Light source device
AssigneeNichia Corporation
InventorTadaaki Miyata
Life of this patent
Estimating the term…
Abstract
A light source device includes: a laser diode including 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; and 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.
Claims18
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.
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;
- and
- a submount supporting the laser diode, wherein a portion of the submount comprises a protrusion that serves as a light-shielding member that is disposed between the rear end surface of the laser diode and the photodetector and that is configured to shield at least a portion of light emitted from the rear end surface of the laser diode.
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;
- and
- 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 that propagates toward a region of the photodetector on which the laser light reflected at the reflecting member is incident.
Dependencies are inferred from the claim text.