Application of modified sensitivity matrix method in alignment of off-axis telescope

Gu, Zheng; Chang-xiang, 颜昌翔 Yan; Xiao-Bing, 李晓冰 Li; Chun-hui, 胡春晖 Hu; Yang, 王洋 Wang

doi:10.3788/ope.20152309.2595

Cited by 4 publications

(2 citation statements)

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“…While moving the secondary mirror in the direction of 5 degrees of freedom, a numerical relationship between the displacement of secondary mirror and aberration correction results can be established. We adopt second-order sensitivity matrix [16][17] as the fundamental method in this paper to establish this relationship, as shown in Equation 1. In practice, the adjustment amount of secondary mirror is calculated based on sensitivity matrix, and then executed by Hexapod.…”

Section: Telescope Optical Systemmentioning

confidence: 99%

Low Spatio-Temporal Frequency Wavefront Aberration Correction Method Based on a Movable Secondary Mirror

Xiao,

Zhao,

Zhang

et al. 2024

IEEE Photonics J.

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A low frequency wavefront aberration correction method for solar telescopes based on secondary mirror movement is proposed to correct dynamic wavefront aberration during the operation of solar telescope. The correction ability of this method is analyzed and validated by numerical simulation and experiments. Theoretical analysis and numerical simulation both indicate the system processes significant aberration correction ability given the correction frequency of the secondary mirror movement is 10 times higher than aberration frequency. After spatiotemporal frequency division of actual wavefront data from solar telescope, the experiment result proves that the proposed correction method based on secondary mirror movement can effectively reduce the overall RMS of dynamic aberrations with high-frequency portion.

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Section: Telescope Optical Systemmentioning

confidence: 99%

Low Spatio-Temporal Frequency Wavefront Aberration Correction Method Based on a Movable Secondary Mirror

Xiao,

Zhao,

Zhang

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…The telescopic component was an off axis three-mirrors system with non-linearity, so a combination of wavefront interferometry and computer-aided alignment was used for adjusted. According to optical simulation analysis [6] , the image quality and beam compression ratio mainly relied on the adjustment of the primary and secondary mirrors, and ensured the accuracy of the exit position and angle through the mechanism reference primary image aperture and exit aperture. After the adjustment of the telescopic component, the system wavefront measurement results for five fields of view were shown in Figure 4, with a beam compression ratio of 2.…”

Section: Adjustment Of Componentsmentioning

confidence: 99%