PROBLEM TO BE SOLVED: To pursue, to an utmost limit, spatial resolution and time resolution which are not in conventional MEG classified into noninvasive measurement.SOLUTION: Surface emitting semiconductor laser beams which have circular polarized light composed of circular polarized light surface emitting semiconductor laser beams or surface emitting semiconductor laser beams and a quarter wavelength plate are irradiated as lateral optical pumping from an incident window of a gas cell filled with Cs atoms serving as alkali metal steam, and relaxation gas (Ne, Ar, Kr, N2), and a light receiver for receiving optical pumping wavelength from an outgoing window of the gas cell is installed to form a semiconductor laser negative feedback loop. The gas cell is provided with an exciting coil and an output coil to form a magnetic modulator, and elements (a negative feedback surface emitting semiconductor laser, the gas cell, the magnetic modulator and a photo detector) are built in a vibrating magnetic field shield container provided with a brain magnetic field detecting window and having an active canceling function to constitute a noninvasive brain function magnetometer system. Since an evoked magnetic field of 10-13T-10-14T or less can be detected in magnetic field distribution of a primary change associated with neural activity of cerebral nerve cells, diversion to a brain computer can be attained, and its industrial value is extremely high.COPYRIGHT: (C)2012,JPO&INPIT【課題】非侵襲計測に分類される従来のMEGにない空間分解能と時間分解能を極限まで追求できるようにすること。【解決手段】本発明の脳神経細胞の神経活動に伴う一次的変化の磁界分布を計測する外部環境磁場を除去する磁気シールド容器に負帰還半導体レーザからなる光ポンピングCs磁力計を内蔵した非接触型の生体機能診断装置を構成してなる。【効果】以上のとおり、本発明の生体機能診断装置は、脳神経細胞の神経活動に伴う一次的変化の磁界分布を10-13T~10-14T以下の誘発脳磁界の検出ができることから、ブレインコンピュータへの転用も可能となり、その工業的価値は極めて高い【選択図】 図1
