Wavelength identification method and analyzer

1. An analyzer that analyzes a sample based on optical characteristics of the sample, comprising:

a measuring unit that measures absorbances of two or more wavelength identifying samples having different concentrations and having absorbance characteristics in which there is no extremum in a wavelength band including a wavelength to be identified, the wavelength identifying samples being made of a same material;

a calculator that obtains a gradient of a straight line indicating a relationship between the concentrations and the absorbances of the identifying samples measured by the measuring unit; and

an identifier that identifies an actual wavelength of light to be measured by the measuring unit, based on a degree of coincidence between the gradient of the straight line calculated by the calculator and at least one pre-obtained reference gradient of a straight line indicating a relationship between concentrations and absorbances of reference samples made of the same material as the wavelength identifying samples for at least one wavelength,

wherein the same material has an absorbance characteristic with a sufficiently large derivative in the wavelength band so as to accurately identify the actual wavelength of light to within 1 nm or less.

2. The analyzer according to claim 1 , further comprising an output unit that outputs the actual wavelength of the light to be measured by the measuring unit, which has been identified by the identifier.

3. The analyzer according to claim 1 , wherein the material of the identifying samples and the reference samples is pigment solution.

4. A wavelength identification method of identifying an actual wavelength of light to be measured by an optical measuring system, the method comprising:

measuring absorbances of two or more wavelength identifying samples having different concentrations and having absorbance characteristics in which there is no extremum in a wavelength band including a wavelength to be identified, the wavelength identifying samples being made of a same material;

calculating a gradient of a straight line indicating a relationship between the concentrations and the absorbances of the identifying samples measured in the measuring; and

identifying the actual wavelength of the light to be measured by the optical measuring system, based on a degree of coincidence between the gradient of the straight line calculated in the calculating and at least one pre-obtained reference gradient of a straight line indicating a relationship between concentrations and absorbances of reference samples made of the same material as the wavelength identifying samples for at least one wavelength,

wherein the same material has an absorbance characteristic with a sufficiently large derivative in the wavelength band so as to accurately identify the actual wavelength of light to within 1 nm or less.

5. The wavelength identification method according to claim 4 , further comprising outputting the actual wavelength of the light to be measured by the optical measuring system, which has been identified in the identifying.

6. The wavelength identification method according to claim 4 , wherein the material of the identifying samples and the reference samples is pigment solution.