Laser unit
AssigneeCanon Kabushiki Kaisha
InventorShin Mogi
Life of this patent
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Abstract
A laser unit includes a semiconductor laser tip mounted on a substrate of a material such as Si, a monitoring photodiode, and a laser driving integrated circuit, all of which are fixed to a base member of a material, such as metal, by soldering or the like. Further, a collimator lens is fixed to the base member by using, for example, ultraviolet ray hardening resin. The base member is provided with a step or slope portion, or a cut-away portion, formed at its laser-light-emission end, whereby the laser unit can be made compact and the distance between the semiconductor laser tip and the laser driving circuit can be shortened.
Claims16
A laser unit comprising:
- a semiconductor laser tip;
- a laser driving integrated circuit for driving said semiconductor laser tip;
- a condenser lens for condensing a laser light beam emitted by said semiconductor laser type;
- and
- a single base, said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein.
A laser scanning apparatus comprising:
- a laser unit, said laser unit comprising a semiconductor laser tip, a laser driving integrated circuit for driving said semiconductor laser tip, a condenser lens for condensing a laser light beam emitted by said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein;
- and
- scanning means for deflectively scanning the condensed laser light beam.
Dependencies are inferred from the claim text.