Patent ID: 8472013
Filing Date: 2013-06-25
Classification: G01M,G01N

Abstract:
1. A refractive index distribution measurement method comprising the steps of: measuring a first transmission wavefront of a test object by introducing reference light to the test object immersed in a first medium having a first refractive index lower than that of the test object by 0.01 or more; measuring a second transmission wavefront of the test object by introducing the reference light to the test object immersed in a second medium having a second refractive index lower than that of the test object by 0.01 or more and different from the first refractive index; calculating a first wavefront aberration, which a difference between the measured first transmission wavefront and a transmission wavefront of a reference object having a specific refractive index distribution when the reference object is located in the first medium; calculating a second wavefront aberration, which is a difference between the measured second transmission wavefront and a transmission wavefront of the reference object when the reference object is located in the second medium; and calculating a refractive index distribution of the test object by removing a shape component of the test object based on the calculated first and second wavefront aberrations.