| 摘要 |
A rangefinder apparatus includes infrared light emitting diodes (IREDS) for projecting respective light beams toward a target object; and a position sensitive detector (PSD), disposed at a distance from the IREDS, having a light-detecting region for detecting respective reflected light beams of the light beams projected to the target object, the light-detecting region of the PSD being shaped substantially as a parallelogram with no rectangular corners. Since the light-detecting region of light-detecting means is shaped substantially as a parallelogram with no rectangular corners, the rangefinding accuracy can be improved while the manufacturing cost is restrained from increasing.
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