中国科学院机构知识库网格系统: 检索

A new off-axis Gregorian mechanical structure and its alignment method 会议论文 OAI收割
Shanghai, China, 2021-10-28
作者: Fu, Xing; Lei, Yu; Cao, Mingqiang; Yin, Yamei

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收藏 | 浏览/下载：29/0 | 提交时间：2022/03/18

Off-axis Optical System Alignment Zernike Coefficients Sensitivity Matrix

Misalignment Calculation on Off-Axis Telescope System via Fully Connected Neural Network 期刊论文 OAI收割
IEEE Photonics Journal, 2020, 卷号: 12, 期号: 4, 页码: 0600112-1-12
作者: Liu, Zhu; Peng, Oi; Xu, Yangjie; Ren, Ge; Ma, Haotong

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收藏 | 浏览/下载：27/0 | 提交时间：2021/05/11

Off-axis Telescope Misalignment Decentering And Tilt Error Zernike Coefficients Fully Connected Neural Network

The effect analysis of conic coefficient error based on data measured from Talysurf and simulation of Zernike coefficients 会议论文 OAI收割
8th international symposium on advanced optical manufacturing and testing technology (aomatt) - optical test, measurement technology, and equipment, suzhou, peoples r china, 2016-04-26
作者: Jiang, Kai; Liu, Kai; Song, Chong; Qiu, Peng; Wang, Peng

收藏 | 浏览/下载：14/0 | 提交时间：2016/12/02

conic coefficient contourgraph Zernike coefficients optical design

Space optical remote sensor of the CAE thermal control index calculation method (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
作者: Li L.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load and using the finite element method for thermal deformation analysis we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software heat-ray machines under elastic deformation of the system point spread function transfer function (MTF) wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design this method provided a reliable basis for design. (2011) Trans Tech Publications Switzerland.

A new method for comparing Zernike circular polynomials with Zernike annular polynomials in annular pupils (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Jing S.; Dongmei M.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

To compare the difference between Zernike annular polynomial and Zernike circular polynomial an approximate mathematic relationship between Zernike annular polynomial coefficients and SEIDEL coefficients is proposed. A new method is applied in comparing experiment. For real interferometric data of annular wave front the SEIDEL aberration calculated in different ways is removed from the original wave front. Residual astigmatism aberration in annular polynomial way is close to zero but defocus and sphere aberration are 0.002709 -0.00182. The residual SEIDEL using annular polynomial is least. Data used in comparison shows that Zernike annular polynomial is more accurate and meaningful for the decomposition of aberrations and the calculation of Seidel aberrations in annular pupil. The calculation in astigmatism aberration is most accurate and those in defocus and sphere aberration are least accurate when the first 9 terms are used in approximate solving SEIDEL. More coefficients are needed to obtain the real SEIDEL. 2010 IEEE.

Research on automatic Hartmann test of membrane mirror (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang P.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Electrostatic membrane mirror is ultra-lightweight and easy to acquire a large diameter comparing with traditional optical elements so its development and usage is the trend of future large mirrors. In order to research the control method of the static stretching membrane mirror the surface configuration must be tested. However membrane mirror's shape is always changed by variable voltages on the electrodes and the optical properties of membrane materials using in our experiment are poor so it is difficult to test membrane mirror by interferometer and null compensator method. To solve this problem an automatic optical test procedure for membrane mirror is designed based on Hartmann screen method. The optical path includes point light source CCD camera splitter and diffuse transmittance screen. The spots' positions on the diffuse transmittance screen are pictured by CCD camera connected with computer and image segmentation and centroid solving is auto processed. The CCD camera's lens distortion is measured and fixing coefficients are given to eliminate the spots' positions recording error caused by lens distortion. To process the low sampling Hartmann test results Zernike polynomial fitting method is applied to smooth the wave front. So low frequency error of the membrane mirror can be measured then. Errors affecting the test accuracy are also analyzed in this paper. The method proposed in this paper provides a reference for surface shape detection in membrane mirror research. 2010 Copyright SPIE - The International Society for Optical Engineering.

Phase error estimation with broadband white light by Phase Diversity (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Wang Z.; Wang B.; Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

The technique of Phase Diversity (PD) is widely adopted to measure the wavefront error caused by atmosphere turbulence and system error. PD solves the Zernike coefficients of the wavefront by utilizing two images obtained with different defocus value. In this paper we propose a method to restore the image and estimate the wavefront error of an imaging system. And we use present white noises to verify the robustness of the algorithm. We design an experiment system and implement it in our laboratory. The proposed algorithm is validated by computer simulations and experimental results. To use a broadband white object in experimental system a reasonable simplification for the system model is done. Our results show that the robustness against Gaussian white noises of the method is better then the case when the variance value is 0.03. The proposed method can be used as a wavefront sensor and restore the degradative images by photoelectric image system. 2010 SPIE.

Even aberration measurement of lithographic projection system based on optimized phase-shifting marks 期刊论文 OAI收割
microelectron. eng., 2009, 卷号: 86, 期号: 1, 页码: 78, 82
Yuan Qiongyan; 王向朝; Qiu Zicheng; Wang Fan; 马明英

收藏 | 浏览/下载：1101/181 | 提交时间：2009/09/18

Lithography Projection optics Spherical aberration Astigmatism Zernike coefficients

Modeling of aqueous electrolyte solutions based on primitive and first-order mean spherical approximation 期刊论文 OAI收割
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2008, 卷号: 47, 期号: 5, 页码: 1695-1701
作者: Liu, Yan; Li, Zhibao; Mi, Jianguo; Zhong, Chongli

收藏 | 浏览/下载：21/0 | 提交时间：2013/10/08

associating fluid theory ornstein-zernike equation multiple-salt solutions 25 degrees c activity-coefficients osmotic coefficients sodium-chloride magnesium chloride ternary-system single-salt

Methods for integrated simulation of high-precision space optomechanical systems (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
Dong W.; Guang J.; Hong-bo Y.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

Each disciplinary has its own modeling and analysis tools to solve its own specific field problems. In order to achieve integrated simulation of high precision space optical systems and predict optical performance respective to the mechanical and thermal loads data must pass through different analysis tools. Simulation tools used in the thermal structural and optical design process and the relationship among them were first depicted and the integrated simulation methods were described in detail. Zernike polynomial fitting methods and interpolating approaches were also demonstrated. Because of the orthogonality of Zernike polynomials it was not probably used in some situations such as noncircular apertures and discrete data and the coupling of Zernike polynomial coefficients and other methods were also introduced in the paper. The toolkit OMTIA (Optical Mechanical and Thermal Integrated Analyzer) based on the methods was developed which appears as an indispensable tool for engineering practice.