US 11,747,529 B2
Wafer level microstructures for an optical lens
Kevin Channon, Edinburgh (GB); James Peter Drummond Downing, Doune (GB); and Andy Price, Bonnyrigg (GB)
Assigned to STMicroelectronics (Research & Development) Limited, Marlow (GB)
Filed by STMicroelectronics (Research & Development) Limited, Marlow (GB)
Filed on Nov. 5, 2021, as Appl. No. 17/520,317.
Application 17/520,317 is a division of application No. 16/594,742, filed on Oct. 7, 2019, granted, now 11,187,837.
Application 16/594,742 is a division of application No. 15/357,837, filed on Nov. 21, 2016, granted, now 10,473,834, issued on Nov. 12, 2019.
Prior Publication US 2022/0057553 A1, Feb. 24, 2022
Int. Cl. G02B 5/18 (2006.01); G02B 1/14 (2015.01); G02B 1/115 (2015.01); G01S 7/481 (2006.01)
CPC G02B 5/1866 (2013.01) [G02B 1/115 (2013.01); G02B 1/14 (2015.01); G02B 5/1847 (2013.01); G01S 7/4811 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lens, comprising:
a substrate;
a plurality of microstructures on the substrate, the plurality of microstructures having a plurality of different heights and widths, each of the plurality of microstructures including;
a plurality of portions of a first material having a first refractive index; and
a plurality of coatings that are optical filter coatings or anti-reflective coatings, the plurality of portions being spaced apart from the substrate by one of the plurality of coatings, each of the plurality of portions being spaced from another portion of the plurality of portions by a respective coating of the plurality of coatings; and
a protective layer on the plurality of microstructures, the protective layer being a second material having a second refractive index that is different from the first refractive index.