| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a length control device of an optical path capable of changing the lengths of a plurality of light paths, which are constituted using a mirror made possible to miniaturize, an optical fiber, etc. at once by the movement of a movable part. <P>SOLUTION: In the length control device of the optical path, at least four reciprocating optical paths 5 are provided between a movable part 1 and a fixed part 3. The movable part 1 is movably provided to the fixed part so that all of the lengths of the optical paths 5 are changed at the same time. By this constitution, for example, the movement of the movable part 1 is controlled to change the delay time of the light passing through the optical paths 5 reaching a predetermined position. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
