| 摘要 |
PURPOSE:To enable detection of very weak light using a multi-wavelength detector which performs a multi-wavelength simultaneous analysis of very weak light handily. CONSTITUTION:A condensing optical system 3 makes light from a magnified image Sb incident on a collimation lens 4 as spot-like light source and the light from the magnified image Sb to a parallel light beam with a high parallelism to be incident on a transmission type diffraction grating 5. This assures sufficient resolutions. The lens 4 can be brought close to a condenser lens 6 as far as the diffraction grating 5 can be inserted, which enables realization of a smaller size of the apparatus. Moreover, the lenses 4 and 6 employ those bright with a small F number so as to make the whole of the optical system bright sufficiently facilitating the detection of very weak light. In addition, the light from the magnified image Sb analyzed with the diffraction grating 5 is detected with a one-dimensional detector or a two-dimensional detector 7 with such a high sensitivity as to allow a multi-wavelength simultaneous detection thereby accomplishing a multi-wavelength simultaneous analysis on very weak light. |
