实时大口径高灵敏度、高精度莫尔偏折仪的设计和应用

Design and application of real-time holographic large-aperture moire deflector with high sensitivity and high precision

本文介绍了利用Talbot效应制作自成像光栅和泰曼干涉仪实时制作光栅来形成消除系统误差的大口径、高灵敏度、高精度莫尔偏折仪的设计方法和原理;并利用这种偏折仪获得了火箭燃气射流冲击效应场的莫尔偏折图和高超音速激波风洞中非对称流场的多方向莫尔偏折图,为定量计算瞬态流场打下了基础。

This paper presents the principles and design of large-aperture moire deflector, with high sensitivity and high precision, which uses two methods of real-time holography to make grating for eliminating system errors. With this moire deflector some successful results were obtained including moire defiectograms of shock effect field generated by real rocket exhaust plumes and the multi-directional defiectogram of asymmetric flow, field induced in high ultrasonic speed wind tunnel.