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    • 4. 发明授权
    • Optical source with monitor
    • 光源带显示器
    • US6111903A
    • 2000-08-29
    • US103723
    • 1998-06-24
    • Jan IsakssonMichael Widman
    • Jan IsakssonMichael Widman
    • H01S5/00G11B7/125H01S5/022H01S5/026H01S5/0683H01S5/183H01S3/00H01S3/04
    • H01S5/02296G11B7/126G11B7/127H01S5/02228H01S5/0264H01S5/0683H01S5/183
    • An optical emission device includes a laser source having an emitting surface, and a sensor laterally adjacent the laser source generating an output signal dependent on the amount of light falling on its detection surface. A transparent waveguide is located in front of the emitting surface and extends generally parallel thereto such that light striking the waveguide in a direction normal to the emitting surface passes straight through the waveguide. A coupling medium is placed between the emitting surface and the waveguide. A light dispersant in the coupling medium causes a fraction of the laser light to strike the waveguide at an oblique angle so that it can enter the waveguide and be carried thereby to the sensor. An important advantage of the invention is that is uses inexpensive passive parts. The assembly process easy to implement, and the parts are stable during temperature changes. As a result only a small tracking error occurs.
    • 光发射装置包括具有发射表面的激光源和与激光源横向相邻的传感器,其根据落在其检测表面上的光量产生输出信号。 透明波导位于发射表面的前面并且大致平行于其延伸,使得沿着垂直于发射表面的方向照射波导的光直接穿过波导。 耦合介质放置在发射表面和波导之间。 耦合介质中的光分散剂使得一部分激光以倾斜角度撞击波导,使得其可以进入波导并被传送到传感器。 本发明的一个重要优点是使用廉价的无源部件。 组装过程易于实施,部件在温度变化时稳定。 因此,仅发生小的跟踪错误。