| 摘要 |
An optical fiber quadrant detector (10) includes a sensor head (22) wherein each quadrant (A, B, C, D) thereof includes a plurality of light transmitting optical fibers (26) and a plurality of light receiving optical fibers (20). The light transmitting optical fibers (26) are equally distributed among the quadrants (A, B, C, D) as are the light receiving optical fibers (20). Hence, the outputs of the lights receiving optical fibers (20) are indicative of the alignment of a workpiece to the sensor head (22).
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