PROBLEM TO BE SOLVED: To reduce quantization noises.SOLUTION: The measurement device includes: an irradiation unit (110) for emitting light a first light receiving unit (121) for receiving light emitted by the irradiation unit a second light receiving unit (122) for receiving scattered light generated in a manner that light is scattered by a scattering body (200) a control unit (140) for outputting a digital control signal (Kc) on the basis of a light receiving signal (Km) of the first light receiving unit and target light amount information (Kt) a conversion unit (150) for converting a digital control signal into an analog control signal (Vo) and driving the irradiation unit (115) and a normalization unit (160) for generating a normalized light amount signal (Ks) on the basis of the light receiving signal of the first light receiving unit, a light receiving signal (Kk) of the second light receiving unit, and the target light amount information.SELECTED DRAWING: Figure 1【課題】量子化ノイズを低減する。【解決手段】計測装置は、光を照射する照射部(110)と、照射部が照射した光を受光する第1受光部(121)と、光が散乱体(200)によって散乱された散乱光を受光する第2受光部(122)と、第1受光部の受光信号(Km)及び目標光量情報(Kt)に基づいて、デジタル制御信号(Kc)を出力する制御部(140)と、デジタル制御信号をアナログ制御信号(Vo)に変換し、照射部を駆動する駆動部(115)に出力する変換部(150)と、第1受光部の受光信号、第2受光部の受光信号(Kk)、及び目標光量情報に基づいて、規格化光量信号(Ks)を生成する規格化部(160)とを備える。【選択図】図1
