| 摘要 |
PROBLEM TO BE SOLVED: To provide a range-finding device capable of reducing a range-finding error. SOLUTION: Luminous flux is projected from an IRED 4 toward a range- finding object, the reflection light of the projected luminous flux is received by a PSD 5, a signal that is outputted from the PSD is subjected to operation processing by signal processing circuits 11 and 12 and an operation circuit 14 before being outputted as distance information. An integration circuit 15 integrates a signal that is outputted from the operation circuit 14 and outputs a signal according to the integration result. A CPU 1 measures the time required for the second integration based on a signal that is outputted from the integration circuit 15 and detects distance to the range-finding object based on the result. In this case, it is judged that an integration result signal is outputted after a specific time has passed after the integration result signal was outputted from the integration circuit 15. |
