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Russian PFG-03C panchromatic ultra-high resolution silver-halide emulsion is regarded as the most successful material for the fabrication of color reflection holograms. But the lack of established and reliable processing sequences prevents its practical applications in business and everyday life. Though much attention is drawn upon the processing of PFG-03C color reflection holograms, the color desaturation is still a problem. The article describes the new processing of color holograms recorded in PFG- 03C plates which is demonstrated experimentally to have the capacity of controlling the rendition wavelength shifts and improving the color desaturation effectively. The rendition spectra of Red-Green-Blue (R. G. B. ) single-line reflection holographic gratings, and the color reflection hologram as well, are given in this paper. 相似文献
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对不同时期和采用各种技术制作的彩色全息图以及所使用的记录材料进行了较全面的介绍。这些技术包括光全息术、计算全息术和数字全息术。并对彩色全息术的未来发展进行了展望。 相似文献
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Characteristics of the Wavelength Converted Signal in Wavelength Conversion Based on Cross-Gain Modulation 总被引:2,自引:0,他引:2
Shibao Wu Xiaohan Sun Mingde Zhang 《International Journal of Infrared and Millimeter Waves》2002,23(2):309-316
An analytical theory describing the frequency chirp characteristics of the wavelength converted signal in wavelength conversion based on cross-gain modulation (XGM) in semiconductor optical amplifier (SOA) is derived. By computation, we can see that low input pump power, high probe power, small line-width enhancement factor and low unsaturated single-pass gain of the SOA are favorable for reducing the frequency chirp of the wavelength converted signal. The analytical results have significance in understanding and designing wavelength converters. 相似文献
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以单轴应力作用下超晶格量子阱应变能带理论为基础,采用电子反射与干涉方法,研究了单轴应力对超晶格能带的影响,推导了单轴应力与超晶格导带子能级的定量关系。以GaAs-AlGaAs-GaAs为例,具体计算了导带中子能级对应力的依赖关系,进而给出了单轴应力对n型AlGaAs-GaAs量子阱红外探测器(QWIP)吸收波长的影响。计算结果表明,随着单轴压应力的增大,量子阱红外探测器的吸收波长表现出较明显的变化。当单轴压力增大到1.3GPa,量子阱红外探测器的吸收峰值移动了将近1.1μm,并且基本与应力呈线性关系。量子阱红外探测器吸收波长连续可调范围5.57~4.46μm。 相似文献
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LUO Jiang-Hua 《理论物理通讯》2011,55(1):128-132
In this paper, we have investigated theoretically the high harmonic generation form helium atom in long wavelength driving regime at2000 nm through solving time-dependent Schrödinger equation. By adding asecond harmonic pulse (1000~nm) and a UV attosecond pulse (200 nm) to the driving field, an efficient method for picking out and enhancing ionizationpath to generate high-yield supercontinuum harmonics is realized, and thenan isolated sub-100 as pulse with a bandwidth of 190 eV is significantly obtained. 相似文献
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为了解决现有数字全息显微系统中高分辨率与大记录视场无法同时兼得的问题, 提出了一种在不牺牲分辨率的前提下拓展数字全息显微记录视场的方法. 该方法中运用了波长不同、偏振态不同的四路相互不相干的探测物光, 同时探测被测样品四个相邻的不同区域, 并使这四束探测物光分别与其相应的参考光相干, 在记录面上同时记录下含有被测样品不同区域信息的复合全息图. 将获得的复合全息图经过频谱变换和数字滤波, 分别重构出所记录区域的振幅和相位分布.最后通过图像拼接和图像融合技术, 可实现接近原记录视场四倍的大视场数字全息显微记录. 该方法在测量过程中无需移动记录装置、光源和被测样品, 单次曝光即可实现, 实验结果验证了本文所提方法的可行性.
