光学学报, 2006, 26 (4): 557, 网络出版: 2006-05-17
在粗糙表面上用液晶空间光调制器进行振动测量
Vibration Measurements of Rough Surfaces Using an Liquid Crystal Spatial Light Modulator
全息光学 振动测量 时间平均 光寻址液晶空间光调制器 holographic optics vibration measurement time-average optical-address liquid crystal spatial light modu
摘要
为实现在一段时间内连续实时观测振动物体的全息干涉图形,采用覆盖铝箔的喇叭作为振动物体,利用铝箔原有未经特殊处理表面反射的漫反射光成像,并用光寻址液晶空间光调制器(Liquid crystal-sparial light modulator,LC-SLM)作为全息记录载体,来实现振动测量。实验中采用时间平均干涉测量法,得到了不同振动频率下物体的干涉图形。同时在连续改变振动物体的振动频率时,可以清晰地观察到物体振动全息干涉图形的变化过程,即近实时的全息干涉图形。
Abstract
Vibration measurement, observing the holographic interference patterns of vibrating objects in real time in a period of time, is realized with a system, in which a speaker with aluminum foil is used as the vibrating object, imaging is realized with the diffuse reflection light from the raw surface of the aluminum foil, and an optically addressed liquid crystal spatial light modulator is used as the recorder. Time average interference measurement method is used in the experiment, and the vibration interference patterns of the object with different vibrating frequencies is obtained. When the vibrating frequency changes continuously, the changing process of the holographic interference patterns of the object is observed clearly, and the near-real time holographic interference patterns are gained.
叶必卿, 松田清史, 福智昇央, 原勉, 陈军. 在粗糙表面上用液晶空间光调制器进行振动测量[J]. 光学学报, 2006, 26(4): 557. 叶必卿, 松田清史, 福智昇央, 原勉, 陈军. Vibration Measurements of Rough Surfaces Using an Liquid Crystal Spatial Light Modulator[J]. Acta Optica Sinica, 2006, 26(4): 557.