| 摘要 |
PURPOSE:To eliminate the influence of the turbidity in a colored transparent medium which may causes an error in colorimetric numeral by irradiating the colored transparent medium by a light source within a visible region spectrum range and a light source for an invisible electromagnetic wave, and photodetecting respective transmitted light beams by two kinds of suitable sensors. CONSTITUTION:Two kinds light sources are used; light source A within the range of a visible spectrum for measuring transmitted light of the colored transparent medium 1 containing a turbid material 2 and light source B for, for example, infrared rays which are neither within the wavelength range of the visible spectrum nor transmitted through an opaque solid or colloidal material. The colored transparent medium 1 is irradiated and transmitted light beams 3a and 3b are photodetected by sensors 4a and 4b and their light intensity values are converted into currents or voltages. The quantities of electricity from the two sensors 4a and 4b are led to an arithmetic processing part 5 to extract only information on color. |
