关于光在介质表面反射的半波损失问题

对于光在反射时的半波损失问题，就《大学物理》上已发表的章和已出版的教科书中的有关论述作一回顾，阐明对此问题是怎样一步步讨论得全面、清楚的。     

一种实时测量和表征超薄SiO2薄膜的实验方法

采用Ｐ－偏振傅里叶变换红外反射吸收光谱技术，实现了对溅射型顺旋共振微波等离子体技术制备的超薄ＳｉＯ２薄膜的实时监测和表征。实验表明：该方法是一种无损伤性、快速而准确的实时分析ＳｉＯ２薄膜质量的有效方法。     

板几何中具反射边界条件的迁移算子的谱分析

在Lp(1 p<∞)空间上研究了板几何中具反射边界条件下各向异性、连续能量、非均匀介质的迁移方程,证明了该迁移算子产生C0半群的Dyson-Phillips展开式的二阶余项在Lp(1相似文献   

氢、氘和氚离子在固体表面上的反射

本文应用最近发展的离子输运双群模型计算了氢,氘和氚离子在固体表面的反射系数。与有关的实验资料和Monte-Carlo计算比较表明,双群模型所取得的结果是合理的、可用的。同时也表明了双群模型有可能成为研究离子在固体表面反射的有效的理论方法。 关键词：     

Sol-gel preparation of a silica enhanced hydrophobicity and antireflective coating with optical stability in vacuum

A new silica antireflective coating with improved hydrophobicity and optical stability in a vacuum is obtained by a two-step route. Firstly, silica sols are prepared with a sol-gel process, in which tetraethyl orthosilicate is utilized as a precursor. And by introduction of fluorine containing glycol into the sols, the porosity of silica particles and surface polarity of the coatings are decreased. Afterward, coatings are constructed with low surface roughness by modification of PMBA-PMMA. The coatings retain transmission of up to 99.6%, and laser damage threshold of about 50 J/cm^2 at a wavelenth of 532 nm （1-on-1. 10 ns）     

Parameterization of land surface albedo

Remote measurements of Earth’s surface from ground, airborne, and spaceborne instruments show that its albedo is highly variable and is sensitive to solar zenith angle（SZA） and atmospheric opacity. Using a validated radiative transfer calculating toolbox, DISORT and a bidirectional reflectance distribution function library, AMBRALS, a land surface albedo（LSA） lookup table（LUT） is produced with respect to SZA and aerosol optical depth. With the LUT, spectral and broadband LSA can be obtained at any given illumination geometries and atmospheric conditions. It provides a fast and accurate way to simulate surface reflectance over large temporal and spatial scales for climate study.     

Effects of light intensity on reflective ghost imaging

In this letter, we analyze the effects of light intensity find that the brightness of reflective ghost image can on reflective ghost imaging with thermal source. We be changed by modulating the light intensity of the source and the splitting ratio of the beam splitter. The signal-to-noise ratio will be improved by increa.sing the light intensity of the source. More important, we can obtain the reflective ghost image with high image quality by adopting a low light intensity signal beam and a high light intensity reference beam, which is better than the classical optical imaging, because it can reduce the effects of light on the object.