The identification of color difference of polychromatic light by silicon color sensor with double PN junction

Abstract

An investigation on the relation between the spectral distribution of polychromatic light and output signal of silicon color sensor with double PN junction is carried out. It shows that silicon color sensor has considerable capability to discriminate the color difference resulted from the variation in the wavelength corresponding to the peak value of power in the spectral distribution. An experimental set-up is designed for the identification of color difference by the silicon color sensor. The experimental observation confirms the theoretical analysis.