High Speed Photography By Using Two-Dimensional Acoustd-Optic Lattice Deflection And Its Application

Abstract

ABSTRACTThis paper presents the principles and application of high speed photography which is by using technique of acousto -optic deflection to take high speed picture. In the this new method of high speed photography, 10 x 10 lattic pic-ture is recorded on a fixed film (10 x 10mm) by time -serial. This technique can be used to record various transient pro-cess by high speed intcrfcrometry. The exposure time is from 10 -5to 3 x 10 -6sec by using C.M laser as source and is about10 -'sec by using serial pulse laser. The framing frequency is about 105frame / sec. I . INTRODUCTION High speed photography is generally used to record time and space information of transient process. In the mechan-ical type of high speed camera, it is difficult to overcome high production price, mechanical vibration and noise. In orderto obtain clear photographic picture, recording material (film) is must be relatively stationary to optical field in exposureprocess, but it is a couple of contrations, that is high photographic frequency and short exposure time can't be reached atsame time.The technique of acousto -optic deflection is widely used in information optics and optical computer, and used todeflect reference beam to obtain multi -frame holograms in holography'. We have developed a new kind of high speedphotography by two- dimensional acousto -optic lattice deflection, that is to take laser illumination beam or interference