Light source device

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.