ROTARY POLYHEDRON TYPE TWO-AXIS SCANNING MIRROR

摘要

PURPOSE:To obtain a two-axis scanning mirror light in weight and with easy scanning control by low electric power by arranging plural reflecting mirrors cylindrically while varying their inclination in the axial direction by the prescribed angle each in order. CONSTITUTION:In case of rotating a rotary polyhedron type two axis scanning mirror 11 at a fixed low speed, a reflecting mirror 11-1 first scans the object in the east and west directions at the angle of view corresponding to the number thereof, the electromagnetic wave from the object is detected by a detector 15 to perform the prescribed image pick-up in the territory in the south-north width. The reflecting mirror 11-2 inclined at theta deg. in the south direction for the mirror 11-1, then picks up an image by scanning the south territory adjacent to the scanned zone of the object in the east-west direction. Similarly the different territory adjacent to the object is scanned in order by each reflecting mirror 11-3...11-n and the image pick-up is completed by performing the scanning of the whole body of the object. And when the number of reflecting mirrors and inclination are adequately set according to the number of picture elements of the detector and the angle of visibility and resolution for the object, the two dimensional scanning of the whole objects can be performed by the rotation around the center axis of the mirror 11.