| 摘要 |
PROBLEM TO BE SOLVED: To provide a finder device capable of performing range-finding with high accuracy from a long distance to a short distance in a device where a range-finder and an autofocusing unit are combined and the base length of both of them is made equal so that an incident window may be integrated. SOLUTION: A luminous flux from a subject is guided by an objective lens 10 and photoelectrically converted at a photodetector part 16a on an image sensor 16, then the luminous flux from the subject is guided by an objective lens 22 arranged by a specified distance apart from the lens 10 and photoelectrically converted at a photodetector part 16b. Furthermore, light is projected to the subject by an IRED 32 in order to illuminate the subject and the reflected luminous flux reflected from the subject is photoelectrically converted at a photodetector part 16c through the lens 10. Then, the range- finding at the comparatively long distance is performed according to detection signals photoelectrically converted by the photodetector parts 16a and 16b and the range-finding at the comparatively short distance is performed according to the detection signal photoelectrically converted by the photodetector part 16c. |
