Laser light source and an optical system for shaping light from a laser-bar-stack
OwnerXin Gao, Kazunori Shinoda +2inventors
InventorsXin Gao, Kazunori Shinoda, Masayuki Saitoh, Hiroshi Okamoto
Life of this patent
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Abstract
Refracting optical system 1 and 2 relatively shift the second laser beam groups together with respect to the first laser beam groups along the layering direction. The transmission/reflecting optical system for alignment 1R, 2R, 1S and 2S are used, so that the laser beam patterns comprised of the first and second laser beam groups which are emitted from the transmission/reflecting optical systems 1R, 2R, 1S and 2S are shaped to be long in the layering direction of the laser bar, and since separate optical systems are used for shift and alignment, respectively, an individual optical system has a simple configuration.
Claims10
A shaping optical system for a laser bar layered product for shaping a laser beam from a laser bar layered product in which a plurality of laser bars, each of which is comprised of a plurality of semiconductor laser elements arrayed one-dimensionally, are layered along a direction which is vertical to both the array direction of said semiconductor laser elements and the laser beam traveling direction, comprising:
- a refracting optical system in which, when a first laser beam group is the laser beam group at one side of the laser beam groups output from said laser bar layered product with a line segment along said direction of layering as a boundary line and a second laser beam group is the beam group on the other side, said second laser beam group is relatively shifted together with respect to said first laser beam group along the direction of said layering;
- and
- a transmission/reflecting optical system which transmits and reflects said first and second laser beam groups so that said shifted first and second laser beam groups align along said direction of layering.
A laser light source comprising:
- a laser-bar-stack emitting longitudinal laser beam patterns, the longitudinal laser beam patterns being aligned along the stack direction;
- and
- means for distributing of the longitudinal laser beam patterns into a stepwise pattern;
- and
- means for closing up each of the stepwise patterns along the longitudinal direction.
Dependencies are inferred from the claim text.