METHOD AND APPARATUS FOR DETECTING POSITION

摘要

PURPOSE:To enable positional detection even if the optical axis of laser beam is detached from a light receiving surface, by rotating the strip like laser beam from a laser beam emitting apparatus around the axis in the emitting direction and calculating the intersecting point of a plurality of straight lines on the light receiving surface. CONSTITUTION:Strip like laser beam 2' is emitted to the light receiving surface 4 of a light receiving apparatus 3 from a laser beam emitting apparatus 1' and rotated around the axis in the emitting direction to read at least two straight lines in the straight lines of the strip like laser beam 2' appearing on the light receiving surface 4. Then, the intersecting point of a plurality of read straight lines is calculated. The relative position of the light receiving apparatus to the optical axis position of the strip like laser beam 2' emitted from the laser beam emitting apparatus 1' is detected by the calculated intersecting point.