Thickness and Refractive Index Measurements by Full-Field Optical Coherence Microscopy

We present the noble sensing method that can simultaneously measure the physical thickness and the refractive index of a transparent specimen based on full-field optical coherence microscopy. As a sample, a small drop of epoxy was placed on a flat glass plate and high-resolution depth resolved en-face images were taken. With adopting the reference plane from a cross-sectional image, the physical thickness, and the refractive index distribution could be obtained.