| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical measuring instrument capable of measuring a particle or the like contained in a liquid sample, with high sensitivity. <P>SOLUTION: This measuring instrument is provided with a light source 16, an electric power source 15, a container 11 for holding the liquid sample, diffraction gratings 13a, 13b, 14a, 14b formed in positions contacting with the liquid sample in the container to generate a basic diffraction light pattern by irradiation with light from the light source 16, electrode pairs 13, 14 for constituting at least one part of the diffraction gratings, and capable of impressing negative and positive voltages from the electric power source 15, and a photodetector 18 for detecting diffraction light by the diffraction gratings. A deformed diffraction light pattern different from the basic diffraction light pattern is generated by impressing the voltages to the electrode pairs 13, 14 to change a refractive index distribution of the liquid sample, and information about the liquid sample is measured based on the deformed diffraction light pattern. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
