DETECTION OF PHYSIOLOGICALLY ACTIVE MATERIAL

摘要

PURPOSE:To enable objective detection with a small quantiy of sample by determining quantitatively the flocculating state of pulverous particles from the comparison between the diffraction pattern measured by irradiating coherent light to the pulverous particles in a medium liquid and the diffraction pattern of the unflocculated sample. CONSTITUTION:The light beam from a laser light source 1 is irradiated via an aperture 3, etc. to a sample cell part 4 having a sample holding mechanism part 15 and the diffracted light thereof is formed an image as a diffraction pattern onto a conversing plane 6 by a Fourier transform lens 5. The intensity distribution thereof is measured by using a photoelectric tube 7 and the surface of the plane 6 is scanned by a scanning part 8 which is controlled by a scanning control part 10. The intensity distribution pattern is thus measured. The light intensity signal from the tube 7 is further processed by an amplifier filter 11 and is applied as the intensity signal of the diffraction pattern of a control part 12. The information of the position on the plane 6 detected by the tube 7 in the part 8 is applied to the part 12 where the pattern distribution is constituted again and the difference from a reference pattern is subjected to digitalizing processing.