US 12,481,165 B2
Embedded transmissive diffractive optical elements
James Peter Drummond Downing, Doune (GB)
Assigned to STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, Marlow (GB)
Filed by STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, Marlow (GB)
Filed on Jun. 16, 2022, as Appl. No. 17/842,669.
Application 17/842,669 is a division of application No. 16/173,495, filed on Oct. 29, 2018, granted, now 11,391,957.
Prior Publication US 2022/0317466 A1, Oct. 6, 2022
Int. Cl. G02B 27/09 (2006.01); G02B 1/11 (2015.01); G02B 1/113 (2015.01); G02B 1/115 (2015.01); G02B 1/118 (2015.01)
CPC G02B 27/0955 (2013.01) [G02B 1/11 (2013.01); G02B 1/113 (2013.01); G02B 1/115 (2013.01); G02B 1/118 (2013.01); G02B 27/09 (2013.01); G02B 27/0944 (2013.01); G02B 27/0961 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device, comprising:
a lens including:
an immersion material having a first surface and a second surface opposite the first surface in a first direction;
a first phase shift region extending between the first surface and the second surface;
a second phase shift region laterally adjacent to the first phase shift region and extending between the first surface and the second surface;
a first phase shift layer in the immersion material and extending in the first phase shift region and the second phase shift region, the first phase shift layer being closer to the first surface than the second surface; and
a second phase shift layer in the immersion material and extending in the second phase shift region, wherein the first phase shift layer is between the second phase shift layer and the first surface, wherein the first phase shift layer is separated from the second phase shift layer in the first direction in the second phase shift region by a portion of the immersion material, wherein the second phase shift layer has a lateral end positioned so that the second phase shift layer does not extend into the first phase shift region.