Patent ID: 8520218
Filing Date: 2013-08-27
Classification: G01N

Abstract:
1. A measuring method comprising: a first measuring step of introducing light into a test object and a first medium arranged in a first container and of measuring a sum of an optical path length of the test object and an optical path length of the first medium; a second measuring step of introducing the light into an area that includes the first medium but does not include the test object and of measuring the optical path length of the first medium; a third measuring step of introducing the light into the test object and a second medium arranged in a second container and of measuring a sum of the optical path length of the test object and an optical path length of the second medium, the second medium having a refractive index different from that of the first medium; a fourth measuring step of introducing the light into an area that includes the second medium but does not include the test object and of measuring the optical path length of the second medium; and a calculating step of calculating a refractive index of the test object based on the optical path lengths measured in each measuring step and an actual distance of an optical path for which each optical path length is measured in each measuring step.