Patent ID: 9431795
Filing Date: 2016-08-30
CPC Classification: G02B,G03B,H01S,H04N

Claim Text:
1. A laser beam-combining optical device comprising: a plurality of semiconductor laser arrays; a reflective element configured to reflect a laser light beam emitted from one semiconductor laser array of said plurality of semiconductor laser arrays; and a condenser unit configured to focus, to a focus point, the laser light beams emitted from respective ones of said plurality of semiconductor laser arrays, between said reflective element and said focus point, wherein when laser light beams emitted from respective ones of said plurality of semiconductor laser arrays are focused on a single focus point, the laser light beam emitted from said semiconductor laser array is reflected by said reflective element, and is then focused on said focus point, distances from respective ones of said plurality of semiconductor laser arrays to said focus point along optical axes of the laser light beams are equal to one another, the laser light beam reflected by said reflective element reaches said focus point without changing an angle of the optical axis of the laser light beam after being reflected by said reflective element, the laser light beam not reflected by said reflective element reaches said focus point without changing an angle of the optical axis of the laser light beam after being emitted from a corresponding one of said plurality of semiconductor laser arrays, and distances from respective ones of said plurality of semiconductor laser arrays to an incident surface of said condenser unit along optical axes of the laser light beams are equal to one another.