| 摘要 |
PURPOSE:To speed up a scanning and to increase the amount of information per unit time by allowing a laser light beam which is outputted when passed through an optical system to vary spatially with time, and giving a light beam group a geometrically constant mutual relation. CONSTITUTION:A 45 deg. slanting rotary reflecting mirror 6 which has a 45 deg. slanting reflecting plane is installed on a rotary shaft equipped with rotary encoders which receive one laser light beam and are rotated by an electric motor 8, etc. and a plane reflecting mirror 2 which receives reflected light from the rotary reflecting mirror 6 and has a 45 deg. slanting reflecting surface 2a is provided on one side of a laser scanner base 1 which is moved forth and back by an extension shaft. Further, a parallel parabolic mirror 3 which receives reflected light from the plane reflecting mirror 2 and has a vertical parabolic reflecting surface 3a is installed opposite on the other side of the laser scanner 1, thereby emitting such a scanning laser light beam that the line of intersection with a plane vertical in the traveling direction of the light beam is linear. For the purpose, this laser light is used to measure the distance to a body corresponding to said plane (laser scanning surface) and then information on the shape of the body is obtained. Consequently, the operation is speeded up and the amount of information obtained per unit time is increased. |
