| 摘要 |
PURPOSE: An optical device is provided to fix an optical device by installing a mounting body having at least three support points for supporting the optical device. CONSTITUTION: An optical device(12) has at least one symmetry axis which is non-rotationally symmetry to an optical axis. A mounting body has at least three bearings(26,28,30) holding the optical device. The bearings are movable against the mounting body and is crossed with each other at a cross point where the symmetry axis is installed. |
