OPTICAL REFRACTOMETRY MEASURING METHOD AND DEVICE

摘要

It is an object to provide an optical refractometry measuring method and an optical refractometry measuring device for making it possible to obtain high precision regardless of a measuring distance. The optical refractometry measuring method and the optical refractometry measuring device, which measures a rear scattering light intensity distribution of a measuring subject in a light propagating direction by using an optical frequency domain refractometry method (OFDR), is characterized in that a coherence monitor is prepared to monitor a coherence characteristic of a frequency sweeping light source (1) and a measured result in a measuring unit (11) is corrected in accordance with the monitored result.