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12. 发明授权

US5973784A Common path, interferometric systems and methods using a birefringent material for topographic imaging 失效
标题翻译：通用路径，干涉系统和使用双折射材料进行地形成像的方法
公开(公告)号：US5973784A
公开(公告)日：1999-10-26
申请号：US4560
申请日：1998-01-08
申请人： Piotr Szwaykowski , Michael Greenebaum , Theodore S. Shultz
发明人： Piotr Szwaykowski , Michael Greenebaum , Theodore S. Shultz
IPC分类号： G01B9/02 , G01B11/24
CPC分类号： G01B9/02098 , G01B11/2441 , G01B2290/70
摘要： Common path, two beam interferometers and interferometric measurement systems employ a voltage controlled variable phase retarder enabling rapid stepping of the relative phase between two interfering optical beams by suitable control of the voltage. The beams need not be laterally separated. A compact beam expander with a ball lens is preferably included. The system is compact enough to be contained in a hand-held unit. The system can be used for surface mapping, testing of optical components and detecting the motion of mechanical objects, for example. It is particularly well suited for the mapping of the skin of a live subject. An optimum fringe period and optimum illumination wavelengths for imaging skin are disclosed, enabling the topography of substantial areas of human skin to be rapidly and accurately measured, in times on the order of one-tenth of a second. Methods of conducting interferometric analysis are disclosed, as well.
摘要翻译：公共路径，双光束干涉仪和干涉测量系统采用电压可控相位延迟器，可以通过适当控制电压来快速地步进两个干涉光束之间的相对相位。梁不需要横向分离。优选地包括具有球透镜的小型扩束器。该系统足够紧凑以容纳在手持单元中。该系统可用于例如表面映射，光学部件的测试和检测机械物体的运动。它特别适用于活体对象皮肤的测绘。公开了用于成像皮肤的最佳条纹周期和最佳照明波长，使得能够在十分之一秒的时间内快速且准确地测量人皮肤的实质区域的形貌。还公开了进行干涉测量分析的方法。

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