共查询到20条相似文献,搜索用时 15 毫秒
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Yu. N. Markov 《Optics and Spectroscopy》2000,89(5):797-798
Results of calculations are presented that demonstrate the possibility of constructing two-and threecomponent coatings for wide-band interference filters for the medium infrared spectral region with characteristics that could be realized earlier only in four-component interference coatings. 相似文献
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A new method of enhancing the resistance of spectral characteristics of interference coatings to deviations in parameters of layers entering into their composition is presented. The spectral characteristic that can be obtained using this method for the energy transmittance (or reflectance) of an experimentally manufactured coating is maximally close to the characteristic of the synthesized coating. A way to use several samples for monitoring the thickness of layers during the process of their formation with the aim to reduce the deviation of optical layers during manufacturing of interference coatings is presented.
相似文献3.
ICP-AES测定室内装饰装修用水性墙面涂料中可溶性重金属Pb,Cd,Cr 总被引:6,自引:0,他引:6
通过样品中共存元素干扰和酸度效应的研究 ,采用干扰系数法和标准加入法分别校正了光谱重叠干扰和非光谱干扰 ,建立了ICP AES测定水性墙面涂料中可溶性重金属铅、镉和铬的方法。该方法准确 ,检出限低 ,适用于水性墙面涂料的检验工作 相似文献
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Zdeněk Knittl 《Czechoslovak Journal of Physics》1958,8(3):285-294
If the calculation of the squares of the moduli of complex amplitudes is suitably performed in the theory of multiple-beam interference, infinite trigonometric series are obtained, which may be regarded as Fourier expansions of the energy formulae for reflectivity and transmissivity. From this one can directly derive a number of general properties of the interference film of a dielectric, even when metallic coatings are provided at the boundaries.Delivered in the optical section of the 1st Congress of Czechoslovak Physicists, Prague, September 1957. 相似文献
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The response of the transmission spectrum of cascaded long period gratings (LPGs) to the deposition of nanostructured coatings by use of the Langmuir-Blodgett technique is investigated. The phase of the interference fringes within the LPGs' attenuation bands is shown to be highly sensitive to the optical thickness of the coating, for thicknesses of the order of 100 nm. 相似文献
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Nanoporous ZnO/SiO2 bilayer coatings were prepared on the surface of glass substrates via sol-gel dip-coating process. The structural, morphological and optical properties of the coatings were characterized. The refractive indices of ZnO layer and SiO2 layer are 1.34 and 1.21 at 550 nm, respectively. The transmittance and reflectance spectra of the coatings were investigated and the broadband antireflection performance of the bilayer structure was determined over the solar spectrum. The solar transmittances in the range of 300-1200 nm and 1200-2500 nm are increased by 6.5% and 6.2%, respectively. The improvement of transmittance is attributed to the destructive interference of light reflected from interfaces between the different refractive-index layers with an optimized thickness. Such antireflection coatings of ZnO/SiO2 provide a promising route for solar energy applications. 相似文献
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D. V. Shtansky M. I. Petrzhik I. A. Bashkova F. V. Kiryukhantsev-Korneev A. N. Sheveĭko E. A. Levashov 《Physics of the Solid State》2006,48(7):1301-1308
This paper reports on the results of a comparative investigation into the physical, mechanical, and tribological characteristics of Ti-(Ca,Zr)-(C,N,O,P) coatings. The hardness, elastic modulus, elastic recovery, adhesion strength, friction coefficient, and wear rate of the coatings are determined. The specific features revealed in the deformation and fracture of the coatings deposited on various substrates in the course of adhesion tests are described. It is shown that the critical loads responsible for different types of adhesion and cohesion failure of the coatings can be determined from a set of parameters obtained during their scratching. The features observed in the behavior of the friction characteristics of the coatings during tribological tests in air and in a physiological solution are discussed. 相似文献
