LASER PROJECTOR AND RADIOTHERAPY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a laser projector and a radiotherapy system capable of easily supporting correction of positional deviation of a light source of reference light.SOLUTION: A laser projector 21L is arranged so as to face another laser projector across an irradiation center of a radiotherapy device and radiates reference light of visible light for indicating the irradiation center. The laser projector includes: a distance sensor 27L outputting a signal according to a distance between the other laser projector and its own laser projector; a distance measurement section 43L measuring a distance between the distance measurement target position of the other laser projector and its own laser projector according to the output signal of the distance sensor; an angle correction section 42L correcting an irradiation angle of a reference light source and an expectation angle of the distance sensor according to a difference between a target signal and a current light receiving signal so that the reference light passes the irradiation center and the distance sensor outputs a signal according to the distance to the distance measurement target position in expectation of the distance measurement target position; and a display section 28L displaying the distance measured by the distance measurement section.SELECTED DRAWING: Figure 3