US 11,705,691 B2
Light source device
Tadaaki Miyata, Yokohama (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on May 31, 2022, as Appl. No. 17/828,559.
Application 17/828,559 is a continuation of application No. 17/060,881, filed on Oct. 1, 2020, granted, now 11,381,057.
Claims priority of application No. 2019-190888 (JP), filed on Oct. 18, 2019.
Prior Publication US 2022/0294180 A1, Sep. 15, 2022
Int. Cl. H01S 5/026 (2006.01); H01S 5/02257 (2021.01); H01S 5/062 (2006.01)
CPC H01S 5/0264 (2013.01) [H01S 5/02257 (2021.01); H01S 5/06236 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light source device comprising:
a laser diode comprising an emission end surface for emitting laser light and a rear end surface opposite to the emission end surface;
a reflecting member that reflects a portion of the laser light emitted from the emission end surface of the laser diode;
a photodetector configured to detect light that is reflected at the reflecting member;
a light-shielding member disposed between the rear end surface of the laser diode and the photodetector, the light-shielding member configured to shield at least a portion of light emitted from the rear end surface of the laser diode; and
a glass cap covering the laser diode and the light-shielding member, the glass cap comprising a front glass wall that serves as the reflecting member, and a rear glass wall located between the light-shielding member and the photodetector.