US 11,867,955 B2
System for monitoring laser luminous power and method, and collimating lens thereof
Hao Wang, Hangzhou (CN); and Hai Tang Qin, Hangzhou (CN)
Assigned to HANGZHOU MO-LINK TECHNOLOGY CO. LTD, Hangzhou (CN)
Filed by HANGZHOU MO-LINK TECHNOLOGY CO. LTD, Hangzhou (CN)
Filed on Aug. 2, 2021, as Appl. No. 17/391,176.
Claims priority of application No. 202110349856.X (CN), filed on Mar. 31, 2021.
Prior Publication US 2022/0317390 A1, Oct. 6, 2022
Int. Cl. G02B 6/42 (2006.01)
CPC G02B 6/4214 (2013.01) [G02B 6/4206 (2013.01); G02B 6/4296 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A collimating lens for receiving a divergent beam and converting it to a collimated beam, wherein the collimating lens comprises a lens main body and the lens main body includes:
a light-incident surface into which the divergent beam is input;
a first light exit surface from which the collimated beam is output;
a second light exit surface;
a reflective surface which reflects a certain proportion of a light beam to the second light exit surface for output;
a cylindrical section; and
a truncated cone section,
wherein a free end of the cylindrical section forms the light-incident surface and a free end of the truncated cone section forms the first light exit surface; a protruding portion is formed along an optical axis direction at the free end of the truncated cone section, and the reflective surface is formed by plating the protruding portion with a reflective film; and a part of another end of the truncated cone section that protrudes from a side of the cylindrical section forms the second light exit surface.