Measurement of mid-frequency wavefront for large-aperture optics

Deng Yan; Wang Xiangfeng; Ji Baojian; Shi Qikai

doi:3333

Volume 25 Issue 12

Dec. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(12): 3333-3337

Yang Wei, Hui Haohao, Ma Hongju, et al. KDP crystal antireflective coatings prepared by spin coating method[J]. High Power Laser and Particle Beams, 2013, 25: 3348-3352. doi: 3348

Citation:

Deng Yan, Wang Xiangfeng, Ji Baojian, et al. Measurement of mid-frequency wavefront for large-aperture optics[J]. High Power Laser and Particle Beams, 2013, 25: 3333-3337. doi: 3333

Yang Wei, Hui Haohao, Ma Hongju, et al. KDP crystal antireflective coatings prepared by spin coating method[J]. High Power Laser and Particle Beams, 2013, 25: 3348-3352. doi: 3348

Citation:

Deng Yan, Wang Xiangfeng, Ji Baojian, et al. Measurement of mid-frequency wavefront for large-aperture optics[J]. High Power Laser and Particle Beams, 2013, 25: 3333-3337. doi: 3333

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Measurement of mid-frequency wavefront for large-aperture optics

doi: 3333

1.
Research Center of Laser Fusion,CAEP.P.O.Box 919-988,Mianyang 621900,China

Received Date: 2013-07-22
Rev Recd Date: 2013-08-15
Publish Date: 2013-12-15

Abstract

Abstract

It has become more important for the accurate measurement of the mid-frequency wavefront of the large-aperture optics in high-power laser systems. The root mean square of mid-frequency wavefront is one of the most important specifications. According to the frequency range of mid-frequency wavefront and frequency response characteristics of the measurement devices, the mid-frequency region can be divided into two separate bands, the low-frequency band and the high-frequency band. The wavefront in different band can be measured by interferomter and optical profiler respectively. The full-aperture mid-frequency wavefront over the low-frequency band can be measured by a large-aperture interferometer. Comparing measurement results of the large-aperture interferometer and the small-aperture interferometer, one method named synthesizing averaging sub-aperture wavefronts is proposed to measure the root mean square of the full-aperture wavefront in the same frequency region. Using discrete sampling method, the mid-frequency wavefront of large-aperture optics over the high-frequency band can be measured by optical profiler. It is experimentally shown that the 33 sampling pattern is enough for the measurement of the wavefront with 410 mm410 mm size.
- large-aperture optics,
- mid-frequency wavefront,
- root mean square of wavefront,
- band-pass filtering,
- sub-aperture division,
- discrete sampling

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