PROBLEM TO BE SOLVED: To provide a technology for improving measuring accuracy of a magnetic field by controlling atom density in a cell in a magnetic field measuring device for measuring the magnetic field while the plurality of cells are arranged adjacently.SOLUTION: A film in which atoms excited by circularly polarized light are mixed is formed on an inner wall of the magnetic field measuring device. A magnetic field detection unit detects the magnetic field in each cell by applying a fixed magnetic field to a sensor array where a plurality of cells each containing an atom group comprising the atoms are arranged. A first processing for radiating induction light from an induction light radiation unit is performed so that the magnetic field detection result of each cell becomes a target value by changing a light volume of the induction light for photoinduced-desorbing the atoms from the film of each cell. The magnetic field measuring device performs a second processing for detecting the magnetic field emitted by the sample with the magnetic field detection unit by radiating induction light to each cell from the induction light radiation unit with a light volume for allowing the magnetic field detection result of each cell to become a target value.COPYRIGHT: (C)2012,JPO&INPIT【課題】複数のセルを並べて磁場を計測する磁場計測装置において、セル内の原子密度を制御して磁場の測定精度を向上させる技術を提供する。【解決手段】磁場計測装置は、円偏光により励起される原子が混入されている膜が内壁に形成され、当該原子からなる原子群が含まれたセルを複数配列したセンサーアレイに対し、一定の磁場を印加して各セルにおける磁場を磁場検出部で検出し、各セルの膜から前記原子を光誘起脱離させる誘起光の光量を変化させて各セルの磁場の検出結果が目標値となるように誘起光照射部から誘起光を照射する第1の処理を行う。また、磁場計測装置は、各セルの磁場の検出結果が目標値となる光量で誘起光照射部から各セルに誘起光を照射し、検体から発する磁場を磁場検出部で検出する第2の処理を行う。【選択図】図1
