| 摘要 |
<p>PROBLEM TO BE SOLVED: To measure a refractive index of a test object with high accuracy.SOLUTION: A refractive index measurement method measures a refractive index of a test object 80, by dividing light from a light source 10 into test light and reference light and measuring interference light obtained by the interference between the test light and the reference light that have been transmitted through the test object. The refractive index measurement method comprises: disposing the test object in a medium 70 having a group refractive index equal to a group refractive index of the test object 80 in a specific wavelength to measure interference light; determining the specific wavelength on the basis of wavelength dependence of the phase difference between the test light and the reference light; and calculating the group refractive index of the medium 70 corresponding to the specific wavelength as the group refractive index of the test object 80 corresponding to the specific wavelength.</p> |
