Revision and calibration of system transfer function for large-aperture interferometer

xu jian-cheng; xu qiao; peng han-sheng

Volume 20 Issue 08

Aug. 2008

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Zhou Quanfeng, Lu Yuanrong, Zhu Kun, et al. Tuning and measurement of inter-electrode voltage for four-rod radio frequency quadrupole accelerator[J]. High Power Laser and Particle Beams, 2013, 25: 124-128.

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xu jian-cheng, xu qiao, peng han-sheng. Revision and calibration of system transfer function for large-aperture interferometer[J]. High Power Laser and Particle Beams, 2008, 20.

Citation:

xu jian-cheng, xu qiao, peng han-sheng. Revision and calibration of system transfer function for large-aperture interferometer[J]. High Power Laser and Particle Beams, 2008, 20.

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Revision and calibration of system transfer function for large-aperture interferometer

1.
Chengdu Fine Optical Engineering Research Center,P.O.Box 450,Chengdu 610041,China;
2.
Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China

Publish Date: 2008-08-15

Abstract

Abstract

The large-aperture interferometer can not be regarded as shift-invariant linear imaging systems since for it has different forms of point-spread function at different field positions. It is necessary to revise the calibration of system transfer function by the method of subaperture stitching. The large field is divided into many isoplanatic regions and the transfer function of each isoplanatic region is measured by standard phase step. Then the revised system transfer function can be expressed as the weight average of the transfer function of each isoplanatic region, whose weight depends on power spectrum of the actual test surface at the corresponding region. The experiment shows that the difference between the revised system transfer function and the zero-field transfer function is large
- interferometry,
- power spectrum density,
- system transfer function,
- large-aperture interferometer,
- standard phase-step

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