US 12,443,039 B2
Eye information detection device and image display apparatus
Yuki Mamishin, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/756,726
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Nov. 12, 2020, PCT No. PCT/JP2020/042245
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2021/117409, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 2019-222596 (JP), filed on Dec. 10, 2019.
Prior Publication US 2023/0012288 A1, Jan. 12, 2023
Int. Cl. G02B 27/01 (2006.01); A61B 3/10 (2006.01); G02B 5/18 (2006.01); G02B 27/10 (2006.01); G02B 27/18 (2006.01)
CPC G02B 27/0172 (2013.01) [A61B 3/10 (2013.01); G02B 5/18 (2013.01); G02B 27/10 (2013.01); G02B 27/18 (2013.01)] 31 Claims
OG exemplary drawing
 
1. An eye information detection device, comprising:
at least two non-visible light sources having different light emission wavelengths, wherein
each non-visible light source of the at least two non-visible light sources is configured to emit non-visible light;
a diffractive optical element on an optical path of the non-visible light emitted from each of the at least two non-visible light sources and reflected by an eye; and
a light reception system configured to receive the non-visible light reflected by the eye and passed through the diffractive optical element, wherein
the light reception system includes at least two light reception elements and a bandpass filter,
the at least two light reception elements correspond to the at least two non-visible light sources,
the bandpass filter is on the optical path of the non-visible light between the diffractive optical element and each of the at least two light reception elements, and
the bandpass filter is configured to allow the non-visible light to pass therethrough.