| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spectroscopic device capable of continuously changing a center wavelength with a comparatively simple structure. <P>SOLUTION: In the spectroscopic device which includes first and second filter groups including at least two variable band-pass filters, these filter groups are rotatably attached to a filter support plate so as to intersect with each other at a desired rotation angle in directions different from each other with respect to an optical axis. <P>COPYRIGHT: (C)2012,JPO&INPIT |
