US 12,276,816 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 Jul. 14, 2023, as Appl. No. 18/352,965.
Application 18/352,965 is a division of application No. 17/520,317, filed on Nov. 5, 2021, granted, now 11,747,529.
Application 17/520,317 is a division of application No. 16/594,742, filed on Oct. 7, 2019, granted, now 11,187,837, issued on Nov. 30, 2021.
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 2023/0367047 A1, Nov. 16, 2023
Int. Cl. G02B 5/18 (2006.01); G02B 1/115 (2015.01); G02B 1/14 (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)] 20 Claims
OG exemplary drawing
 
1. A lens, comprising:
a substrate;
a plurality of first microstructures on the substrate, the plurality of first microstructures having a first refractive index;
a protective layer on the substrate and the plurality of first microstructures, the protective layer including a first sublayer having a second refractive index and a second sublayer having a third refractive index;
a planar surface formed by the plurality of first microstructures and the second sublayer; and
a coating on the planar surface.