| 摘要 |
<p>The device includes a filter member (30) which is located to intersect an optical path along which optical energy having a high density propagates. The filter member (30) is constantly rotated to sequentially shift a part thereof on which the optical energy is incident, The axis of rotation (32) of the filter member (30) is movable perpendicularly thereto within a predetermined range. The filter member transmits a light component having a particular wavelength and reflectors at least one of the light components in the other wavelength range. </p> |
