| abstract |
To provide a non-invasive living body information measuring apparatus capable of measuring a very weak acoustic signal induced by energy absorption of irradiation light with high accuracy. A non-invasive living body information measuring apparatus includes a light source 8, an irradiation unit 10 that emits light including a specific wavelength component within a range from visible light to infrared region, and lead titanate. An acoustic device that includes a piezoelectric element formed of a piezoelectric single crystal that includes a liquid crystal and is disposed between the subject and the irradiation unit, and detects an acoustic signal generated when a specific substance existing in the subject absorbs light energy. A signal detection unit 11 is provided, the piezoelectric single crystal is transparent to wavelength components in the range from visible light to infrared region, and the light emitted from the irradiation unit is transmitted through the acoustic signal detection unit to the subject. Is irradiated. [Selection] Figure 1 |