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 Semiconductor light emitting device and optical disc apparatus using the same

Details
Inventors: Abe, Hiroaki; Agatsuma, Shinichi; Hoshi, Nozomu; Suzuki, Youichi;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Louie; Wai-Sing
Assistant Examiner:
Attorney, Agent or Firm: Depke; Robert J. Rockey, Depke, Lyons & Kitzinger LLC

AlGaInP system laser device (24) and AlGaAs system laser device (26) are arranged so that respective stripes (28, 30) are parallel to each other. The AlGaInP system laser device (24) is placed to (011) plane (22b) side from the centerline of the substrate and the AlGaAs system laser device (26) is placed to the (0{overscore (1)}{overscore (1)}) plane (22a) side from the centerline of the substrate when viewed from the main emitting plane (01{overscore (1)}) (22c) side of laser light. Substrate (22) is an off substrate and inclines from the (0{overscore (1)}{overscore (1)}) plane (22a) toward the (011) plane (22b) with respect to the (100) plane at a certain angle (.theta. off) within the range of 2 degrees and 15 degrees. Optical axis L.sub.1 of the AlGaInP system laser device (24) is parallel to optical axis L.sub.2 of the AlGaAs system laser device (26) and approaches at an angle of about 0.5 degrees.

DETAILED DESCRIPTION The invention claimed is: 1.
An optical disc apparatus at least recording or reproducing information on/from plural kinds of optical discs using a semiconductor light emitting device as a light source, wherein the semiconductor light emitting device includes at least a pair of light emitting elements having a main emitting plane in the same direction on a main surface of a common substrate in adjacent position, comprising: a substrate in which side surfaces thereof incline at a certain angle (off angle) in a clockwise direction with respect to a crystal axis direction, viewed from a main emitting plane side; a first light emitting element having a trapezoidal cross section in which the left side of the opposite side surfaces is gentler than the right side thereof when viewed from a main emitting plane side; and a second light emitting element which is a counterpart of the first light emitting element is formed on the left side of the first light emitting element when viewed from a main emitting plane side.
2.
An optical disc apparatus according to claim 1, wherein the first light emitting element and the second light emitting element are strip shape and parallel to each other, and a central axis of the strip-shaped second light emitting element corresponds to an optical axis direction, whereas an optical axis of the first light emitting element corresponds to a central axis of the strip shape thereof or approaches to an optical axis side of the second light emitting element.
3.
An optical disc apparatus according to claim 2, wherein main emitting planes of the first light emitting element and the second light emitting element are (01{overscore (1)}) plane and when viewed from the main emitting plane side, both sides of the substrate incline from the (0{overscore (11)}) plane toward the (011) plane direction with respect to a crystal axis (100) direction and the first light emitting element and the second light emitting element are arranged on the (011) plane side and the (0{overscore (11)}) plane side, respectively


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