US 11,933,897 B2
Distance measurement device
Kazuhisa Ide, Aichi (JP); Masaomi Inoue, Aichi (JP); Hirotaka Ueno, Osaka (JP); Kouichi Kumamaru, Osaka (JP); Masahiro Shiihara, Aichi (JP); Kouichi Bairin, Aichi (JP); Takashi Haruguchi, Aichi (JP); and Kiyoshi Hibino, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Oct. 1, 2020, as Appl. No. 17/061,561.
Application 17/061,561 is a continuation of application No. PCT/JP2019/013352, filed on Mar. 27, 2019.
Claims priority of application No. 2018-095690 (JP), filed on May 17, 2018.
Prior Publication US 2021/0018625 A1, Jan. 21, 2021
Int. Cl. G01S 17/10 (2020.01); G01S 7/481 (2006.01); G02B 26/10 (2006.01)
CPC G01S 17/10 (2013.01) [G01S 7/4812 (2013.01); G01S 7/4814 (2013.01); G01S 7/4817 (2013.01); G02B 26/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A distance measurement device for measuring a distance to an object that exists in a distance measurement region, by rotating laser light about a rotation center axis, the distance measurement device comprising:
a mirror disposed so as to be tilted relative to the rotation center axis;
a drive unit configured to rotate the mirror about the rotation center axis;
a photodetector configured to detect reflected light, of the laser light, reflected in the distance measurement region; and
a condensing lens disposed on the rotation center axis and configured to condense the reflected light reflected by the mirror, on the photodetector, wherein
the mirror has a shape elongated in one direction and is disposed such that a short axis thereof is tilted relative to the rotation center axis in a direction parallel to a plane including the rotation center axis, and
a width in a short-axis direction of the mirror is smaller than a width of a lens portion of the condensing lens as viewed in a direction parallel to the rotation center axis.