US 12,298,469 B2
Single nanostructure-integrated metalens
Yunhe Lai, Shatin (HK); Haoyuan Bai, Shatin (HK); Qingyi Yang, Shatin (HK); and Jinbo Jiang, Ma On Shan (HK)
Assigned to Hong Kong Applied Science and Technology Research Institute Co., Ltd., Shatin (HK)
Filed by Hong Kong Applied Science and Technology Research Institute Co., Ltd., Shatin (HK)
Filed on May 17, 2022, as Appl. No. 17/746,508.
Prior Publication US 2023/0375747 A1, Nov. 23, 2023
Int. Cl. G02B 1/00 (2006.01); G02B 27/00 (2006.01); G02B 27/30 (2006.01); G01B 11/22 (2006.01); G01B 11/25 (2006.01)
CPC G02B 1/002 (2013.01) [G02B 27/0012 (2013.01); G02B 27/30 (2013.01); G01B 11/22 (2013.01); G01B 11/25 (2013.01); G02B 2207/101 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A metalens comprising:
an optical substrate having a transparent spectral range of at least 50 nm corresponding to an operation wavelength of a light emission device to be used with the metalens; and
a plurality of nanostructures integrated on at least one surface of the optical substrate in accordance with a phase distribution of a phase mapping configured for providing both light collimation functionality and structured light projection functionality, wherein the nanostructures are provided in at least 4 quantized lateral sizes and are spaced according to a period distance (P), wherein P is in a range from (λc*0.8)/2 to (λc*1.2)/2, and wherein λc is an operation wavelength region of the metalens.