Optical image measuring apparatus

摘要

To provide an optical image measuring apparatus capable of calculating an intensity of a direct current component composed of background light based on a result obtained by detection of interference light and obtaining a signal intensity of the interference light using the calculated intensity. The apparatus includes: an optical interference system to divide a light beam into signal light and reference light, and the signal light propagating through an object to be measured and the reference light are superimposed to produce interference light; beam splitters for dividing it into three interference light beams; shutters to perform sampling; photo detectors for detecting the sampled interference light beams and converting them into electrical signals; and a signal processing portion for calculating the signal intensity of the interference light and the spatial phase distribution thereof based on the electrical signals.