ASYMMETRY IN THE DIFFRACTION SPECTRUM OF A REFLECTION HOLOGRAM GRATING

Reflection holograms were recorded in dichromated gelatin and dichroma ted poly(vinyl alcohol) using Lippmann and symmetric configurations. I n their diffraction spectra; asymmetry has been observed and a series of secondary peaks appeared on only one side of the main peak. A detai led theoretical analysis has been made for both recording geometries. The relationship between the appearance of secondary peaks with the re fractive index was given. The number and the amplitude of the secondar y peaks are related to the thickness of the recording medium as well a s the recording geometry.