	US 12,231,749 B2
	Sensing with liquid crystal polarization holograms and metasurface
Qing Chao, Redmond, WA (US); Lu Lu, Kirkland, WA (US); Xinqiao Liu, Medina, WA (US); Hao Yu, Kent, OH (US); and Junren Wang, Redmond, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Jul. 14, 2022, as Appl. No. 17/865,223.
Claims priority of provisional application 63/226,916, filed on Jul. 29, 2021.
Prior Publication US 2023/0037261 A1, Feb. 2, 2023
Int. Cl. H04N 23/11 (2023.01); G02B 1/00 (2006.01); G02B 3/00 (2006.01); G02B 5/20 (2006.01); G02B 5/30 (2006.01); G02B 5/32 (2006.01); H04N 23/00 (2023.01)

CPC H04N 23/11 (2023.01) [G02B 3/0056 (2013.01); G02B 5/201 (2013.01); G02B 5/32 (2013.01); G02B 1/002 (2013.01); G02B 5/3016 (2013.01); H04N 23/00 (2023.01)]

16 Claims

14. An image sensor comprising:

imaging pixels including a first subpixel configured to sense image light and a second subpixel configured to sense the image light;

a patterned liquid crystal polarization hologram (LCPH) layer having microlens regions disposed over the imaging pixels, wherein the microlens regions are configured to focus the image light to the first subpixel and the second subpixel of the imaging pixels; and

a wavelength filtering layer disposed between a semiconductor layer of the imaging pixels and the patterned LCPH layer.