PROBLEM TO BE SOLVED: To improve measurement accuracy of a magnetic field while making small the device configuration formed when the magnetic field around a test body is measured by disposing a plurality of cells.SOLUTION: A magnetic sensor device comprises: a plurality of cells (161) each of which contains alkali metal atoms, emitting parts (10, 12) that emit incident light with a linear polarization component a first optical mechanism (14) having a first optical system emitting incident light of a luminous flux diameter equivalent to a range in which a plurality of cells are disposed, while maintaining an angle of incident light polarization plane a second optical mechanism (15) having a second optical system emitting into a cell incident light of a luminous flux diameter smaller than that at the time when the light enters, while maintaining an angle of the polarization plane of the light incident from the first optical mechanism a reflection part (162) that reflects incident light passing through each cell toward the same cell and light reception parts (18, 19, 20) that separate the reflected light passing through each cell after being reflected and passing through the second optical mechanism and the first optical mechanism, into a first polarization component and a second polarization component, and outputs light reception information indicating a light reception amount of each component.COPYRIGHT: (C)2013,JPO&INPIT【課題】複数のセルを配列して検体からの磁場を計測する際の装置構成を小型化しつつ、磁場の測定精度を向上させる。【解決手段】磁気センサー装置は、アルカリ金属原子を収容した複数のセル(161)と、直線偏光成分を有する入射光を出射する出射部(10,12)と、入射光の偏光面の角度を保持した状態で複数のセルが配置された範囲の大きさに相当する光束径の入射光を出射させる第1光学系を有する第1光学機構(14)と、複数のセルに各々対応して設けられ、第1光学機構から入射した入射光の偏光面の角度を保持した状態で入射時の光束径より小さい光束径の入射光をセルに出射させる第2光学系を有する第2光学機構(15)と、各セルを透過した入射光を当該セルに向けて反射させる反射部(162)と、反射されて各セルを透過して第2光学機構と第1光学機構とを通過した反射光を第1偏光成分と第2偏光成分とに分離し、各成分の受光量を示す受光情報を出力する受光部(18,19,20)とを備える。【選択図】図1
