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Proceedings Paper

New ITF measure method based on fringes
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Paper Abstract

With the unprecedented developments of the intense laser and aerospace projects', the interferometer is widely used in detecting middle frequency indicators of the optical elements, which put forward very high request towards the interferometer system transfer function (ITF). Conventionally, the ITF is measured by comparing the power spectra of known phase objects such as high-quality phase step. However, the fabrication of phase step is complex and high-cost, especially in the measurement of large-aperture interferometer. In this paper, a new fringe method is proposed to measure the ITF without additional objects. The frequency was changed by adjusting the number of fringes, and the normalized transfer function value was measured at different frequencies. The ITF value measured by fringe method was consistent with the traditional phase step method, which confirms the feasibility of proposed method. Moreover, the measurement error caused by defocus was analyzed. The proposed method does not require the preparation of a step artifact, which greatly reduces the test cost, and is of great significance to the ITF measurement of large aperture interferometer.

Paper Details

Date Published: 26 January 2016
PDF: 7 pages
Proc. SPIE 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015, 97960S (26 January 2016); doi: 10.1117/12.2228450
Show Author Affiliations
Qiaoran Fang, Nanjing Univ. of Science and Technology (China)
Shanghai Institute of Optics and Fine Mechanics (China)
Shijie Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Wanrong Gao, Nanjing Univ. of Science and Technology (China)
You Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
HuanHuan Liu, Nanjing Univ. of Science and Technology (China)
Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9796:
Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015
Weimin Bao; Yueguang Lv, Editor(s)

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