Measurement and Analysis of Compound Amplitude and Phase Holographic Gratings

Abstract

A hologram on which an interference pattern is recorded, appears transparent after exposure, developing and bleaching. However, these types of holographic transparencies are found to have both some periodic variations of optical density and surface relief when measured using microdensitometer and profilometer. We refer to this kind of holographic grating as a compound hologram, i.e. it contains variations in both amplitude and phase.