| 摘要 |
PROBLEM TO BE SOLVED: To provide an active distance measurement apparatus that cannot be affected by the chipping of a reflection spot image and has high distance measurement precision. SOLUTION: The distance measuring apparatus O comprises a light projection section for projecting luminous flux to an object; a light reception section for receiving the luminous flux that is reflected by the object and returns for outputting a detection signal; and an operation section for measuring the distance to the object based on the detection signal. The light projection section includes a light-emitting device 1 for radiating the luminous flux according to a drive current; a lens 2 for projecting the luminous flux along a light axis for forming a prescribed light spot; and a filter 21 for limiting the width of the light spot while being interposed in the light axis. The light reception section is arranged separately from the light-emitting device 1 along the direction of a baseline B orthogonally crossing the light axis and includes a light receiving element 5 for receiving the returned light sport after being reflected by the object. The filter 21 comprises vertical slits and limits the width of the light spot along a direction orthogonally crossing the direction of the baseline B. COPYRIGHT: (C)2007,JPO&INPIT |
