共查询到20条相似文献,搜索用时 46 毫秒
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StudyoftheThermalDiffusivityofOpticalCoatingbyPhoto-thermalDeformationTechnique¥ZHOUDongping;FANZhengxiu(ShanghaiInstituteofO... 相似文献
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PureDispersiveOpticalBistabilityofFour-levelSysteminaFabry-PerotCavity¥JIYing;LINFucheng(ShanghaiInstituteofOpticsandFineMech... 相似文献
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Analysis of Fabrication Errors and Study of Calibration Method for Multilevel Diffractive Optical Element 总被引:1,自引:0,他引:1
FU Yongqi 《Chinese Journal of Lasers》1998,7(3):229-234
AnalysisofFabricationErorsandStudyofCalibrationMethodforMultilevelDifractiveOpticalElementFUYongqi(ChangchunInstituteofOptics... 相似文献
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CompactOpticalOmegaNetwork¥WANGNing;YINYaoal;QIANJiajun;LIULiren(ShanghaiInstituteofOpticsandFineMechanics,AcademiaSinica,P.O... 相似文献
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StudyonLaserConditioningofOpticalCoatings¥ZHAOQiang;FANZhengxiu;WANGZhijiang(ShanghaiInstituteofOpticsandFineMechanics,Chines... 相似文献
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WANG Wenbo GAO Weijian YIN Jianping WANG Yuzhu 《Chinese Journal of Lasers》1998,7(2):108-114
TheoreticalAnalysisandExperimentalStudyonGenerationofaDarkHolowBeambyaMicron┐sizedHolowOpticalFiberWANGWenbo1,2GAOWeijian2YI... 相似文献
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SpectralStudyofFullereneDopedOpticalGlasses¥MENGZhicong;LINFucheng;MAOSen;ZENGHeping(ShanghaiInstituteofOpticsandFineMechanic... 相似文献
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AnalysisofOpticalEqualizationinWDMSystemSUNJianGUWanyiLIGuoruiXUDaxiong(BeijingUniv.ofPosts&Telecom.,BeijingP.O.Box128,China... 相似文献
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LIU Shutian 《Chinese Journal of Lasers》1995,4(3):275-280
OpticalAssociativeMemoryBasedonDoublePhaseConjugationUsingBi_(12)TiO_(20)PhotorefractiveFiber¥LIUShutian(DepartmentofPhysics,... 相似文献
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A Optical Scheme for Parallelly Realizing the Morphological Erosion of 1-D Gray ImagesAOpticalSchemeforParallellyRealizingthe... 相似文献
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Based on the theory of scalar diffraction, this paper makes research on the process of hologram reconstruction of true color calculation by lensless Fourier transform, and gives its algorithm on the basis of the angular spectrum theory as well as the instances of color image reconstruction under the red, green and blue colors wavelength. In order to eliminate the influence of color difference on the reconstructive image, this paper analyzes the causes of the color difference, and puts forward the method of interpolation reconstruction to the object information in the process of hologram reconstruction, so as to eliminate the color difference. With the advantages of computer generated holographic, the high-quality color hologram by lensless Fourier transform based on the angular spectrum theory has been realized, and the results of corresponding numerical simulation are given. The results show that the method in the paper can effectively eliminate the color difference caused by different wavelength, and the experimental results validate its feasibility. 相似文献
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叙述了全息光学元件在全息激光防护镜、全息夜视镜、全息平视显视仪、全息头盔显示器、尚处于研制阶段的全息瞄准具及制导导弹系统的全息校正片和全息变焦透镜上的应用,说明了全息术在军事上有着广泛的用途(如军事目标模拟识别、军事训练、声波全息和全息雷达等),最后提出在制作全息片中存在的问题。 相似文献
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N.N. Vyukhina I.S. Gibin V.A. Dombrovsky S.A. Dombrovsky B.N. Pankov E.F. Pen A.N. Potapov A.M. Sinyukov P.E. Tverdokhleb V.V. Shelkovnikov 《Optics & Laser Technology》1996,28(4):269-276
Results of studying a holographic memory to write/read digital data pages are presented. The research has been carried out in Novosibirsk, Russia. Great attention was paid to methods of improving recording density and the reliability of data reading, the development of ‘dry’ photopolymers that provide recording of superimposed three-dimensional phase holograms, and the designing of parallel optic input large-scale integration (LSI) for reading and logical processing of data arriving from the holographic memory. 相似文献
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We propose and demonstrate the use of hybrid ternary modulated digital pages for content-addressable holographic data storage. Display of binary data pages with equal number of ZEROs and ONEs by modulating both amplitude and phase of beams using twisted-nematic liquid crystal spatial light modulator, reduces strong de component and produces a more homogeneous spectral distribution at the recording plane. This technique facilitates better recording of all spatial frequencies, thus improving the discrimination capability of a content-addressable memory. Hence we get better results in associative recall in a holographic memory system, with very low number of false hits. An important advantage of the hybrid ternary modulation over pure phase data pages is that it offers a dark state for coding the undesired portion of the SLM while the search argument is small. The unique orientation of quarter wave plate and the analyzer blocks the light transmitted from OFF pixels leading to near total removal of dark signals. This in turn improves the system performance and reduces the number of false hits when the size of the search argument is small. Our experimental results show good discrimination capability and signal-to-noise ratio for a hybrid ternary modulation based content addressable memory. 相似文献
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A method of one-step full-view rainbow holography using conventional holographic plates of 6 °m emulsion as recording materials is described aand experimentally demonstrated. The requirement for the inter-beam angle to avoid cross-talk between two images is discussed. The simplicity and low cost of this method make it particularly suitable for the full-view white light holographic display of moderate-sized objects. 相似文献
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