Measurement device, measurement method, program and recording medium

A measurement method for measuring a biological component included inside a living body, said method comprising:

• emitting, by use of a light source, measurement light having a plurality of wavelengths, each wavelength being different from each other;
• detecting, by use of a detecting device, the measurement light emitted from the inside of the living body;
• controlling, by use of a first polarization control device arrangeable between the light source and the living body and a second polarization control device arrangeable between the living body and the detection device, light transmitted therethrough to have polarization directions associated therewith so as to provide a number of polarization states;
• switching, by use of a measurement control device, in a time division manner combinations involving the wavelengths of the measurement light emitted from the light source and the polarization directions of the measurement light;
• and
• computing, by use of a processing device, an optical rotation degree based on a change in a polarization state of the measurement light emitted from the inside of the living body detected by the detection device and determining a concentration of the biological component based on the computed optical rotation degree,
• in which each combination of the combinations is different from each other and each said combination represents a wavelength of the measurement light emitted from the light source and a polarization direction of the measurement light, and in which the switching of the combinations in the time division manner is performed in a random manner such that a first combination is switched to a second combination which is randomly selected from among the combinations.

A non-transitory recording medium having a program recorded therein, the program causing a computer, capable of communicating with a measuring apparatus having a measurement device which includes a light source to emit measurement light having a plurality of wavelengths, each wavelength being different from each other, and a detection device to detect the measurement light emitted from the inside of the living body, upon execution of the program to:

• switch, in a time division manner, combinations involving the wavelengths of the measurement light emitted from the light source and polarization directions of the measurement light;
• and
• compute an optical rotation degree based on a change in a polarization state of the measurement light emitted from the inside of the living body detected by the detection device and to determine a concentration of the biological component based on the computed optical rotation degree,
• the measurement device having a first polarization control device arrangeable between the light source and the living body and a second polarization control device arrangeable between the living body and the detection device, the first polarization control device and the second polarization control device to control light transmitted therethrough to have polarization directions associated therewith so as to provide a number of polarization states, and
• in which each combination of the combinations is different from each other and each said combination represents a wavelength of the measurement light emitted from the light source and a polarization direction of the measurement light, and in which switching of the combinations in the time division manner is performed in a random manner such that a first combination is switched to a second combination which is randomly selected from among the combinations.