PURPOSE: To measure real chromaticity, real turbidity and apparent chromaticity by applying operational processing to a chromaticity signal or a signal of light within a wavelength band changing by chromaticity and turbid matter and a turbidity signal or a signal of light within a wavelength band changing by turbid matter.
CONSTITUTION: Both of chromaticity and turbidity are simultaneously measured to obtain a chromaticity signal or a signal (absorbancy signal) of light, for example, within a wavelength band of 390nm receiving attenuation by chromaticity and turbid matter, that is, changing by chromaticity and the turbid matter from a means A. A turbidity signal or a signal (absorbancy) of light, for example, within a wavelength band of 660nm receiving attenuation only by the turbid matter, that is, changing by the turbid matter is obtained from a means B. These two signals are received by an operational processing means C to be subjected to operational processing to obtain real chromaticity CT, real turbidity T and apparent chromaticity CS. At this time, the chromaticity CS is calculated by an operation formula SC=f(CT,T). Further, a table composed of a combination of the respective data of the turbidity T and the chromaticity CT is preliminarily obtained by experiment and the chromaticity CS may be calculated from the data of the corresponding position of the table on the basis of the input signals from the means A, B.
OHARA HISAKI
SUGA AKIHIRO
MINAKI TERUYOSHI
AMAMIYA MASAHITO
