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	Study on the calculation and application for asphericity of rectangle off-axis aspherics (EI CONFERENCE) 会议论文 OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者: Xuan B.; Song S.-M.; Xie J.-J.; Xie J.-J.; Zhang H. 收藏 \| 浏览/下载：76/0 \| 提交时间：2013/03/25 Asphericity which affects the manufacturing process and the grinding quantity is an important parameter of optical aspherics. In this paper the approximation the least square fitting wavefront aberration sag methods are given for the calculation of optical asphericity. The effects of different definitions of optical asphericity are analysed to optimize the process of manufacture. A sag method is presented to solve the best-fit sphere and asphericity for an off-aixs aspheric mirror with a rectangle aperture of 180mm145mm and polishing quantity and distribution plots are given. The optical manufacturing and testing technology for different choices of best-fit spheres and asphericity are described and analyzed. Therefore proper definition of optical asphericity which is useful to manufacturing is very important for optical fabrication and test. 2009 SPIE.
	A spherical catadioptric telescope system based on Cooke corrector group (EI CONFERENCE) 会议论文 OAI收割 Novel Optical Systems Design and Optimization XII, August 3, 2009 - August 4, 2009, San Diego, CA, United states 作者: Zhang J.; Liu W.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：35/0 \| 提交时间：2013/03/25 To obtain a number of advantages in fabrication testing and alignment many designs in which spherical mirrors replace classical Cassegrain-form aspheric mirrors are present in the literature. However spherical mirrors suffer from substantial spherical aberration and thereby require some form of corrector group. But in this case the question encountered is that of making the basic optical configuration more complex. In this paper a new design based on Cooke corrector group is presented for eliminating spherical aberration which is believed to provide higher performance with less complexity than previous approaches. Besides the cost and fabrication period will be extremely decreased. The telescope system using corrector group here can achieve good optical performance with f# of 10 full field of 0.5 obscuration of 1/3 and MTF (Modulation Transfer Function) of 0.48 corresponding to 50@lp/mm. 2009 Copyright SPIE - The International Society for Optical Engineering.
	Design and tolerance analysis of compensator for high order aspheric surface testing (EI CONFERENCE) 会议论文 OAI收割 2009 International Conference on Optical Instruments and Technology - Optoelectronic Measurement Technology and Systems, October 19, 2009 - October 22, 2009, Shanghai, China 作者: Chen X.; Liu W.; Chen X.; Chen X. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 High accuracy is required in surface testing of 90nm nodal point lithography projecting lens. By comparing various aspheric surface testing methods the structure layout of the compensator is a meniscus positive lens combined with a Plano-convex positive lens. The design results indicate that: primary and high order aberrations are balanced well we adopt Offner null compensator to test the aspheric surface in the point diffraction interferometer at last. In this paper MTF exceeds diffraction limit an Offner compensator is presented on the base of the third order aberration theory to test concave aspheric surface root-mean-square (RMS) of wave front error /167. The F-number of the system can achieve F/1.64. By the analysis of the process of aspheric surface testing with the designed system the optical construction parameters of which is determined by introducing equal-quantities spherical aberration to compensate all orders of aspheric coefficients. The field of view of the system is 0.02 a loosen distribution of the tolerance was presented based on the accuracy of measuring apparatus. 2009 SPIE.
	High-Resolution Image Reconstruction Technique Applied to the Optical Testing of Ground-Based Astronomical Telescopes 会议论文 OAI收割 Conference on Ground-Based and Airborne Instrumentation for Astronomy II, Marseille, FRANCE, 2008-06-23 作者: Jin ZY(金振宇); Lin J(林京); Liu Z(刘忠); Jin ZY(金振宇); Jin ZY(金振宇) 收藏 \| 浏览/下载：20/0 \| 提交时间：2016/04/06 ground-based telescopes testing the aberration averaged short exposure Speckle Interferometric PSF FWHM 2.4m optical telescope GMG Observatory