| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a three-dimensional laser range finder with a wide measuring range. Ž<P>SOLUTION: A laser sensor 10 includes: a laser light source 12; a polygon mirror 30 having a small mirror face group; and a two-dimensional scanning mirror unit 20 having a swinging mirror 22 reflected while two-dimensionally changing an angle so as to direct a laser to each of the small mirror face group. The small mirror face group of the polygon mirror 30 radiantly extends their normal group in a plane. In the two-dimensional scanning mirror unit 20, reflection light of the laser changes an angle of the swinging mirror 22 around a first axis so that the normal group is sequentially directed to each of the small mirror face group radiantly extending in the plane, next, changes the angle of the swinging mirror around a second axis intersected with the first axis so that the normal group is sequentially directed to the small mirror face group radiantly extending in the other plane. The laser sensor 10 attains a wide angle scanning range by irradiating each of the small mirror face group radiantly extended by the normal group in the plane with a laser. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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