| 摘要 |
The invention discloses a low stray light polychromator comprising an optical housing, an entrance slit, a dispersion system and an array detector. The dispersion element of the dispersion system is a grating. A photosurface of the array detector is obliquely intersected with a principal section of the grating. In the invention, by changing the relative operation of optical elements in the polychromator, the stray light generated by the unexpected reflection on the photosurface of the array detector is exactly reflected out from the expected optical path. In addition, on the inner wall of the optical housing, small diaphragms for extinction are disposed in a plane in which reflection faculaee are projected, thus stray light will be reduced greatly. |
