| 摘要 |
PURPOSE:To enable the measurement of the distance up to a multidirectional matter, by allowing luminous flux to be incident on a rotary flat reflective mirror and scanning matter to be measured while the reflected luminous flux thereof is projected to said matter to be measured and reflecting the reflected luminous flux from the matter to be measured by the flat reflective mirror to form an image. CONSTITUTION:The parallel luminous flux emitted from a light source 1 is converged to the focal position of a convex lens 5 by a convex lens 2 are reflected by a flat reflective mirror 3 and a rotary flat reflective mirror 4 and the reflected luminous flux passes through the lens 5 to be converted to parallel luminous flux which is, in turn, incident on matter to be measured to be reflected therefrom. A part of the reflected luminous flux from said matter passes through the lens 5 and reflected by the mirror 4 to form an image on a photoelectric converter element 6. The image forming positions A, B are determined by the distance up to the matter. Therefore, if the relation between the image forming position on the element 6 and the distance up to the matter is preliminarily calculated, the distance up to the matter can be immediately detected from the output of the element 6. The mirror 4 has six flat reflective surfaces and, by succeedingly rotating the mirror 4 around a rotary shaft, the distance up to the matter present in a predetermined angular range can be repeatedly and continuously measured at a high speed successively using adjacent reflective surfaces. |
