PROBLEM TO BE SOLVED: To reduce a lower limit of measurement while improving spatial resolution in the measurement of a magnetic field.SOLUTION: A magnetic field measuring system 1 comprises a cell array, alkali metal atoms, an irradiation unit and a detection unit. The cell array includes a plurality of cells 11 for which the size of a detection plane to pass a magnetic flux therethrough is different when disposed in a magnetic field subjected to measurement, and the plurality of cells 11 are disposed in such a manner that the number of cells 11 per unit area becomes larger than a threshold value. The alkali metal atoms are sealed in each of the plurality of cells 11 and rotate a polarization plane of detection light in accordance with strength of the magnetic field. The irradiation unit irradiates the detection plane of each cell 11 with light. The detection unit detects a rotation angle of the polarization plane of the detection light transmitted through each cell 11.COPYRIGHT: (C)2013,JPO&INPIT【課題】磁場の測定における空間分解能を高めつつ、その測定下限を下げる。【解決手段】磁場測定装置1は、測定対象の磁場の中に配置されたときに磁束が通る検出面の大きさが異なる複数のセル11を有し、単位面積当たりのセル11の数が閾値よりも大きくなるように複数のセル11が配置されるセルアレイと、複数のセル11の各セル11の内部に封入され、磁場の強度に応じて検出光の偏光面を回転させるアルカリ金属原子と、各セル11の検出面に光を照射する照射ユニットと、各セル11を透過した検出光の偏光面の回転角を検出する検出ユニットとを備える。【選択図】図2
