US 11,719,951 B2
Polarization spectral filter, polarization spectral filter array, and polarization spectral sensor
Yeonsang Park, Seoul (KR); Hyochul Kim, Yongin-si (KR); Jaesoong Lee, Suwon-si (KR); and Younggeun Roh, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 11, 2020, as Appl. No. 17/95,477.
Claims priority of application No. 10-2019-0171993 (KR), filed on Dec. 20, 2019.
Prior Publication US 2021/0191141 A1, Jun. 24, 2021
Int. Cl. G02B 27/28 (2006.01); G01J 4/04 (2006.01); G02B 5/20 (2006.01); G02B 5/28 (2006.01)
CPC G02B 27/288 (2013.01) [G01J 4/04 (2013.01); G02B 5/203 (2013.01); G02B 5/286 (2013.01); G02B 5/288 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A polarization spectral filter comprising:
a first reflector;
a second reflector, the first reflector and the second reflector being disposed to face each other in a first direction; and
a grating layer disposed between the first reflector and the second reflector,
wherein the grating layer comprises a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged with each other in a second direction perpendicular to the first direction,
wherein each of the plurality of first grating elements includes a first dielectric material having a first refractive index,
wherein each of the plurality of second grating elements includes a second dielectric material having a second refractive index different from the first refractive index, and
wherein each of the first reflector and the second reflector is formed by stacking alternately two dielectric layers having different refractive indices, the different refractive indices including the first refractive index and the second refractive index.