| 摘要 |
PURPOSE:To eliminate scattered light due to dust and air bubble and to measure an original scattered light of the material to be inspected, by providing a detector on different places independently of the detector detecting the original scattered light of the material to be inspected. CONSTITUTION:Laser light emitted from a laser light source 1 is entered to a sample cuvette 2 and scattered light from the cuvette 2 is made incident to a light detector 6 through visual field angle determination slit boards 4, 5 and a lens 3 and then photoelectric conversion is executed. On the one hand, an output of a photodetector 7 for monitor provided on a secondary light axis Q in the direction of right angles with respect to a main light axis P of the source 1, is inputted to a comparator 12 and only when this output is smaller than a reference voltage Vref, the output of a A/D converter 11 is taken in a memory of CPU14. Further, an operational processing output of a CPU14 is supplied to a buzzar 17, a recorder 18, a cathode-ray tube 19. Hereby, measured value due to the scattered light other than the signal light from the data obtained within a photometric time can be eliminated. |
