LIVING BODY LIGHT MEASUREMENT DEVICE AND LIVING BODY LIGHT MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a living body light measurement device capable of suppressing S/N reduction and a cross talk.SOLUTION: A living body light measurement device comprises: one or plural light source parts for radiating light which is modulated with a prescribed modulation frequency to an analyte; one or plural light detection parts for detecting a light signal based on the light radiated from the light source part; a signal acquisition part for multiplying the light signal which is detected on the light detection part by the signal in the prescribed modulation frequency corresponding to each light source part, for acquiring the signal as a signal radiated from each light source part; an analog-digital converter for performing analog-digital conversion to the signal acquired by the signal acquisition part with a prescribed sample frequency; and a calculation part for integrating the signals converted by the analog-digital converters. The sample frequency is an even multiple of all modulation frequencies, and a time integrated by the calculation part is an integral multiple of modulation signal periods which are inverse numbers of the all modulation frequencies.SELECTED DRAWING: Figure 5