ABSORPTIOMETRIC MEASUREMENT DEVICE AND BIOCHEMICAL ANALYSIS DEVICE

To enable the luminous power needed for sample identification by a light receiving unit to be detected.SOLUTION: The present disclosure proposes an absorptiometric measurement device comprising: a plurality of LEDs; a substrate provided with a plurality of LEDs on the same plane; a lens which light emitted from the plurality of LEDs enters directly; a slit for passing transmitted light through that has entered a reaction cell after having passed through the lens and having passed through the reaction cell; and a light reception unit for receiving transmitted light and converting to a current. The plurality of LEDs are arranged, in an effective region on the substrate where light can reach the slit, in increasing order of parameter values that are calculated on the basis of the output, emission area and wavelength half-value overall width of the LEDs, in such a way that the LED that shows the smallest parameter value includes the optical axis that passes through the center of the lens and the center of the slit.SELECTED DRAWING: Figure 2 【課題】受光部において試料同定に必要な光量の検出を可能にする。【解決手段】本開示は、複数のＬＥＤと、複数のＬＥＤを同一平面上に備える基板と、複数のＬＥＤから出射した光が直接入射するレンズと、レンズを通過した光が反応セルに入射し、当該反応セルから透過した透過光を通すスリットと、透過光を受光して電流に変換する受光部と、を備え、光がスリットまで到達可能な基板上の有効領域に、複数のＬＥＤは、ＬＥＤの出力、発光面積、及び波長半値全幅に基づいて算出されるパラメータの値が小さい順に、かつ最小のパラメータの値を示すＬＥＤが前記レンズの中心および前記スリットの中心を通る光軸を含むように、配置されている、吸光光度測定装置を提案する。【選択図】図２