Component Concentration Measuring Device

A component concentration measuring device comprising:

• a light emitting device configured to irradiate a measurement site of a measurement subject with a light beam having a wavelength that is absorbed by a measurement target substance;
• a detector configured to detect a photoacoustic signal generated in the measurement site irradiated with the light beam;
• and
• a resonator that is arranged with the measurement site in between, and is configured to cause the photoacoustic signal to resonate, wherein the resonator includes:
• a first reflector between the light emitting device and the measurement site and has a first reflection surface configured to reflect the photoacoustic signal while allowing the light beam to pass;
• and
• a second reflector between the detector and the measurement site and has a second reflection surface configured to reflect the photoacoustic signal.

A method comprising:

• irradiating, by a light emitting device, a measurement site of a measurement subject with a light beam having a wavelength that is absorbed by a measurement target substance;
• and
• detecting, by a detector, a photoacoustic signal generated in the measurement site irradiated with the light beam;
• clamping, by a resonator, the measurement site, wherein the resonator is configured to cause the photoacoustic signal to resonate, and wherein the resonator includes:
• a first reflector between the light emitting device and the measurement site
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• and has a first reflection surface configured to reflect the photoacoustic signal while allowing the light beam to pass;
• and
• a second reflector between the detector and the measurement site and has a second reflection surface configured to reflect the photoacoustic signal.