Position adjustment device for reflector, detection method and detection device

摘要

laser light is beamed substantially perpendicular to a screen member, while temporarily fixing the laser transmitter at three of more points at regular intervals in a rotary direction about the rotary axis TA. The rotary axis TA is defined by a straight line that passes through the light emitting opening of the laser transmitter and is substantially perpendicular to the screen member. The beamed direction of the laser light beamed from a laser transmitter is adjusted by a transmitter position adjustment portion so as to make the laser light hit the center of the three or more points on the screen member.