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Design of continuous zoom collimating lens for Shack–Hartmann sensor
Li Hongzhuang,Yang Leqiang,Wang Zhichen,Wang Wenpan,Yao Kainan 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.81 No.1
A method to realize the change of spatial sampling rate of Shack–Hartmann wavefront sensor (SHWS) in telescope wavefront measurement using zoom collimating lens is proposed. First, the Gaussian optical formula is derived, and then, the optical system of the collimating lens is design and manufactured. After assembly and adjustment, the collimating lens is combined with Shack–Hartmann wavefront sensor, and the performance of the SHWS system is tested. The results show that the system achieves a changeable sampling rate from 19 × 19 to 12 × 12. In the process of zooming, the wavefront error of the system is less than λ/30 RMS (λ = 632.8 nm), which achieve high performance of wavefront measurement, and meets the expected function requirements.