| 摘要 |
PROBLEM TO BE SOLVED: To provide a range-finding device which is constituted so that high range-finding accuracy is secured by obtaining the degree of freedom for designing a light receiving part and which contributes to miniaturization by securing the degree of freedom for arranging the respective component members. SOLUTION: This range-finding device is constituted so that luminous flux for range-finding is projected toward an object from a reflection type light projector 40 and the reflected light of the luminous flux for range-finding from the object is received by a PSD 44. Based on an output from the PSD 44, a signal related on a distance to the object from the range-finding device is calculated by a CPU. The projector 40 is constituted by being provided with an IRED 21 and a concave reflection mirror 17 condensing light from the IRED 21 and unidirectionally outputting it. Besides, at least one part of circuit parts related on a range-finding action is arranged at the rear side of the mirror 17. |
