| 摘要 |
PURPOSE:To enhance range finding accuracy, by providing light receiving elements so as to arrange the same almost along the straight line connecting the focal point of the return light from the nearest point possible to photograph and that of the return light from the remotest point where infrared rays can reach. CONSTITUTION:A point 9 is focal point of rays passing through a light receiving lens 4 among return rays of infrared rays allowed to irradiate the subject present at the nearest point 7 while a point 10 is that of rays passing through the light receiving lens 4 among return rays of infrared rays allowed to irradiate the subject present at the remotest point 8. The light receiving surfaces of light receiving element 6 are arranged on the straight line connecting both focal points 9, 10 in a line. |
