| CPC H01S 5/02253 (2021.01) [H01S 5/4075 (2013.01)] | 6 Claims |
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1. A light source device comprising:
a light source that emits laser light; and
an optical element that is disposed in an emission direction of the laser light, wherein:
the optical element is integrally formed from optical glass,
the light source includes a plurality of semiconductor laser elements that emit the laser light,
the optical element includes:
a first surface,
a second surface,
a light intensity converter integrally formed from the optical glass on the first surface, wherein the laser light enters the light intensity converter,
a light transmission part between the first surface and the second surface, wherein the light transmission part transmits the laser light, and
a collimator integrally formed from the optical glass on the second surface, wherein the collimator emits the laser light having transmitted through the light intensity converter,
the light intensity converter includes a plurality of lens arrays,
each of the plurality of lens arrays comprises a plurality of lens cells,
the collimator includes a plurality of collimator lenses,
the laser light emitted from a predetermined one semiconductor laser element among the plurality of semiconductor laser elements (1) enters a predetermined one lens array among the plurality of lens arrays, (2) is transmitted through a predetermined one collimator lens among the plurality of collimator lenses, and (3) is emitted,
the laser light entering the predetermined one lens array is transmitted through at least two lens cells among the plurality of lens cells included in the predetermined one lens array,
the laser light transmitted through the at least two lens cells comprises a uniform light intensity distribution, and
the laser light has a parallel light flux by passing through the predetermined one collimator lens.
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