PROBLEM TO BE SOLVED: To enable measuring the concentration of molecules to be measured in an excellent S/N ratio.SOLUTION: First laser light with frequency of ω1 and second laser light with frequency of ω2 that satisfy a relationship of ωχ=ω1-ω2(ω1>ω2) to frequency of ωχ in a molecular vibration mode of molecules to be measured are made to converge by a condenser lens into a blood vessel of a living body in which the molecules to be measured are included. A light receiving part receives stimulated Raman scattering light that has been discharged from the molecules to be measured by irradiating the molecules to be measured with the first laser light and the second laser light and subject to Stokes shift, and a concentration calculation part calculates the concentration of the molecules to be measured from the spectrum intensity of the received stimulated Raman scattering light. This technique is applicable to, for example, a molecular concentration measurement device.COPYRIGHT: (C)2014,JPO&INPIT【課題】良好なS/N比で被測定分子の濃度測定を行うことができるようにする。【解決手段】集光レンズが、被測定分子の分子振動モードである振動数ωχに対して、ωχ=ω1-ω2(ω1>ω2)の関係となる振動数ω1の第1のレーザ光と、振動数ω2の第2のレーザ光を、被測定分子が含まれる生体の血管内に集光する。第1のレーザ光と第2のレーザ光が被測定分子に照射されることにより被測定分子が放出した、ストークスシフトした誘導ラマン散乱光を受光部が受光し、受光された誘導ラマン散乱光のスペクトル強度から、濃度算出部が、被測定分子の濃度を算出する。本技術は、例えば、分子濃度測定装置に適用できる。【選択図】図5
