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首页> 外文会议>Conference on Machine Vision Applications in Industrial Inspection Ⅹ Jan 21-22, 2002, San Jose, USA >Optical Pickup Adjustment System Using a Passive Alignment Method
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Optical Pickup Adjustment System Using a Passive Alignment Method

机译：使用无源对准方法的光拾取器调节系统

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摘要

The optical pickup of a magneto-optical drive is constructed of millimeter-size optical components, including a laser diode (LD), a collimating lens (CL), a polarizing beam splitter, some kinds of prisms, and photo detectors (PD). Each component must be assembled with micrometer-order accuracy. In particular, the astigmatism, which is adjusted by changing the position of the CL, must be within 0.65 micrometers in the optical axis direction. To enable the CL position to be adjusted quantitatively, we developed an adjustment method that uses passive alignment. We estimated the astigmatism by analyzing an image of the LD, which is acquired through the CL by illuminating the LD with the polarized light. We developed an optical-pickup adjustment system using the proposed method and tested its effectiveness experimentally. The results showed that this system can be used to adjust the accuracy to within 0.65 micrometers. Because the image of the LD and the PD are acquired clearly by this system, it should be useful for not only adjusting the optical pickup but also for visually inspecting the LD and PD.
机译：磁光驱动器的光拾取器由毫米大小的光学组件构成，包括激光二极管（LD），准直透镜（CL），偏振分束器，某些棱镜和光电探测器（PD）。每个组件必须以微米级的精度组装。特别地，通过改变CL的位置来调节的像散在光轴方向上必须在0.65微米以内。为了使CL位置能够定量调整，我们开发了一种使用被动对准的调整方法。我们通过分析LD的图像来估计散光，该图像是通过用偏振光照射LD通过CL获得的。我们使用提出的方法开发了一种光学拾波器调节系统，并通过实验测试了其有效性。结果表明，该系统可用于将精度调整到0.65微米以内。因为通过该系统可以清晰地获取LD和PD的图像，所以它不仅对调节光学拾取器有用，而且在视觉上检查LD和PD也应有用。

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