US 12,072,234 B2
Electromagnetic wave detection apparatus and information acquisition system
Hiroyuki Minagawa, Yokohama (JP); and Eri Takeuchi, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 17/047,118
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Apr. 17, 2019, PCT No. PCT/JP2019/016477
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2019/216140, PCT Pub. Date Nov. 14, 2019.
Claims priority of application No. 2018-090178 (JP), filed on May 8, 2018.
Prior Publication US 2021/0148752 A1, May 20, 2021
Int. Cl. G01C 3/08 (2006.01); G01J 1/04 (2006.01); G01J 1/44 (2006.01); G01S 7/481 (2006.01); G01S 17/08 (2006.01); G02B 26/08 (2006.01); G02B 26/10 (2006.01)
CPC G01J 1/0414 (2013.01) [G01J 1/44 (2013.01); G01S 7/4814 (2013.01); G01S 17/08 (2013.01); G02B 26/08 (2013.01); G02B 26/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electromagnetic wave detection apparatus comprising:
an irradiator that radiates electromagnetic waves to a detection object;
a first propagation unit that includes a reference surface and a plurality of pixels, wherein the each of the pixels transits to a first state to cause the electromagnetic waves incident on the reference surface to propagate in a predetermined direction or a second state to cause the electromagnetic waves to propagate in a direction different from the predetermined direction;
a detector that includes a detection surface and detects reflected waves incident on the detection surface, wherein the reflected waves are the electromagnetic waves radiated from the irradiator and reflected on the detection object; and
a second propagation unit that includes a first surface opposing the reference surface, a second surface opposing the detection surface, and a third surface intersecting the first surface and the second surface,
wherein the third surface causes electromagnetic waves propagating in a first direction intersecting the third surface to propagate in a second direction intersecting the first surface,
the first surface causes electromagnetic waves propagating in a second direction to be incident on the reference surface,
the first surface causes electromagnetic waves re-incident from the reference surface to propagate in a third direction intersecting the third surface by the pixel transited to the first state,
the third surface causes electromagnetic waves propagating in the third direction to propagate in a fourth direction intersecting the second surface,
the second surface emits electromagnetic waves propagating in the fourth direction to the detection surface, and
the third surface separates electromagnetic waves progressing in the first direction into the electromagnetic waves propagating in the second direction and the electromagnetic waves reflected on the third surface, based on their wavelengths.