PROBLEM TO BE SOLVED: To provide a measuring device, a measuring method, and a measuring program that can eliminate noise.SOLUTION: A light emitting unit 16 emits irradiation light 22 to a region 50. The light receiving unit 18 detects scattering light 24 from the region 50 corresponding to the irradiation light 22. A control unit 12 causes first irradiation light of first intensity and second irradiation light of second intensity lower than the first intensity to be emitted from the light emitting unit 16. The control unit 12 detects a predetermined signal on the basis of first scattering light detected by the light receiving unit 18 corresponding to the first irradiation light and second scattering light detected by the light receiving unit 18 corresponding to the second irradiation light.SELECTED DRAWING: Figure 1【課題】ノイズを除去できる測定装置、測定方法及び測定プログラムを提供する。【解決手段】発光部１６は、部位５０に対する照射光２２を射出する。受光部１８は、照射光２２に応じた、部位５０からの散乱光２４を検出する。制御部１２は、第１の強度の第１照射光と、第１の強度よりも低い第２の強度の第２照射光とを発光部１６から射出させる。制御部１２は、第１照射光に応じて受光部１８で検出される第１散乱光と、第２照射光に応じて受光部１８で検出される第２散乱光とに基づいて所定の信号を検出する。【選択図】図１
