| 摘要 |
<p>PURPOSE:To reduce the number of part items of an optical axis adjusting mechanism and an optical axis adjustment checking mechanism. CONSTITUTION:A holder 4 is mounted on a housing 10, and a screw 8 is movably driven into the holder 4 and a collar 9 is movably driven into the holder 4, and the collar 9 and the screw 8 are provided with respective scales 82, 92 for reading the angle of movement of an optical axis. As a result, an optical axis adjusting mechanism for adjusting the optical axis and an optical axis adjustment checking mechanism for ensuring adjustment of the optical axis by reading the angle of movement of the optical axis are integrated to construct a spectral optical axis adjusting mechanism which uses both the screw of the optical axis adjusting mechanism and the rod of the optical axis adjustment checking mechanism, and the spectral optical axis adjusting mechanism and the optical axis adjustment checking mechanism can both be reduced in number of part items.</p> |
