Patent ID: 8547544

Claim:
A multichannel photometric measurement apparatus, comprising: a single signal generator for generating an initial signal, the initial signal containing a harmonic component for collectively generating a plurality of modulation signals; a light emitting device including a plurality of light sources that are respectively drivable by each of the plurality of modulation signals having different frequencies; a light detector for detecting a plurality of kinds of light emitted from the light emitting device; and discriminating means for discriminating a detected signal output from the light detector per frequency domain of each of the different frequencies for each of the modulation signals, wherein the signal generator is included in the light emitting device, wherein the light emitting device further includes a plurality of bandpass filters that extract a predetermined different frequency component from the initial signal generated by the signal generator, and wherein the plurality of light sources is each drivable by a modulation signal having the frequency component extracted by a corresponding one of the bandpass filters.