二维声光点阵偏转的高速干涉摄影研究

本文介绍了一种利用二维声光点阵偏转技术进行高速干涉摄影的原理和方法。通过二维声光点阵偏转器件,把带有干涉图的光斑(￠6mm～￠8mm)按时间顺序偏转为10×10的光斑点阵,并记录在一张底片上。用连续激光为光源,曝光时间为10~(-5)～3×10~(-6)秒可调,幅频达10~5幅/秒,并用这种方法来记录瞬态温度场的干涉图,进行原理实验研究。

Study of high speed interference photography with two-dimensional acousto-optical lattice deflection

This paper presents the principle and the method of high speed interference photography by using the technique of two-dimensional acousto-optical lattice deflection. The light beam carrying interferogram is deflected into a lattice of 10×10 by time-serial and recorded on a fixed film with two acous bo-optical deflectors. If a CW laser is used as light source, the exposure time can be adjusted from 10-3～3×10-6seo. and the framing frequency is about 105 frames/sec. In the study of prieiple experiment, we have used this method to record the interferograms of transient temperature field.