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INTRODUCTION Liquid crystal light valves (LCLV) are devices whose function is to convert an input image pos-sessing specific wavelength, intensity and coher-ence to an output image in which some or all of these parameters are varied (Efron et al., 1985). Therefore, they can be used as image amplifiers for large screen projection display, image wavelength converters and incoherent-to-coherent image converters for optical data processing and correlation. The appli-cation potentialities ar… 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｉｎｕｌｔｒａｖｉｏｌｅｔ (ＵＶ)ｉｍ ａｇｉｎｇｔｅｃｈｎｏｌｏｇｙｃａｎｂｅｄｕｅｔｏｉｔｓｖａｒｉｏｕｓｐｏｓｓｉ ｂｌｅａｐｐｌｉｃａｔｉｏｎｓｉｎｔｈｅｆｉｅｌｄｓｏｆＵＶａｓｔｒｏｎｏｍ 相似文献
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MBE growth of ZnSxSe1-x thin films on ITO coated glass substrates were carried out using ZnS and Se sources with the substrate temperature ranging from 270℃ to 330℃. The XRD θ/2θ spectra resulted from these films indicated that the as-grown polycrystalline ZnSxSe1-x thin films had a preferred orientation along the (111) planes. The evaluated crystal sizes as deduced from the FWHM of the XRD layer peaks showed strong growth temperature dependence, with the optimized temperature being about 290℃. Both AFM and TEM measurements of these thin films also indicated a similar growth temperature dependence. High quality ZnSxSe1-x thin film grown at the optimized temperature had the smoothest surface with lowest RMS value of 1.2 nm and TEM cross-sectional micrograph showing a well defined columnar structure. 相似文献
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The structural characteristics and optical and electrical properties of molecular-beam-epitaxy (MBE) grown ZnS0.8Se0.2 thin films on indium-tin-oxide (ITO) glass substrates were investigated in this work. The X-ray diffraction (XRD)results indicated that high quality polycrystalline ZnS0.8Se0.2 thin film grown at the optimized temperature had a preferred orientation along the (111) planes. The transmission electron microscopy (TEM) cross-sectional micrograph of the sample showed a well defined columnar structure with lateral crystal dimension in the order ofa few hundred angstroms. Ultraviolet (UV) photoresponsivity as high as 0.01 A/W had been demonstrated and for wavelengths longer than 450 nm, the response was down from the peak response by more than 3 orders of magnitude. The thin ZnS0.8Se0.2 photosensor layer, with a wide energy gap and anisotropic electrical property, makes a transmission UV liquid crystal light valve ( LCLV) with high resolution feasible. 相似文献
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