| 摘要 |
To provide an information measuring apparatus which enables stable and easy measurement of concentration information etc. of specific components in a sample even when fluids intervene between its optical device and the sample. An information measuring apparatus including: a light source 1; an ATR device 2 which reflects incident light from the light source 1 onto the sample kept in contact with itself, receives the light returned from the sample, and reflects the received light to the outside; and light detection means 5 which detects the amount of the light reflected from the ATR device 2 to the outside, the ATR device 2 having a first area, part of its surface, where it is in contact with the sample and the light for irradiating the sample is input and a second area adjacent to the first area, the contact angle in the first area being larger than that of the second area, wherein the information in the sample is measured based on the signal obtained through the light detection means 5.
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