| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of control work by providing a casing, in which an optical transmission system for sending light beams is housed, and an optical system, which is separated from that casing, for recognizing a position on the side of a party, and freely attachably and detachably fixing the optical system while setting it at a prescribed position on the surface of the casing. SOLUTION: Slide parts 24M and 24N of a connection block 24 are slid along with guide grooves 27AG and 27BG formed on an upper surface 21A of a casing 21, the position of the connection block 24 is regulated at linear guide parts 27A and 27B, a connecting face 24A of the connection block 24 is abutted to the upper surface 21A of the casing 21, and a roof prism 29 is positioned on the front face of a large diameter lens 25 in a lens holder 22A. An optical system observing part 23 separates one part of the light beam emitted by the large-aperture lens 25 through the roof prism 29, afterwards, returns it parallelly with the optical axis of a light beam emitted by the large-aperture lens 25 and converges it through an objective lens 26 of a telescope 23A to a CCD: 23B. Thus, even when the light beam from the opposite side can not be received, the direction of light beam emission can be easily controlled. |
