Patent ID: 6124936
Filing Date: 2000-09-26
Classification: G01J

Abstract:
A color discrimination system, comprising:light reception means for receiving light reflected from a measurement target or light penetrating the measurement target for each of a plurality of light wavelengths;selecting means for determining a sum total of light reception quantities of the wavelengths and ratios of the light reception quantities of the wavelengths to the sum total, for selecting between a first operation mode using maximum and minimum values of only the ratios of the light reception quantities of the wavelengths to the sum total for a detection object as reference values and a second operation mode using maximum and minimum values of the ratios and the sum total of the light reception quantities of the wavelengths for the detection object as reference values, and for setting the reference values in accordance with the selected operation mode; andmeans for discriminating color of the measurement target and color of the detection object from each other based on the selected one of the first and second operation modes.