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一、复合式剪切光学器件的应用由于高相干性光源-激光的出现,目前已研制出能用于研究漫射体表面形变的新型干涉仪,它包括全息干涉术、散斑干涉术以及散斑剪切干涉术。这里我们主要讨论散斑剪切干涉术,因为它对于隔振和光源相干性要求比全息术低,比其它散斑技术所获得的条纹质量高。利用散斑剪切干涉术原理,制成了一种干涉仪,我们称之为复合式剪切相机。这种相机容易获得,也就是在普通相机的物镜前装一付复合式剪切光学器件,将此器件分成四个等区域的象限,其标号为(1)～(4),见图1。
First, the application of composite shear optics Due to the emergence of highly coherent light source - laser, has developed a new type of interferometer can be used to study the surface deformation of the diffuser, which includes holographic interferometry, speckle interferometry and scattered Spot shear interference. Here we mainly discuss speckle shear interference because it has lower requirements on vibration isolation and light source coherence than holography and higher streak quality than other speckle techniques. The use of speckle shear interference principle, made of an interferometer, we call it a composite shear camera. This camera is easy to get, that is, in front of the ordinary camera with a pair of composite shear optics, the device is divided into four quadrants of the area, which are numbered (1) ~ (4), see Figure 1.