| 摘要 |
PURPOSE:To improve the accuracy of the measurement of scattered light by constitution that is comparatively small and inexpensive, by installing detecting elements for detecting only the scattered light from a central portion of a sample at an image formation location of the center of a sample cell by means of a condensing element. CONSTITUTION:The bright light of a luminous diode 1 near the point source of light is condensed by means of a condensing lens 2, and condensation projected to a central portion of a sample cell 5. The effective dimensions of the sample cell 5 are decided to be 4mm wide, 6mm high and 8mm long, but scattered light is not generated from a side-wall of the cell 5 because incident light flux passes without contacting with the side-wall of the sample cell 5. The condensing lenses 3, 4 of a photo- detecting system are arranged in the directions that form the angles of 90 deg. and 35 deg. to incident light, and photo-detectors 6, 7 are installed at the equimultiple image formation locations of a central position of the sample cell 5. If an effective detecting surface of a photo-diode, a photo-detector, is approximate 3mmphi, only scattered light within a limited range of a central portion of sample liquid is detected, thus improving the accuracy of measurement. |
