PROBLEM TO BE SOLVED: To suppress reduction of measurement accuracy due to secular change of a human body in measurement of glucose in a human body by an optoacoustic method.SOLUTION: A component density measurement device comprises: a light radiation part 101 for radiating a beam light of wavelength absorbed by a glucose to a measurement part 151； and a detection part 102 for detecting an optoacoustic signal which is generated from the measurement part 151 to which the beam light emitted from the light radiation part 101 is radiated. The component density measurement device further comprises: a thickness measurement part 103 for measuring a thickness of the measurement part 151； and a correction part 104 for correcting the optoacoustic signal detected by the detection part 102 on the basis of the thickness measured by the thickness measurement part 103.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】 光音響法による人体内のグルコースの測定における、人体の経時変化による測定精度の低下を抑制する。【解決手段】グルコースが吸収する波長のビーム光を測定部位１５１に照射する光照射部１０１と、光照射部１０１から出射されたビーム光を照射した測定部位１５１から発生する光音響信号を検出する検出部１０２とを備える。また、測定部位１５１の厚さを測定する厚測定部１０３と、厚測定部１０３が測定した厚さにより検出部１０２が検出した音響信号を補正する補正部１０４とを備える。【選択図】 図１
