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Compound diffractive telescope system:design,stray light analysis,and optical test

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Chinese Physics B 2010年第1期19卷 234-240页

作者：岳巾英刘华卢振武许文斌张虎张红鑫刘英 Opto-electonics Technology Center Changchun Institute of OpticsFine Mechanics and Physics Graduate School of the Chinese Academy of Sciences

The compound diffractive telescope is a novel space optical system which combines the structure of compound eyes with diffractive optics and so it has a lighter weight, a wider field of view （FOV）, a lower cost as well as looser fabrication tolerance. In this paper, the design of a compound diffractive telescope composed of one primary lens and twenty-one eyepieces is introduced. Then the influence of diffraction orders on the performance of the system is analysed. A modified phase function model of diffractive optics is proposed to analyse the modulation transfer function （MTF） curves for 0° FOV, which provides a more accurate prediction of the performance of the system. In addition, an optimized mechanism is also proposed to suppress stray light. The star image and resolution tests show that the system can achieve diffraction limit imaging within ±2° of FOV and 4-4 mm of eccentricity. Finally, a series of pictures of an object are taken from different channels, and the splicing of pictures from adjacent FOVs is demonstrated. In summary, the designed system has been proved to have great potential applications.

关键词： lens system design compound eyes structure diffractive lens stray light

Optical Design and stray light Analysis of the Space Infrared Optical System

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Journal of Harbin Institute of Technology(New Series) 2017年第1期24卷 32-36页

作者： Yuchen Zhao Yanjun Xu Changzheng Chen Fan Zhang Jianyue Ren Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China

This article describes a novel configuration design for a re-imaging off-axis catadioptric space infrared optical system,and in order to satisfy the signal noise ratio requirements of the system,the stray light of the system is necessary to analyze and restrain. The optical system with a focal length of 1 200 mm,an entrance pupil diameter of 600 mm,an F-number of 2,a field of view of 3°× 0. 15°,a working wave band of 8 μm-10 μm,and the image quality of the optical system almost approach to diffraction limits in all field of *** the mathematical models of stray light are built,and the suppressive structure is established to eliminate the effect of stray light. Finally,TraceP ro is used to analyze and simulate stray light with and without the suppressive structure,and also get the results of the PST curves. The results indicate that appropriate optical system and suppressive structure can highly reduce the stray light of the space infrared optical system.

关键词： space infrared optical system off-axis optical system stray light Point Source Transmission(PST)

Near-field holography enhanced with antireflection coatings--an improved method for fabricating diffraction gratings

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Chinese Optics Letters 2016年第9期14卷 1-5页

作者：李媛芳陈火耀 Stefanie Kroker Thomas K?sebier 刘正坤邱克强刘颖 Ernst-Bernhard Kley 徐向东洪义麟付绍军 National Synchrotron Radiation Laboratory University of Science and Technology of China Institut für Angewandte Physik Friedrich-Schiller-Universit?t Jena Technische Universit?t Braunschweig Laboratory for Emerging Nanometrology Physikalisch-Technische Bundesanstalt

Near-field holography（NFH）, with its virtues of precise critical dimensions and high throughput, has a great potential for the realization of soft x-ray diffraction gratings. We show that NFH with reflections reduced by the integration of antireflective coatings（ARCs） simplifies the NFH process relative to that of setups using refractive index liquids. Based on the proposed NFH with ARCs, gold-coated laminar gratings were fabricated using NFH and subsequent ion beam etching. The efficiency angular spectrum shows that the stray light of the gratings is reduced one level of magnitude by the suppression of interface reflections during NFH.

关键词： Antireflection coatings Coatings Gold coatings Holography Ion beams Refractive index Spectrum analysis stray light X ray diffraction

Study on validation method of visible imagery spatial resolution of imager on geostationary platform

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Chinese Optics Letters 2006年第7期4卷 389-392页

作者：郭强 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration

Based on the analysis for the main elements of the total modulation transfer function （MTF） of imager on geostationary platform, the precise evaluation for its low spatial frequency spectrum has been achieved. Meanwhile, it is pointed out that the main cause of imagery spatial resolution lower than the designed value is the ＂slight defocus＂ of imager focal plane array （FPA）. The validation method for visible imagery spatial resolution is proposed based on the analysis of defocused optical system model and edge-spread-function （ESF）, the relative error is less than 7% after alleviating stray light effects. This method has been applied in the in-orbit ground testing of FY-2C geostationary meteorological satellite successfully.

关键词： Modulation Optical systems Optical transfer function stray light Weather satellites

Development of infrared spectral radiation measurement system of a non-luminous flame

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Chinese Optics Letters 2005年第9期3卷 549-551页

作者：金钊杨茂华原桂彬戴景民 Department of Automation Measurement and Control Harbin Institute of Technology Harbin 150001 Department of Electronic Science and Technology Harbin Institute of Technology Harbin 150001

The spectral radiation characteristic of a non-luminous flame is analyzed. The apparatus and the calibration procedure based on infrared emission spectrometry for measurements of the flame are introduced. The influence of background radiation and stray light on the measurement results could be reduced and suppressed by the design of thermolator and digital lock-in technique. A blackbody cavity was used as reference emission source to calibrate the system that completed absolute measurement. The spectral mea- surement range is 1-20μm. The least measuring distance and the lowest power detected at the entrance pupil are 550 mm and 10^-9 W/cm^2, respectively. The experimental results show that the measure error is less than 10%.

关键词： Combustion Fuels Optical systems Spectrometry stray light

LO-RAY-LIGH@ Diffraction Gratings in UV-VIS Spectroscopy

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Journal of Chemistry and Chemical Engineering 2013年第12期7卷 1117-1120页

作者： Uwe Oppermann Marion Egelkraut-Holtus Tatsuyoshi Fujiwara Shimadzu Europa GmbI-L Duisburg D-47269 Germany Shimadzu Device Corporation Tokyo 101-8448 Japan

It has been more than half a century since the release of the first Shimadzu UV-VIS （UV-visible） spectrophotometer QB-50 in 1952, and during this time more than 160,000 UV-VIS spectrometers have been produced and installed in a wide variety of different applications. A lot of technical innovations have been implemented to improve the performance and significantly reduce the stray light levels. The latest innovation during development of sophisticated spectrophotometers is based on a new holographic exposure method and optimized etching process which has made it possible to produce both high-efficient and exceptionally low stray light gratings. These LO-RAY-LIGH~ gratings have guaranteed values of stray light at the intermediate position between zero-order and first-order lights. The values are measured by Shimadzu＇s laser stray-light-measuring system. The latest development in the series of UV-VIS spectrophotometers is the UV-2700 which is a true double beam double monochromator system in a compact design for high-precision spectral analysis of a wide range of samples including organic and inorganic compounds, biological samples, optical materials and photovoltaics. The high performance optical system is designed with ＂LO-RAY-LIGH＂ diffraction gratings, featuring highest efficiency and exceptionally low stray light. The spectrophotometer operates in the wavelength range from 185 nm to 900 nm and allows highly sophisticated applications such as direct measurement of high density samples up to 8 absorbance units without dilution.

关键词： LO-RAY-LIGH stray light diffraction grating spectrophotometer single monochromator holographic grating highefficiency double monochromator.