| 摘要 |
PROBLEM TO BE SOLVED: To prevent outputting wrong ranging information owing to noises and errors in a ranging device performing triangular ranging wherein an object is irradiated with a beam. SOLUTION: Signals corresponding to ON/OFF of IRED 19 are fed from a sensor array 10 to a control circuit 18 via an integrating/storing section 11, a shift gate 12, a linear CCD 13, a ring CCD 14 and an output section 17. When a signal corresponding to OFF is larger than a signal corresponding to ON in its level in comparison with both signals, ranging information is judged to be null. |
