| 摘要 |
PROBLEM TO BE SOLVED: To provide a total reflection/absorption spectrum measuring device capable of providing a clear image of an analysis point of a sample in visual observation. SOLUTION: A total reflection/absorption Cassegrainian reflecting objective mirror 1 is made up of a primary concave mirror 2 having a hole in the middle, a secondary convex mirror 3 coaxial with the concave mirror 2, and an ATR (attenuated total reflection) prism 4. The concave mirror 2 is in a fixed position, and two kinds of secondary convex mirrors 3, 6 and the prism 4 are installed on a turntable 5 for selection. In ATR measurement, the larger mirror 3 and the prism 4 are selected by turning the turntable 5. The incident angle of light coming into the prism 4 can be increased according to the refraction factor of the prism 4, thus easily satisfying the total reflection condition of the incoming light. In visual observation, the smaller mirror 6 is selected to decrease the incident angle of light coming into a focal position, thereby providing a clear image having very small aberration and little distortion. |
