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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 H permeation in molybdenum: temperature dependence and compensation effect from first-principles simulation 期刊论文 JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 2019, 卷号: 56, 页码: 1014-1028 作者:  Yang, Kun Jie;  Liu, Yue-Lin;  Shao, Peng;  Zhang, Xu;  Han, Quan-Fu 收藏  |  浏览/下载：6/0  |  提交时间：2019/12/30 Molybdenum  H diffusion  permeation  temperature and compensation effect  first-principles simulations   Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China Zhang X.; Liu B.; Jia H.-G. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly  the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations  while low dispersion lenses were used in the reimaging system  so the optical system do not need achromatic design for a high image quality. Then  to correct high-order aberrations resulting from large relative aperture  more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here  aspheric is selected for easily manufacture. Finally  the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing  and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).   Bias current compensation method with 41.4% standard deviation reduction to MOSFET transconductance in CMOS circuits 期刊论文 2010, 2010 Mao Xiaojian; Yang Huazhong; Wang Hui 收藏  |  浏览/下载：1/0 Thermal difference analysis and athermalization design of infrared optical system (EI CONFERENCE) 会议论文 Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China Ai X.-Q.; Liu B.; Zhang X.; Jia H. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 When infrared optical system works in a large temperature range  the thermal effect of optical lens and optical tube will produce image plane shift and lead to imaging quality deterioration. In order to eliminate the thermal aberration  the athermalization design principles of infrared optical system were introduced  and some commonly used methods of thermal difference compensation were described. Proceeding from single lens  the thermal difference caused by temperature changing was analyzed  and the relationship between temperature and focus shift was obtained. Considering optical tube thermal expansion  a set of equations to estimate the thermal difference of lens group was given. Finally  an infrared optical imaging system that can work under the temperature range of -40C to 60C was design according to athermal technique  in which a new mechanical passive temperature compensation was proposed. Through simulation  the athermalization design could make imaging plane shift the smallest. The simulation results coincided with the theoretical formula  and the design had reference value in engineering. 2010 Copyright SPIE - The International Society for Optical Engineering.