Patent ID: 9182103
Filing Date: 2015-11-10
Classification: F21V,H01S

Abstract:
1. A laser light source device comprising: a laser light source for emitting laser light through a laser emission aperture thereof; a condenser lens disposed in front of said laser light source in a laser emission direction to collect said laser light; and a light guide covering said laser emission aperture so as to guide said laser light, said light guide having a reflective surface, and said reflective surface extending from said laser light source to said condenser lens such that said reflective surface extends along an optical axis of said laser light; wherein said laser light source includes a laser diode having a pn joint surface and said reflective surface is oriented in a direction orthogonal to the pn joint surface of the laser diode; wherein said light guide has a second surface which is located opposite to said reflective surface with respect to the optical axis of said laser light, said second surface having one of (i) an antireflective property, and (ii) a sufficient separation distance from the optical axis of said laser light so as not to reflect said laser light; and wherein said laser light source device satisfies the following inequality: where θ