| 摘要 |
PROBLEM TO BE SOLVED: To detect the angle of a galvanometer mirror by only a small-sized light quantity sensor. SOLUTION: A hole is bored in a deflector, the sensor detects light passing through the hole whose opening area substantially varies by a swing, and the angle of the deflector is detected by using the detected quantity of the light. COPYRIGHT: (C)2005,JPO&NCIPI
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