Real-time and two-reference-beam hologram interferometry: effects of emulsion shrinkage

When transmission holograms are recorded on photographic materials, any cha nge in the thickness of the photographic emulsion due to processing can pro duce a change in the spacing of the carrier fringes. We show that the resul ting change in the angle at which the image is reconstructed when the holog ram is illuminated with the original reference beam can give rise to signif icant errors in real-time and two-reference-beam hologram interferometry. ( C) 1999 Elsevier Science Ltd. All rights reserved.