Study of High Speed Interference Photography with Two-Dimensional Acousto-OpticalLattice Deflection

摘要

This paper presents the principle and method of high speed interferencephotography by using the technique of two dimensional acousto-optical lattice deflection. The light beam carrying the interferogram is deflected into a lattice of 10x10 light spots in a time series; the interferogram is recorded on a photographic negative. The Cw laser is the light source; the exposure time can be adjusted between 10(sup -5) to approximately 3x10(sup -6)s; the framing frequency was about 10(sup 5) frames/s. This method was used to record interferograms of transient-state temperature fields in an experimental study of the principle.