Semiconductor laser device and optical pickup device
AssigneeSharp Kabushiki Kaisha
InventorKazunori Matsubara
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Abstract
The present invention provides a semiconductor laser devices of hologram laser type, constructed so that the configuration of the optical elements barely changes even if its package expands due to a rise in temperature or moisture absorption. In the semiconductor laser device, a body frame made of an insulating resin contains a semiconductor laser element, a mirror, a photo-detecting element for reading signals, a mirror-mounting base and a detector-mounting base. Also, a holographic element is mounted on the top of the sidewall of the body frame. The mirror-mounting base and the detector-mounting base are made of a resin, wherein each base is integrally formed with the base plate of the body frame and is separated from the sidewall of the body frame.
Claims10
A semiconductor laser device comprising:
- a semiconductor laser element for generating a laser beam;
- a photo-detecting element for receiving the laser beam;
- a holographic element for guiding the laser beam generated by the semiconductor laser element to the outside and for guiding the laser beam reflected by an external object to the photo-detecting element;
- a resin frame having a base plate and a sidewall extending along the edge of the base plate, in which the semiconductor laser element and the photo-detecting element are contained in a space formed by the base plate and the sidewall, and the holographic element is mounted on a top of the side wall;
- and
- a lead frame extending from the outside of the body frame into the space formed by the base plate and the sidewall and being electrically connected to the semiconductor laser element and the photo-detecting element, wherein:
- the photo-detecting element is mounted on a detector-mounting base;
- and
- the detector-mounting base is separated from the sidewall of the body frame.
Dependencies are inferred from the claim text.