Patent · US Active

Lighting device including a collimating metalens

US10408419B2 · kind B2 · utility

20Cited by

3References

8Claims

0Family size

Assignee

President and Fellows of Harvard College · US

Inventors

Francesco Aieta · Palo Alto, US
Federico Capasso · Westfield, US

Key dates

Filing date	Oct 26, 2018
Grant date	Sep 10, 2019
Priority date	—
Expiry date	Oct 26, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG02B2207/101
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Lighting devices including metalenses are disclosed. In some embodiments, the metalenses are in the form of a hybrid multi-region collimating metalens that includes a first region and a second region, wherein the hybrid multi-region collimating metalens is configured to collimate (e.g., visible) light incident thereon. In some instances the first region includes an array of first unit cells that contain sub-wavelength spaced nanostructures, such that the first region functions as a sub-wavelength high contrast grating (SWHCG), whereas the second region includes an array of second unit cell, wherein the array of second unit cells includes a near periodic annular arrangement of nanostructures such that the second region approximates the functionality of a locally periodic radial diffraction grating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.