利用光反射精确测量亚共析碳钢的含碳量

本文从光学角度出发提出了一种经济实用、精度高的测量亚共析碳钢中碳的含量的新方法。阐述了该方法的测量原理，即以金相试样表面对光的反射程度来判定其含碳量，并给出了有关经验公式及数据处理方法。     

新型显示器件进展

介绍了有源（光发射）和无源（光反射）显示器件－气体－电子－荧光粉显示，冷阴极场致发射矩阵平板显示、电泳成像显示和电化学显示器件等的发展情况。     

辽宁电视台新闻演播室透视反光照明解决方案

辽宁电视台新闻演播室以主持人身后的透视玻璃窗、导播间为背景,这样难免会产生反射光以及灯的成像进入镜头,本文就这一问题的解决进行了探讨,对解决方案进行了详尽的说明。     

Comparison between photoluminescence spectroscopy and photoreflectance spectroscopy in CuGaSe2 epilayer

Photoluminescence （PL） spectroscopy and photoreflectance （PR） spectroscopy are very useful techniques for studying the properties of materials. In this paper, the same material of Cu-rich metal-organic vapour phase epitaxy （MOVPE） grown CuGaSe2 layer is investigated in a temperature range from 20 to 300 K to compare these two techniques. Both PL and PR spectra appear red shifted, less intense and broadened. The temperature dependence of interband transitions is studied by using the Manoogian Leclerc equation. The values of the band gap energy at T=0K and the effective phonon temperature are estimated. The temperature dependences of intensities and broadenings of PL and PR spectral lines are also analysed. Based on the results of the comparison, the features and applications of the PL and PR can be shown in detail.     

Temperature Dependence of Thermal Emission Rate in Cr:GaAs

The new method of measuring the ratio of thermal emission rate to the photoexcitation constant os presented.The temperature dependence of the ratio for Cr:GaAs is calculated by using the previously published data of two- wave mixing,Results show that the calculating data and previous phenmenological theoretic ones coincide with each other very well.     

Single Mode Er-Doped π-Phase-Shifted Distributed Feedback Fibre Grating Laser

A novel method incorporating the shielded method and the post-processing method has been proposed to fabricate the π-phase-shifted fibre grating. Then an Er-doped π-phase-shifted distributed feedback fibre grating laser has been fabricated using the grating. The laser threshold is 20mW. When pumped with 90mW light at 980nm, the laser gives an output of 1.1mW. Its signal-to-noise ratio is better than 60dB. It is demonstrated that the laser is single mode operation by means of a Fabry--Perot scanning interferometer.     

超小超薄封装COBP光反射器促使手机相机模块小型化

新口水无线现已开发完成rcoBP(Chip On Board Package)光反射器NJL5901R-2/NJL5902R-2,该产品最适合于 自动对焦的手机相机模块,并已开始供货. 自动对焦(AF)的手机相机模块是根据镜头和感光元件、马达、镜头位置检测用的光传感器(光反射器)等周边配件而构建的.随着手机轻薄尺寸的需求,对手机相机模块要求更微小、更低背化.特别是对于低背化,为了确保镜头和感光元件之间的焦点距离,镜头的口径就必须大,这样手机相机模块整体的尺寸就受到了限制,所使用的周边配件就要求更加小型化.新日本无线为了满足这种要求,开发了比以往的产品更加小型的COBP光反射器NJL5901R-2/NJL5902R-2.典型应用为相机模块AF的位置检测、用于手抖动校正系统的位置检测,及其它各种检测用途.     

BenQE600春の物语

春天万物复苏，大地生机勃勃，为留住明媚春光下的翩跹身影，我按动BenQE600的快门，即发现自己也成为被拍摄的对象。E600时尚的金属外壳将春日阳光反射入她的眸中，她发现了手持时尚卡片相机E600的酷酷的我。     

玻璃在线激光测厚误差的透反互补抑制

为了抑制激光在线测厚时入射角波动引起的误差,根据几何光学分析了激光透射式和反射式测厚原理,发现激光在特定入射角附近波动时,两种方式的测厚误差一正一负,具有互补性,在此基础上提出基于透射和反射同时测量的互补式测厚方法,该方法可将误差限定在透射式和反射式测量误差之间,抑制在线测厚误差.对于有机玻璃平板,理论计算表明,当激光入射角在67.013°±4°波动时,相对误差绝对值在1%以内,误差抑制率均值大于90%;当入射角为61.536°时,误差抑制率为100%.利用线结构激光器和两个线阵CCD相机搭建互补式测厚实验系统,测量了标称厚度为1~5mm的有机玻璃平板,与透射式和反射式测厚结果进行对照,除厚度为1mm的玻璃外,互补式测厚误差被限制在透射式和反射式之间,最大误差抑制率达61%.实验结果表明,该互补式方法有效抑制了误差,提高了在线厚度测量准确度,解决了在线测量不可重复性导致的无法通过均值法减小误差的问题.     

Timax（特玛偲）Gen Grey

Timax（特玛偲）Gen Grey1080亮光幕布是专为明亮投影环境设计的投影荧幕,增益为1．57。幕布表面80。灰质涂层,具有优秀的抗环境光能力．环境光反射干扰可有效降低90％,从而保证画面对比度,可以在光线明亮的情况下使用,具有很好的环境适应性,适合一般家庭使用。幕面雕刻光学花纹,平整光滑,画面聚焦精确,可有效消除眩光,保持画面细腻度,同时提升和补偿投射光线的暗色部分,有效提高黑位感和色彩饱和度,固定的珈玛值为1．1,图像还原清晰自然。