| 摘要 |
PURPOSE:To obtain high sensitivity, by using light source for generating beam absorbable in an ultraviolet region as an exciting light source for irradiating detection cell. CONSTITUTION:Beam from a mercury xenon lamp 1 is passed through a spectrometer 4, a chopper 5, a mirror 7, a beam splitter 8 and a slit member 9 to irradiate a cell 2 and incident ultraviolet rays are absorbed. Because heat is generated in the cell 2 by this absorption and refractive index is changed, beam from a monitor laser beam source 10 is diffused. The light from the mercury xenon lamp 1 is removed by a cut filter 2 and a part of monitor laser beam is taken by a pinhole 11 to be detected by a photodiode 13. By this method, high sensitivity is obtained. |
