Direct wavefront sensing from extended objects: a general sensor | |
Li CW(李常伟); Lu YT(陆彦婷); Zhang SJ(张思炯) | |
2021-07 | |
Source Publication | Optical Engineering |
Volume | 60Issue:7Pages:073107-1~073107-17 |
Abstract | Wavefront sensing from an extended object is a challenging task since the phase to be sensed is disturbed by the one generated from the structure of the extended object. Toaddress this problem, a general wavefront sensor is proposed. The configuration of the pro-posed sensor consists of a field lens, a collimating lens, a lenslet array, and a camera. The field lens, the first element of this sensor, ensures that each lenslet collects the same information of the extended object, which is a basis for the reconstruction of the distorted wavefront from the extended object using the proposed sensor. The fundamental strategy of the sensor is converting the scenario of wavefront sensing from an extended object into the traditional one from a point source by eliminating the Fourier spatial spectrum of the extended object in the frequency domain. As a result, the distorted wavefront can be reconstructed using the algorithm of the Shack–Hartmann wavefront sensor. Numerical simulations and experiments both verify the feasibility and accuracy of the proposed sensor for direct wavefront sensing from any types of extended objects. |
Keyword | wavefront sensing extended objects Fourier spatial spectrum |
Subject Area | 天文技术与方法 |
Document Type | 期刊论文 |
Identifier | http://ir.niaot.ac.cn/handle/114a32/1954 |
Collection | 期刊论文 |
Affiliation | 南京天文光学技术研究所 |
Recommended Citation GB/T 7714 | Li CW,Lu YT,Zhang SJ. Direct wavefront sensing from extended objects: a general sensor[J]. Optical Engineering,2021,60(7):073107-1~073107-17. |
APA | Li CW,Lu YT,&Zhang SJ.(2021).Direct wavefront sensing from extended objects: a general sensor.Optical Engineering,60(7),073107-1~073107-17. |
MLA | Li CW,et al."Direct wavefront sensing from extended objects: a general sensor".Optical Engineering 60.7(2021):073107-1~073107-17. |
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