Quantitative Measurements using Dual Hologram Interferometry

摘要

The report describes dual hologram interferometry, a new electro-optic technique used to calculate density distributuions directly from measureable changes in index of refraction. This type of holographic interferometry stores two scenes recorded at different times in separate holograms. One hologram contains data depicting the subject in a reference or undisturbed state while the other hologram describes the same subject in a test or disturbed condition. Desired interference patterns are obtained by superimposing the two separate scenes which are simultaneously reconstructed from each hologram. In this project, dual hologram interferometry is used to quantitatively describe free convection from a uniformly heated right circular cylinder. (Author)