摘要
七十年代以来,随着对固体材料冲击波的研究,激光多普勒测速技术有了新进展:广量程和高解析度.最早用于冲击波研究的是位移干涉仪,其局限性是被测速度不能超过200m/sec.为了扩大量程,继而研制出速度干涉仪,从方法上解决了高速度的测量.但速度干涉仪对测速物体表面有磨光的要求,这也限制了它的实际应用.解决的方法是引入广角迈克尔逊干涉仪,以利用物体自然表面的漫射光,这就是对任何反射物的速度干涉仪系统,即VISAR.VISAR是目前激光多普勒测速仪器中最具代表性的一种,本文作了重点介绍.
Since the seventies,laser Doppler technique for measuring velocity has a new development: wide range and high resolution as researching shock wave of solid materials. The displacement interferometer was first used as researching shock wave. But the mea-surd velocity has a practical upper limit of about 200m/sec. To widen range of the interferometer velocity interferometer was later developed and the method of high velocity measurement was found out. However, velocity interferometer has a requirement of polished surface for measurd velocity body. This limits its practical application. Solved method is to introduce Wide-Angle Michelson Interferometer so as to utilize the diffuse light reflected from natural surface of a body: This is Velocity Interferometer System for any reflector,that is VISAR. VISAR is the best typical kind of laser Doppler velocity interferometer at present and is focal point in this paper.
出处
《济南大学学报（社会科学版）》
1995年第1期64-68,共5页
Journal of University of Jinan:Social Science Edition
关键词
激光多普勒
干涉术
漫射
laser Doppler
interferometry
dif fuseness
