PROBLEM TO BE SOLVED: To provide an instrument for measuring a biogenic substance, using a confocal optical system simplifying the instrument and reducing measurement errors caused by the temperature difference due to the physical condition of a living body and seasonal temperature.SOLUTION: The instrument for measuring a biogenic substance using the confocal optical system includes the confocal optical system and a body 40 enclosing the confocal optical system. The confocal optical system includes a laser light source LD a lens system 23 collimating light from the light source a half mirror 24 transmitting the light collimated by the lens system 23 a lens system 25 focusing the light transmitted through the half mirror toward the living body a lens system 26 condensing the light reflected by the living body and transmitted through the lens system 25 and further reflected by the half mirror a pinhole 27 allowing the light condensed by the lens system 26 to pass through and a PD (photodetector) 28 receiving the light transmitted through the pinhole. The body is provided with a start button 41 for driving the laser, and an emission port 40a allowing the light condensed by the lens system 25 to pass through.COPYRIGHT: (C)2012,JPO&INPIT【課題】装置を簡便化するとともに生体の体調や季節の寒暖による温度の違いに基づく測定誤差を少なくした共焦点光学系を用いた生体成分測定装置実現する。【解決手段】レーザ光源LDと、該光源からの光をコリメートするレンズ系23と、該レンズ系23でコリメートされた光を透過するハーフミラー24と、該ハーフミラーを透過した光を生体に向けて集束するレンズ系25と、前記生体で反射した光が前記レンズ系25を透過して前記ハーフミラーで反射した光を集光するレンズ系26と、該レンズ系26で集光された光を通過させるピンホール27と、該ピンホールを透過した光を受光するPD28を含む共焦点光学系と、これら共焦点光学系を収納する本体40からなり、該本体に前記レーザを駆動するための起動ボタン41と前記レンズ系25で集光された光を通過させる出射口40aを設けた。【選択図】 図1
