26 June 2017 Modeling on Bessel beam guide star beacon for wavefront sensing
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Abstract
Bessel beam has the advantages of reducing scattering artefacts and increasing the quality of the image and penetration. This paper proposed to generate a guide star by Bessel beam with vortex phase, and to use the beacon with special spot structure to measure the atmosphere turbulence aberrations. With the matching algorithm of measured characteristic spot in each subaperture, the detection accuracy of Hartmann wavefront sensor can be improved. Based on wave optics theory, the modeling of Bessel beam guide star and wavefront sensing system was built. The laser guide star beacon generated by Bessel beam with vortex phase and beacon echo wave measured by Hartmann sensor were both simulated. Compared with the results measured by echo wave from Gauss beam generated guide star beacon, this novel method can reduce the error of wavefront detection and increase the detection accuracy of Hartmann sensor.
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Quan Sun, Ruiyao Luo, Yi Yang, Wuming Wu, Shaojun Du, Yu Ning, "Modeling on Bessel beam guide star beacon for wavefront sensing", Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301S (26 June 2017); doi: 10.1117/12.2270391; https://doi.org/10.1117/12.2270391
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