摘要光学均匀性是光学材料的重要参数,在运用干涉法对平行平板的光学均匀性进行测量时,由于前后表面平行度好而形成多组干涉条纹。而运用波长移相干涉技术,可以有效地分离各组干涉条纹。在研究波长移相干涉技术的基础上,设计了用波长移相干涉测量透明平板光学均匀性的方法,并运用matlab软件对测量方法进行仿真,利用傅里叶时域变换的方法对仿真干涉图进行信号处理,得到各组相位信息,从而得到光学均匀性。6242
关键词 透明平行平板 波长移相干涉仪 光学均匀性 傅里叶变换
毕业设计说明书(论文)外文摘要
Title measurement of homegeneity of transparent plates with wavelength-tuned phase-shifting interferometer_____
Abstract
Due to the good parallelism between the frontsuface and backsuface of transparent plate, A common problem in measuring transparent plates is spurious reflections, which resulted from backsuface reflections. Thus, it is difficult for us to clarify the regular pattern of this complicated fringe pattern. However, wavlength-tuned phase-shifting interferometry can efficiently defeat the unnecesary reflections.
After grasping technology of wavelength-tuned phase-shifting interfero-
-metry, a method of measuring the homegeneity of transparent plates with this technology has been designed, which than has been simulated in Matlab. After simulation, for getting the information related to surface and phase, process fringe patterns with Fourier transformation. At last, caculate the homegeneity.
Keywords transparent plate wavelength-tuned phase-shifting interfe- rometer homegeneity Fourier transformation
目 录