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为了证明一种光学系统的质量,就要求对它的传输波前的形状进行基本的测量。知道了一个光学系统的波前误差和传输特性,就可以计算(在测量波长上)所有常用的质量因素,例如光学传递函数,点扩展函数,Strehl比率等。本文描述了最近研制成功的剪切干涉仪。设计的这种剪切干涉仪是供通用实验室用的,其内容包括仪器特性和工作原理的描述以及测得的精度和理论、精度极限的比较。
In order to prove the quality of an optical system, it is required to make a basic measurement of the shape of its transmission wavefront. Knowing the wavefront error and transmission characteristics of an optical system, you can calculate all commonly used quality factors (at the measurement wavelength), such as the optical transfer function, the point spread function, the Strehl ratio, and so on. This article describes the recently developed shear interferometer. This shear interferometer is designed for use in general laboratories and includes a description of the instrument’s characteristics and working principle as well as a comparison of the measured accuracy with the theory and accuracy limits.