| 摘要 |
<p>PROBLEM TO BE SOLVED: To measure a phase refractive index of a test object with high accuracy.SOLUTION: Light from a light source 10 is divided into test light and reference light, and the test light and reference light having been transmitted through a test object 80 interfere with each other to obtain interference signals. By the use of the interference signals, a phase refractive index of the test object 80 is measured. This refractive index measurement method comprises: obtaining a phase refractive index of a reference test object 80; calculating a first physical quantity that is a function of the phase refractive index of the test object 80; calculating the phase refractive index of the test object 80 using the first physical quantity and the phase refractive index of the reference test object; calculating a second physical quantity that is a function of the calculated phase refractive index of the test object 80; changing the phase refractive index of the reference test object so as to reduce the difference between the first physical quantity and the second physical quantity; and recalculating the phase refractive index of the test object 80 using the changed phase refractive index of the reference test object.</p> |
