Affiliation:
1. University of Chinese Academy of Sciences
Abstract
The computer-generated hologram (CGH) enables the ultra-high accuracy of surface measurement but causes the wavefront degeneration in the optical system. In this article, we give a high-accuracy analytical simulation of the wavefront degeneration in null test by the elliptical Gaussian model. We propose an analytical expression of instrumental transfer function (ITF) for the CGH null test without knowing the phase distribution of CGH, which gives an efficient instruction to suppress the wavefront degeneration. The ITF of the interferometric null test for a ∅3m aspheric mirror can be optimized from 0 to 0.65 at 0.4 Nyquist frequency.
Funder
Key Research Program of Frontier Science, Chinese Academy of Sciences
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Bureau of International Cooperation, Chinese Academy of Sciences
Subject
Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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