Patent ID: 8288705

Claim:
A method for adjusting a position of a reflector, the reflector reflecting radio waves beamed from a radar device, the method comprising: adjusting a direction of a laser light beamed from a light emitting portion of a position adjustment device such as to be beamed in a direction substantially perpendicular to a face of a screen member, the position adjustment device used for adjusting a position of the reflector, the face of the screen member being placed substantially perpendicular to a ground surface; fixing the position adjustment device to a fixing table for the radar device, the reflector positioned to face the position adjustment device, the position adjustment device adjusted in the laser light adjusting step; adjusting a position of the reflector, the position of the reflector being adjusted based on the laser light beamed from the light emitting portion of the position adjustment device fixed to the fixing table; and mounting a mirror to a center of the reflector, the mounting step is performed in the reflector adjusting step, wherein the laser light is beamed to the reflector provided with the mirror, the reflector being adjusted to a position where the laser light reflected from the mirror hits a predetermined area; wherein the laser light adjusting step comprises: arranging a light emitting opening of the light emitting portion that beams the laser light to face the face of the screen member; beaming the laser light from the light emitting portion, the light emitting portion rotating about a rotary axis, the rotary axis set in a direction perpendicular to the face of the screen member; and adjusting the direction of the laser light beamed from the light emitting portion to make the laser light hit a center of three or more projected spots on the face of the screen, the laser light which forms the spots being beamed from three or more different positions by rotating the light emitting portion; the mirror used in the reflector adjusting step has a size substantially equal to a spot diameter of the laser light.