
a substrate, and
a two-dimensional array of passive pillars that extend from the substrate with varying pillar diameters,
wherein a diameter of each pillar and a subwavelength interelement spacing between adjacent pillars are selected functions of the operational wavelength to provide a target phase gradient that modifies a divergent emission profile of the optical radiation from the LED to have the modified transmission profile, and
wherein the LED is configured to generate the optical radiation with a Lambertian emission profile relative to the planar face.