Abstract
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.
© 1999 Optical Society of America
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