| 摘要 |
PURPOSE:To enable high-accuracy focus detection by bending an optical path through a reflecting mirror, arranging one element of a detecting means on this optical path, and moving the one element and the optical element which includes the reflecting mirror in the moving direction of the focus adjusting lens of photographic system focus detection. CONSTITUTION:The reflecting mirror 6 is introduced as part of a photodetecting means, the optical axis L2 of a photodetection lens 5 is bent, and the photodetection part 7 which is one element for focus detection is arranged on the bent optical path on a substrate 8. Thus, the focus group 1a of the photographic system 1 and the optical element 10 are both moved in the same direction. Consequently, a focus detector is obtained which is simplified in mechanism and capable of high-accuracy focus detection while maintaining the size of the whole camera with good balance. |
