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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.
Dingde Jiang,Zhengzheng Xu,Wenpan Li,Chunping Yao,Zhihan Lv,Tao Li 한국통신학회 2016 Journal of communications and networks Vol.18 No.5
Energy consumption has become a main problem of sus-tainable development in communication networks and how to com-municate with high energy efficiency is a significant topic that re-searchers and network operators commonly concern. In this paper,an energy-efficient multicast algorithm in multi-hop wireless net-works is proposed aiming at new generation wireless communica-tions. Traditional multi-hop wireless network design only consid-ers either network efficiency or minimum energy consumption ofnetworks, but rarely the maximum energy efficiency of networks. Different from previous methods, the paper targets maximizingenergy efficiency of networks. In order to get optimal energy ef-ficiency to build network multicast, our proposed method triesto maximize network throughput and minimize networks’ energyconsumption by exploiting network coding and sleeping scheme. Simulation results show that the proposed algorithm has better en-ergy efficiency and performance improvements compared with ex-isting methods.
Jiang, Dingde,Xu, Zhengzheng,Li, Wenpan,Yao, Chunping,Lv, Zhihan,Li, Tao The Korea Institute of Information and Commucation 2016 Journal of communications and networks Vol.18 No.5
Energy consumption has become a main problem of sustainable development in communication networks and how to communicate with high energy efficiency is a significant topic that researchers and network operators commonly concern. In this paper, an energy-efficient multicast algorithm in multi-hop wireless networks is proposed aiming at new generation wireless communications. Traditional multi-hop wireless network design only considers either network efficiency or minimum energy consumption of networks, but rarely the maximum energy efficiency of networks. Different from previous methods, the paper targets maximizing energy efficiency of networks. In order to get optimal energy efficiency to build network multicast, our proposed method tries to maximize network throughput and minimize networks' energy consumption by exploiting network coding and sleeping scheme. Simulation results show that the proposed algorithm has better energy efficiency and performance improvements compared with existing methods.