Patent ID: 9476693
Filing Date: 2016-10-25
CPC Classification: G01B,G01N

Claim Text:
1. An optical property measurement apparatus comprising: a first interference optical system configured to split an optical path of light output from a first light source into a first sample optical path and a first reference optical path, scan a predetermined area of a sample with first signal light that passes through the first sample optical path, make the first signal light that has passed through the first sample optical path interfere with first reference light that has passed through the first reference optical path to generate first interference light, and detect the first interference light generated; an optical path length difference controller configured to change an optical path length difference between the first sample optical path and the first reference optical path based on a detection result of the first interference light; a change amount information acquisition unit configured to acquire change amount information indicating an amount of change in the optical path length difference made by the optical path length difference controller; a second interference optical system configured to split an optical path of light output from a second light source into a second sample optical path and a second reference optical path, scan the predetermined area with second signal light that passes through the second sample optical path, make the second signal light that has passed through the second sample optical path interfere with second reference light that has passed through the second reference optical path to generate second interference light, and detect the second interference light generated; a tomographic information acquisition unit configured to acquire tomographic information of the predetermined area based on a detection result of the second interference light; and a refractive index profile obtaining unit configured to obtain a refractive index profile in the predetermined area based on the change amount information acquired by the change amount information acquisition unit and the tomographic information acquired by the tomographic information acquisition unit.