US 11,899,135 B2
Light detection and ranging device
Chang Hyuck Lee, Seoul (KR); and Young Seop Moon, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Filed by LG INNOTEK CO., LTD., Seoul (KR)
Filed on Apr. 5, 2021, as Appl. No. 17/222,663.
Application 17/222,663 is a continuation of application No. 15/749,907, granted, now 10,996,321, previously published as PCT/KR2016/008541, filed on Aug. 3, 2016.
Claims priority of application No. 10-2015-0109454 (KR), filed on Aug. 3, 2015.
Prior Publication US 2021/0223369 A1, Jul. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01C 3/08 (2006.01); G01S 7/481 (2006.01); G01S 17/89 (2020.01); G02B 27/30 (2006.01); G02B 3/00 (2006.01); G02B 27/10 (2006.01); G01S 17/42 (2006.01); G01S 17/10 (2020.01); G01S 7/487 (2006.01); G02B 26/08 (2006.01); G02B 27/00 (2006.01); G02B 27/12 (2006.01)
CPC G01S 7/4817 (2013.01) [G01S 7/4812 (2013.01); G01S 7/4814 (2013.01); G01S 7/4815 (2013.01); G01S 7/4876 (2013.01); G01S 17/10 (2013.01); G01S 17/42 (2013.01); G01S 17/89 (2013.01); G02B 3/00 (2013.01); G02B 26/0833 (2013.01); G02B 27/0087 (2013.01); G02B 27/10 (2013.01); G02B 27/126 (2013.01); G02B 27/30 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical device comprising:
a beam transmitter configured to generate a first beam for photographing a certain area;
a beam receiver configured to sense a second beam returning from the certain area;
a beam splitter configured to separately transmit the first beam and the second beam;
a detector configured to change the optical axis of the first beam by a first steering angle, transmit the first beam having the changed optical axis and receive the second beam;
a quarter-wave plate (QWP) positioned between the beam splitter and the detector to prevent scattering of the first beam and the second beam; and
a reflector positioned between the QWP and the beam splitter.