Near-infrared brain function measuring device and measuring method

摘要

Provided is a multi-channel near-infrared brain function measuring device that can easily level detector noise. In advance, the transmittance of all the optical attenuators is set to 1, and the maximum light amount that can safely irradiate all the light sources is set, and the effective incident light amount of each light source probe i, the minimum effective incident light amount and the maximum effective light amount among them. The incident light quantity is obtained, and the transmittance a i of the light attenuator i on the light source probe side is changed to [minimum effective incident light quantity / effective incident light quantity of the light source probe i] to equalize the effective incident light quantity. The intensity is changed to W = [maximum effective incident light quantity / minimum effective incident efficiency] times, the effective detection efficiency of the detector probe j and the minimum effective detection efficiency thereof are obtained, and the optical attenuator j on the detector probe side is obtained. Is changed to [minimum effective detection efficiency / effective detection efficiency of detector probe j] to control the effective detection efficiency to be equalized, and the detector noise between all the channels k is leveled. Near-infrared brain function measuring device was turned into.