title: Effect of emulsion thickness variations on wavefront reconstruction.
abstract: In this paper an approach will be developed for wavefront recording and reconstruction with a photographic plate when emulsion thickness is not uniform. It is shown that in a first approximation an emulsion thickness variation will not affect the wavefront recording. However, thickness variation does affect the hologram image reconstruction. It is found that a first-order thickness variation (wedge-shaped), except for a lateral translation of image coordinates, will not affect the precision of the reconstruction. However, a second-order variation not only affects the precise dimension of the image reconstruction but also causes an astigmatic effect in the hologram image.
authors.forename: A D
authors.initials: AD
authors.lastname: Gara
authors.forename: F T
authors.initials: FT
authors.lastname: Yu