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Electromagnetic wave absorbing materials are being investigated as anti-electromagnetic interference coatings in self-concealing technology, and properties such as dielectric loss, conductive loss, and magnetic loss have been reported in the literature. These materials include metal oxides, alloy-epoxy composites, and especially metallic magnetic materials which have generated particular interest. 相似文献
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A. A. Gromov Yu. I. Strokova A. A. Ditts 《Russian Journal of Physical Chemistry B, Focus on Physics》2010,4(1):156-169
The physicochemical regularities of the formation of passivating coatings on particles of aluminum electroexplosion nanopowders
are examined by means of electron microscopy, X-ray diffraction, differential thermal, chemical analyses and X-ray photoelectron
spectroscopy. The thermal characteristics of inorganic passivating coatings for aluminum nanoparticles were demonstrated to
be more advantageous compared to organic coatings. The protective action of organic passivating coatings was shown to be independent
of their composition—only the particle size was found to be important. 相似文献
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E. N. Kotlikov V. A. Ivanov V. G. Pogareva E. V. Khonineva 《Optics and Spectroscopy》2000,88(5):718-720
Results of studying the absorption coefficients and refractive indices of PbTe and GeTe films in the spectral range from 1 to 15 μm are presented. The optical constants of films were found by a technique that combines calculation methods and the presence of strong absorption bands in the spectra. The spectral intervals were determined where the film-forming materials under consideration offer promise in the production of interference coatings for the IR spectral region. 相似文献
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Ba x Me1 ? x F2 binary fluoride films (“Me” denotes calcium or magnesium fluoride) are studied. A method of processing the reflection and transmission spectra is proposed to determine the optical constants. The dispersion dependences of the refractive indices and absorption coefficients of films in the range of 1.3–12 μm are found. Dispersion in films in the regions of additional absorption bands, which are absent in single crystals, is observed for the first time. It is shown that the films of binary fluorides have a higher packing density, a lower absorption, and better operating characteristics than do films of pure fluorides. The films are promising for application as optical interference coatings in the mid-IR spectral region. 相似文献
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J.C. Riao-Rojas E. Restrepo-Parra F.A. Prieto-Ortiz J.J. Olaya-Florez 《Superlattices and Microstructures》2008,43(5-6):564
In this work the application of different image processing techniques to low thickness coatings of CrN, NbN and TaN produced by unbalanced magnetron sputtering has been employed, in order to get an alternative methodology for calculating characteristics such as roughness, grain size and number of grains. The roughness can be compared with the degree of complexity or tortuosity and it can be indicated using the fractal dimension. Grain size is normally determined by measuring the diameter of many grains and averaging these values. Once the features had been calculated, a clustering process was implemented for classifying images of different materials employing the characteristics mentioned before. For this classification, the K-Means method was employed, and its performance was evaluated for each material (class), grouping the characteristics in five different ways. The conclusion was that CrN coatings were the best classified, contrasting with NbN coatings, which were difficult to classify. 相似文献
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伪装涂层材料的二向偏振散射研究 总被引:1,自引:0,他引:1
目标的偏振散射特征研究是偏振遥感应用的基础。在不同的条件下测量了伪装涂层的偏振参数,研究了入射角、观测方位角对涂层偏振散射特征的影响。研究发现,伪装涂层的面散射会产生较大的偏振度,而体散射具有消偏振效应;深色涂层因为面散射起主要作用而具有较大的偏振度;涂层散射光的偏振度与入射角成正比,在观测方位角接近镜面反射方向时最大,随着方位角的增加而迅速减小;草地的偏振度很小,与伪装涂层形成鲜明对比。利用偏振遥感可以有效地识别草地背景中的伪装目标,偏振测量在遥感和目标识别方面具有重要意义。 相似文献
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以聚氨酯(PU)为粘合剂,某片状金属粉为颜料,采用刮涂法制备了PU/片状金属复合涂层。对不同颜料含量条件下涂层的红外发射率进行了测试,并采用扫描电镜对涂层的微结构进行了观察。发射率测试结果表明,涂层发射率随金属粉含量增加呈“∪”型变化。微结构观察结果表明,PU/片状金属复合涂层由PU和片状金属粉交错堆叠而成,具有类似一维光子结构特征。基于涂层的微结构特征,对具有转折变化特征的4个金属粉含量点状态下涂层中一维光子结构的反射光谱进行了模拟计算,结果表明:PU/片状金属复合涂层的发射率随金属粉含量变化呈“∪”型变化关系特征主要是由涂层中一维光子结构的主反射峰中心波长随颜料含量增加所产生的蓝移现象引起的。 相似文献