PROBLEM TO BE SOLVED: To provide a component concentration measuring apparatus using a photoacoustic method which measures the concentration of a subject component stably by keeping the distance between surfaces of a biological subject constant in order to avoid problems, such as differences in standing waves generated within a biological subject according to the distances between the surfaces of the biological subject and differences in sonic waves generated within the biological subject according to the distances between the surfaces of the biological subject.SOLUTION: The component concentration measuring apparatus 310 comprises a pair of holding means 311a and 311b for sandwiching and holding a biological subject 110 in order to keep the distance between surfaces of the biological subject 110 constant and a distance measuring means 312 for measuring the distance between the holding means 311a and 311b. Because the apparatus comprises a means to keep the distance between the surfaces of the biological subject constant 110, the apparatus can measure the concentration of an object component stably.COPYRIGHT: (C)2009,JPO&INPIT【課題】生体被検部内で発生する定在波は、生体被検部の表面の間隔によって変化する。また、生体被検部内で発生する音波は、生体被検部の表面の間隔で異なる場合がある。そこで、本発明は、光音響法を用いた成分濃度測定装置において、生体被検部の表面の間隔を一定に保つことで、安定した対象成分の濃度を測定可能とすることを目的とする。【解決手段】本発明に係る成分濃度測定装置310は、生体被検部110の表面の間隔を一定に保つために、生体被検部110を挟んで保持する2つの保持手段311a及び311bと、2つの保持手段311a及び311b同士の間隔を測定する間隔測定手段312とを備えることを特徴とする。生体被検部110の表面の間隔を一定に保つための手段を備えるので、安定した対象成分の濃度を測定することができる。【選択図】図9
