| 摘要 |
PURPOSE:To improve a discrimination property by outputting the intensity of the reflecting light corresponding to the respective angle of incidence of an incident light continuously. CONSTITUTION:A light source 5 constituting the incident means of a light and a lens 6, and a light detector 7 constituting a detecting means are provided. Now, the divergent light emitted from the light source 5 is made incident at the angle (theta1-theta2) having some range on the contact surface of a prism 1 and liquid 2 by the lens 6 and the light reflected by the contact surface is detected by plural light detectors 7 and outputted after data processing by a data process part 9 respectively. The individual light detector of the plural light detectors 7 is provided so as to correspond to the proper angle theta of incidence of an incident light 3 respectively, so the detected output which is from the data processing part 9 is outputted with continuous curves as the reflex rate R(theta) corresponding to a part of respective angle theta of incidence of the incident light 3. |
