Journal article

Digital holography for quantitative phase-contrast imaging

We present a new application of digital holography for phase- contrast imaging and optical metrology. This holographic imaging technique uses a CCD camera for recording of a digital Fresnel off-axis hologram and a numerical method for hologram reconstruction. The method simultaneously provides an amplitude- contrast image and a quantitative phase-contrast image. An application to surface profilometry is presented and shows excellent agreement with contact- stylus probe measurements. (C) 1999 Optical Society of America.


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