Patent ID: 8525982
Filing Date: 2013-09-03
Classification: G01M,G01N

Abstract:
1. A refractive index distribution measuring method comprising the steps of: measuring a transmitted wavefront of an object by arranging the object in a medium having a refractive index different from that of the object, and by introducing reference light into the object; and calculating a refractive index distribution of the object by using a measurement result of the transmitted wavefront, wherein in a plurality of orientations of the object in the medium which are different from each other, the measuring step measures a first transmitted wavefront in a first medium having a first refractive index and a second transmitted wavefront in a second medium having a second refractive index different from the first refractive index; and wherein the calculating step obtains a refractive index distribution projected value of the object in each of the plurality of orientations by removing a shape component of the object utilizing measurement results of the first transmitted wavefront and the second transmitted wavefront and each transmitted wavefront of a reference object that has the same shape as that of the object and a specific refractive index distribution and is located in one of the first medium and the second medium with the same orientation as that of the object, and the calculating step calculates a three-dimensional refractive index distribution of the object based on a plurality of refractive index distribution projected values corresponding to the plurality of orientations.