PROBLEM TO BE SOLVED: To provide a calibration sample with which a light absorption characteristic of unstable hemoglobin with an oxygen saturation of more than 0% and less than 100% is measured for calibration.SOLUTION: The present invention relates to a calibration sample which includes: a first transparent container chamber in which is filled first hemoglobin with a first oxygen saturation in a predetermined concentration and a second transparent container chamber in which is filled second hemoglobin with a second oxygen saturation in the predetermined concentration, and which is configured such that light enters one of the first transparent container chamber and the second transparent container chamber, then passes through the first hemoglobin and the second hemoglobin, and exits therefrom. The first transparent container chamber and the second transparent container chamber are disposed so as to be provided with a plurality of optical paths each having a different ratio between a first optical path length of the first hemoglobin and a second optical path length of the second hemoglobin, with the sum of the first optical path length and the second path length kept constant.SELECTED DRAWING: Figure 1【課題】酸素飽和度が0%超100%未満の不安定なヘモグロビンの吸光特性をキャリブレーションのために測定することができるキャリブレーション用試料等を提供する。【解決手段】キャリブレーション用試料は、第1の酸素飽和度の第1のヘモグロビンを所定の濃度で充填した第1透明容器室と、第2の酸素飽和度の第2のヘモグロビンを前記所定の濃度で充填した第2透明容器室と、を有し、前記第1透明容器室及び前記第2透明容器室のいずれか一方に光が入射し、前記第1のヘモグロビン及び前記第2のヘモグロビンを光が通過して出射するように構成される。前記第1のヘモグロビンの第1光路長さと前記第2のヘモグロビンの第2光路長さの合計を一定に維持しながら、前記第1光路長さと前記第2の光路長さの比が異なる複数の光路を備えるように前記第1透明容器室及び前記第2透明容器室が配置されている。【選択図】図1
