| 摘要 |
PURPOSE:To lead many kinds of spectral light to a measuring cell without being affected by external circumstances by connecting the exit position of a spectroscope and a rotating mirror with plural optical fibers. CONSTITUTION:The light from a light source 3 is separated into components having wavelengths lambda1-lambda5 by a spectroscope 2 and they are irradiated to one incidence ends of optical fibers 4a-4e respectively. Beams of light having individual wavelengths are transmitted in optical fibers 4a-4e without being affected by the external atmosphere and are emitted from the other exit ends arranged circularly on a base body 5. A rotating mirror 6 which scans exit ends of optical fibers 4a-4e makes emitted spectral beams of light incident on a beam splitter 8 successively by a fixed mirror 7. Since a photodetector 9 detects directly the light from the beam splitter 8 and a photodetector 10 detects the light transmitted through a measuring cell 11, the difference between outputs from photodetectors 9 and 10 is detected to measure the absorbance of a sample of spectral beams of light having wavelengths lambda1-lambda5. |
