Abstract
A method of increasing the amplitude range of time averaged holography by a factor of between 5 and 50 is described. This technique uses the principle of reference beam phase modulation to freeze any chosen vibrational amplitude with respect to the hologram, resulting in a bright up effect on this fringe. By multiplexing the hologram at various degrees of phase modulation a series of bright amplitude contours are generated on the holographic image, enabling large vibrational amplitudes to be observed. The integrated exposure time of the multiplex holograms is equal to that of time averaged holography since phase modulation, as opposed to amplitude modulation, permits the full utilization of the available light.
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