US 11,754,900 B2
Receiver for free-space optical communication
Takayuki Asai, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed on Aug. 18, 2020, as Appl. No. 16/996,514.
Claims priority of application No. 2019-153331 (JP), filed on Aug. 26, 2019.
Prior Publication US 2021/0063782 A1, Mar. 4, 2021
Int. Cl. H04B 10/00 (2013.01); G02F 1/137 (2006.01); G02F 1/133 (2006.01); H04B 10/11 (2013.01); G02B 27/14 (2006.01); H04B 10/60 (2013.01); G02B 26/08 (2006.01)
CPC G02F 1/137 (2013.01) [G02B 26/0816 (2013.01); G02B 27/144 (2013.01); G02F 1/13306 (2013.01); H04B 10/11 (2013.01); H04B 10/60 (2013.01)] 16 Claims
OG exemplary drawing
1. A receiver for free-space optical communication, the receiver comprising:
a beam splitter configured to split incident light into a first light beam and a second light beam, the first light beam and the second light beam traveling in different directions;
an imaging unit configured to capture an image of the first light beam;
a specifying unit configured to extract a signal light beam from the image of the first light beam captured by the imaging unit and specify a position of the signal light beam in the image;
a light-receiving device configured to receive the second light beam; and
a controller configured to control a blocker disposed between the beam splitter and the light-receiving device on a basis of the position of the signal light beam specified by the specifying unit to
allow only a limited portion of the second light beam to enter the light-receiving device, the limited portion of the second light beam including the signal light beam, and
prevent a remaining portion of the second light beam from entering the light-receiving device.