US 12,443,048 B2
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., Mountain View, CA (US)
Filed by Imagia, Inc., Las Vegas, NV (US)
Filed on Jan. 15, 2024, as Appl. No. 18/412,724.
Application 18/412,724 is a continuation of application No. 18/451,031, filed on Aug. 16, 2023, granted, now 11,874,476.
Claims priority of provisional application 63/371,608, filed on Aug. 16, 2022.
Prior Publication US 2024/0151983 A1, May 9, 2024
Int. Cl. G02B 27/30 (2006.01); G02B 1/00 (2006.01)
CPC G02B 27/30 (2013.01) [G02B 1/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical device, comprising:
a light-emitting diode (LED) to generate optical radiation at an operational wavelength with a divergent emission profile relative to a planar face thereof; and
a metalens positioned proximate to the planar face of the LED to modify the divergent emission profile of the optical radiation from the LED to have a modified transmission profile, the metalens comprising:
a two-dimensional array of passive pillars that extend from the planar face of the LED with varying pillar diameters,
wherein a diameter of each pillar and a subwavelength interelement spacing between adjacent pillars are selected as functions of the operational wavelength to provide a target phase gradient that modifies the divergent emission profile of the optical radiation from the LED to have the modified transmission profile.