| 摘要 |
PURPOSE:To sample the random polarized radiation light simply and accurately by providing a split optical means having a reflecting polarization plane inclined to the laser radiation light and a split optical means having a reflecting polarization plane faced to this reflecting polarization plane and inclined to the reflected light to make the reflection efficiency of the radiation light constant. CONSTITUTION:The first and second beam splitters 1, 2 have the same characteristics, and the first beam splitter 1 is inserted at the incidence angle theta1 of 45 deg. to the radiation optical path OP or the radiation light LI. The radiation light LI from a laser transmitter 14 is divided into the sample light LS and the radiation light LO by the first beam splitter 1, part of the radiation light LI is reflected by 90 deg. on the reflecting polarization plane 6 of the first beam splitter 1 into the sample light LS, and the remaining portion is transmitted through the reflecting polarization plane 6 into the radiation light LO. Reflecting polarization planes 6, 5 of the first and second beam splitters 1, 2 are arranged at positions rotated by 90 deg., and the sample light LS is reflected on the reflecting polarization plane 5 into the sample light LSO. |
