Patent ID: 6903870

Claim:
A telescopic apparatus comprising: a reflector; a yoke portion that supports this reflector by using two supports, and rotates around an azimuth axis; a base that supports this yoke portion; a link-mechanism base supported on the bottom within the yoke portion; a parallel link mechanism provided within this link-mechanism base; a link member that is provided within the support of the yoke portion, and is connected with the upper part of the yoke portion and with the parallel link mechanism; a first arm secured on the upper part of this link member; a first length-measuring device that measures the displacement between the end of a member extending from the upper part of the yoke portion and the end of the first arm; a second arm secured on the lower part of the link member; and a second length-measuring device that measures the displacement between a member horizontally extending from the parallel link mechanism and the second arm.