随着广播电视技术的发展，虚拟演播室技术在电视行业中的应用已日趋成熟。但其中虚拟演播室的布光又不同于传统演播室的布光方法，本文通过平时工作中积累的经验来阐述下虚拟演播室的布光特点及注意事项。

With the development of radio and television technology, virtual studio technology application in the television industry has been mature. But one of the virtual studio lighting and different from the traditional studio lighting method, based on the work at ordinary times of experience to il ustrate the characteristics of virtual studio lighting and matters needing attention.

在分析电视演播厅舞台灯光布光控制系统技术要求的基础上，提出基于可编程控制器（ PLC）的电视演播厅布光控制系统设计方案。布光控制系统以PLC为控制核心部件，通过人机接口对指定的灯具进行要求的动作控制。设计了布光控制系统的硬件电路和软件部分，并进行了相应的实践应用。应用结果表明，该布光控制系统能够满足电视演播厅舞台灯光丰富多样性布光控制性能需求，系统结构合理，软件模块规范，性能稳定可靠，在电视演播厅布光控制的实践中具有广泛的应用前景。

This paper puts forward to the design of light arrangement control system for television stu-dio with PLC on the basis of analysing main technical requirements of light arrangement control system. This light arrangement control system could send control information to specified light with HMI by using PLC as core control component.This paper have analysed and designed hardware circuits and software section, and had made application.The application results showed that this light arrangement control sys-tem was able to meet the functional requirements of stage lighting control with rich diversity.This light ar-rangement control system is stable and reliable with reasonable structure and module specification, and it has good prospects for the further application for television studio.

基于布里渊散射的分布式光纤传感系统以其可在整根光纤中同时得到被测量场在时间和空间上的连续分布信息,进而成为传感领域国内外研究的热点。针对传统的布里渊光时域分析分布式传感器只能双端入射且成本较高的缺陷,探索性地提出了一种新型的单端布里渊损耗光时域分析传感结构。采用一台窄线宽激光器作为唯一光源,应用铌酸锂电光强度调制器调制入射光产生频移可调的脉冲泵浦光,与经过光纤布拉格光栅反射的连续探测光进行布里渊散射放大效应。通过检测探测光光功率,采用洛伦兹和高斯函数线性权重谱和Levenberg-Marquardt算法得到了不同脉宽下整根光纤布里渊损耗谱。实验结果初步证明了这种传感结构对于分布式测量是可行的,对单端BOTDA的研制具有一定的供参考价值。

Distributed optical fiber sensing system based on Brillouin scattering has attracted a widely attention as it can simultaneously obtain the continuous distributed information of time and space in the measured field. A novel Brillouin optical time-domain analysis (BOTDA)sensing configuration is presented,called single-ended BOTDA sys-tem. A narrow line-width laser was used as the only light source,and LiNbO3 electro-optics intensity modulator was a-dopted to modulate tunable frequency shift pulse pump light generated by incident light,the pump light with detection light reflected by fiber Bragg grating (FBG)was carried out Brillouin scattering amplification. Through detecting opti-cal power of detection light,Brillouin loss of the whole fiber was obtained with the different line-widths by linear weight spectrum of Lorentz and Gaussian function and Levenberg-Marquardt algorithm. Experimental results show the sensing structure is suitable to distributed measurement,and it has certain refe

研究了不同切割方式下CLBO晶体四倍频光反射损失情况,同时给出了激光倍频晶体实现减反射的优化布氏切割方法。对于非线性晶体来说,适用于激光晶体的布氏切割方法已经不能达到减反射的目的,这是由于光通过激光晶体后没有新频率产生,不改变光的偏振状态,而经过非线性晶体后却有新频率的激光产生,而这种新产生频率的振动状态与入射光的振动状态总不相同,这是由相位匹配条件和偏振匹配条件共同决定的,因而以布儒斯特角将两通光面平行切割的方法不再适合于此类晶体中。通过分析还得出,采取两通光面以互相垂直的布氏角切割晶体,可以达到对紫外光减反射的目的。

Losses of light reflection of cesium lithium borate (CLBO) crystal with four frequency muliplica?tion at different cutting modes is researched. Optimal Bruset cutting method of antirefelction implemented by la?ser multiplication frequency crystal is given. For nonlinear crystal, antireflection effect can not be got by the method which is suitable to laser crystal. The reason is that new frequency is not produced when light pass through the laser crystal and ploariztion states of the light are not changed. But new frequency is produced when light pass through nonlinear crystal. The vibration states of new frequency are always different from those of inci?dent light. It is determined by matching conditions of phase and polariztion together. So the method of two pass light surface cutting in parallel at Bruset angle is not suitable to the crystal any more. By analysis, if the crystal is cut by two pass light surface at Bruset angle perpendicular each other, UV light antireflection effect

本文结合实际探讨了网格式布光法及其在电视灯光中的应用技巧。

The article focuses on the method of grid lighting in the television lighting, according to practice.