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Spatially resolved spectral interferometry for determination of subsurface structure

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Abstract

We describe an instrument capable of obtaining two-dimensional images of subsurface structure in real time with no moving parts. The technique is based on spectral interferometry and uses an imaging spectrograph to obtain spatially resolved spectra. A test sample consisting of microscope coverslips and a Ronchi grating was measured, illustrating the system’s depth resolution of 38 μm and transverse resolution of at least 12.7 μm. The technique is readily adaptable to endoscopic delivery as well as three-dimensional real-time image acquisition.

© 1999 Optical Society of America

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