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CCD based low-coherence interferometry using balanced detection

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Abstract

The detection of reflective interfaces in a multilayer object using Coherence Radar [1] is limited by the dynamic range of the analogue CCD camera and the analogue to digital (A/D) converter or frame grabber [2]. In this paper, we describe a new differential detection method for Coherence Radar which significantly reduces the required dynamic range of the A/D converter.

© 1998 IEEE

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