关键词:
数字全息显微术
角分复用
偏振复用
波长复用 相似文献
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Bernard Vidal 《光谱学快报》2013,46(5):615-623
When pyridine is para substituted to the nitrogen atom, the intensity of the long wavelength electronic transition is strongly decreased compared to the ortho and meta derivatives. N belonging to the ring, plays the part of a donating center when a strong electron withdrawing substituent is in the para position, and the part of an attracting center when faced to a donating substituent. the local transition moment vector of N, is in both cases opposed to the vector of the substituent. Furthermore, the π HOMO is priviledged (instead of the two highest π MO in benzene), and this HOMO does not allow a strong interaction with the substituent in the para position. 相似文献
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Mitsuo Ikeda Pontawee Pungrassamee Pichayada Katemake Aran Hansuebsai 《Optical Review》2006,13(5):388-395
Color appearance was measured for a test patch which was placed in a test room illuminated by the daylight type of illumination
and was looked at from the subject room illuminated by one of the four colored illuminations, red, yellow, green, and blue,
through a window of three different sizes. When the window was the smallest so that only the test patch was seen within the
window the color of the test patch appeared almost opponent to the illumination color, but as soon as something is seen within
the window of larger size the color returned to the original color of the test patch to indicate the color constancy. To recognize
the test room as a space was essential to perceive the real color of the test patch. This returning to the original colors
was not influenced by green color of objects densely placed in the test room or by red color of objects again densely placed
in the test room. The results imply that the color appearance of the test patch is not determined by the retinal chromatic
adaptation, but by the brain adaptation to color of the illumination in the space. 相似文献
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使用新型的WSM-T-Ⅱ型台式迈克尔逊干涉仪可以测量氦氖激光波长,传统的数据处理方法是逐差法,计算量大,既繁琐又容易出错。用Matlab软件的编程法处理实验测得的数据,程序运行后可以直接得到氦氖激光波长及相应的误差分析,无需进行运算,准确而快捷,是大学物理实验教学中实验数据处理的一种新方法。 相似文献
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提出一种在显微镜照明光路上实现假彩色编码的方法,即在照明光路上对光源进行分区彩色编码,以得到彩色化的显微图像。 相似文献
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利用金刚石氮空位色心体系耦合于一个双边的光子晶体腔(该光子晶体腔与两个波导耦合)来制备Bell态、GHZ态和团簇态。当光子被探测和进行幺正操作后,就得到纠缠态。同时计算了该体系的保真度,发现在近似参数条件下,该模型可得到较好结果。 相似文献
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We investigated color discriminability on the background color. The measurement was carried out at over 21 background colors in (L, M) plane of a cone space by four observers. We used low temporal stimulus frequency (1 Hz) so that threshold was determined by the red-green opponent mechanism. Results showed that color discriminability depends on the background colors. Threshold was higher with a more saturated background color. This suggests that the sensitivity of the red-green opponent mechanism is high when the mechanism’s output is small and increases with the output levels of the mechanism. To confirm this relationship between the red-green mechanism and color discriminability, color appearance depending the background color was also evaluated. There was a strong correlation between the sensitivity and the perceived whiteness. Both sensitivity and whiteness value were highest at around the equal energy white point and decreased with increase in the difference between background color and equal energy white. This suggests that the adaptation state of the red-green opponent color controls color discrimination. 相似文献
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短波长相变光盘记录介质Ge2Sb2Te5薄膜的制备及静态性能研究 总被引:1,自引:0,他引:1
研究了632.8nm波长下适用的相变光盘介质Ge2Sb2Te5薄膜的制备方法和静态光存诸记录特性,发现该薄膜可在100ns条件下实现直接重写,在优化膜层结构后,写擦循环次数高达10^6,反射率对比度在15%以上。 相似文献
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光谱颜色科学研究进展及其在中药领域中应用前景分析 总被引:1,自引:0,他引:1
综述了光谱颜色科学的研究进展,近年来常用的颜色模型及颜色测量仪器,归纳总结测色技术在农业、食品、工业、医药等领域的应用进展。探讨测色技术实现中药外观色泽量化的可能性,并分析其在中药领域中的应用前景,为实现中药无损在线的质量控制规范化研究提供示范。 相似文献
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Parisa Maboodi Soheila Hemmatzadeh Seyyed Hossein Asadpour H. Rahimpour Soleimani 《理论物理通讯》2014,62(6):864-870
The behavior of the Goos-Hänchen (GH) shifts of the reflected and transmitted probe light beams is theoretically investigated. In a fixed geometrical configuration, the effect of quantum interference induced by spontaneous emission on the phase control of the GH shifts is analyzed in this paper. It is found that in a four-level N-type atomic system as an intracavity medium, the GH shifts of the reflected and transmitted probe light beam are completely phase dependent. 相似文献