High resolution H1-H2 single beam reflection holography using DuPont photopolymer holographic recording film

We report an experimental study of the use of DuPont photopolymer Holographic Recording Film to record high resolution reflection holograms of an integrated circuit chip with an initial film-to-object separation of 1.5 millimeters. A two-step H1-H2 recording sequence is used to transfer H1 images to the H2 film plane. Because of emulsion shrinkage, the optimum H2 recording wavelength is similar to 10 nm shorter than the H1 recording wavelength. The H2 reflection holograms, which are incoherently illuminated and viewed through a conventional microscope, reconstruct high resolution images with clearly resolved micron sized features.