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    • 1. 发明授权
    • Temperature-compensated optical pick-up device
    • 温度补偿光学拾取装置
    • US4815059A
    • 1989-03-21
    • US15115
    • 1987-02-17
    • Masahiko NakayamaHiroshi Goto
    • Masahiko NakayamaHiroshi Goto
    • G11B7/09G11B7/12G11B7/125G11B7/135H01S3/00G11B7/00
    • G11B7/0916G11B7/1376G11B7/13922G11B2007/13727H01S3/005
    • A semiconductor laser device includes a semiconductor laser for emitting a laser beam, a coupling lens for collimating the laser beam as passing therethrough and a supporting member for supporting the laser and the coupling lens. As the ambient temperature changes, the supporting member either expands or contracts, thereby varying the distance between the laser and the coupling lens. However, it is so structured that the focal distance of the coupling lens varies in accordance with a change in the wavelength of the laser beam emitted from the laser which is caused by the change in the ambient temperature, so that the change in the distance between the laser and the coupling lens is effectively cancelled by the change in the focal distance of the coupling lens, whereby the laser beam passing through the coupling lens remains collimated even if the ambient temperature changes.
    • 半导体激光装置包括用于发射激光束的半导体激光器,用于准直激光束的耦合透镜,以及用于支撑激光器和耦合透镜的支撑部件。 随着环境温度的变化,支撑构件膨胀或收缩,从而改变激光与耦合透镜之间的距离。 然而,其结构使得耦合透镜的焦距根据由环境温度的变化引起的从激光器发射的激光束的波长的变化而变化,使得距离 通过耦合透镜的焦距的变化有效地消除了激光和耦合透镜,由此即使环境温度改变,通过耦合透镜的激光束保持准直。