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1.
光栅式自由立体显示器光学构成的理论研究   总被引:9,自引:3,他引:6  
王元庆 《现代显示》2003,125(3):29-32
自由立体显示器是新一代图像显示器件之一,其中基于光栅的立体显示器具有许多卓越的优点。本文首先分析了光栅式自由立体显示器的光学结构,在此基础上,进一步论述了狭缝式自由立体显示器的光学模型。  相似文献   

2.
裸眼立体显示器是不需要佩带助视眼镜的立体显示设备.它使用特殊的光学元件改变显示器和人眼的成像系统。文章讨论基于狭缝背光照明的液晶立体显示器的原理及其组成结构。利用通用的TFT LCD液晶显示器作为图像显示部件,通过科学设计符合立体显示照明原理的照明板部件.与液晶盒精密装配在一起组成裸眼立体显示屏,配合电路系统和显示软件完成裸眼立体显示器的系统结构设计。  相似文献   

3.
狭缝光栅自由立体显示器的立体图像串扰度   总被引:3,自引:1,他引:2  
为了表征狭缝光栅自由立体显示器存在的左右眼视差图像的混叠程度,提出了立体图像串扰度C的概念。根据狭缝光栅自由立体显示器的结构和工作原理,应用几何光学知识,分析得出了立体图像串扰度C的计算公式,并给出了一个具体的狭缝光栅自由立体显示器的计算结果。通过观看实验,证明了所定义的立体图像串扰度C可以定量描述观看者在立体可视区域看到的立体图像的串扰程度。  相似文献   

4.
狭缝光栅分光特性及其对视区的影响   总被引:1,自引:0,他引:1  
应用光栅等分光元件对视差图进行空间分离是实现立体显示的重要方法之一,介绍了狭缝光栅作为分光元件实现立体显示的原理,建立了子像素发光经过多个周期狭缝光栅的数学模型,分析狭缝光栅参数及子像素发光宽度对视区及立体显示器亮度的影响。结果表明,在对狭缝光栅参数设计过程中需要综合考虑视区特性与显示器亮度,狭缝的透光比应控制在0.2~0.3,在样机生产过程中将透光比定为0.25,采用高亮背光模式以补偿立体显示器亮度,取得了较好效果。结果对狭缝光栅的参数设计具有指导意义。  相似文献   

5.
裸眼立体显示液晶屏的光学结构及设计   总被引:9,自引:7,他引:2  
裸眼立体显示液晶屏以液晶像素作为立体视图的载体,使用特殊的光学元件改变显示器和人眼的成像系统来获取立体视觉效果。狭缝背光照明的裸眼立体显示液晶屏的光学结构包括狭缝照明板、液晶盒及背光组件。设计了可以完成面光源照明和线光源照明相互转换的可控光栅,研究了一种行之有效的立体显示液晶屏的装配方法——动态装配法,利用装配组件的工作特性产生莫尔条纹,完成立体显示液晶屏的精密装配。研制的裸眼立体显示液晶屏可以方便地在2D和3D显示模式之间转换。  相似文献   

6.
基于视差照明原理的自由立体显示几何建模   总被引:2,自引:5,他引:2  
在普通液晶显示器的背光源与LCD屏之间插入一块特殊的光栅板是主流自由立体显示器基本配置,照明盒与光栅板结合构成视差照明方式实现对LCD屏的照明。视差照明的基本功能是将LCD屏奇、偶像素列所对应的图像分别送入视者的左、右眼。本文从视差照明原理出发,依据几何光学原理建立自由立体显示器配置参数(光栅板和LCD屏的结构参数以及二者的位置等参数)与立体视觉参数(视者位置、双目瞳距和立体视带等参数)之间的关系的理论模型,为立体显示器的设计及其立体视觉性能评价提供理论支持。  相似文献   

7.
基于狭缝光照明的3D-LCD光学结构分析   总被引:5,自引:0,他引:5  
本文在分析立体视觉机理的基础上,介绍了一种以液晶显示器为基础的平板立体显示器。利用狭缝背光源照明液晶层,使得显示在液晶层的纵向条形左右图像,分别被观看者的左右眼观看到,从而形成自由立体图像。本文从光学的角度,对立体视觉机理、立体显示原理、用于液晶立体显示的狭缝背光源的光学原理作了详细分析。  相似文献   

8.
提出一种基于双狭缝光栅的裸眼三维立体投影机.该立体投影机由普通投影机组成的投影机阵列、投影屏和位于投影屏两侧的两个狭缝光栅组成.投影机阵列一侧的光栅对畸变的投影图像进行校对,以便图像的像素大小与位于观看者一侧的光栅的节距相匹配.对该立体投影机的立体显示原理、参数设计计算进行了阐述.实际研制了1台50英寸裸眼三维立体投影机样机,该样机采用了由4台液晶投影机组成的投影机阵列,能显示静态、动画和视频立体图像,其三维立体显示分辨率与相应二维平面显示分辨率相当.  相似文献   

9.
自由立体显示器观看视疲劳   总被引:9,自引:1,他引:8  
光栅式自由立体显示器具有性能优良的特点,是目前有很好应用前景的一类重要立体显示器,但由于它存在观看视疲劳问题而限制了其广泛应用.文章从分析立体显示视觉原理入手,系统阐述了引起自由立体显示器观看视疲劳的生理和立体显示器性能不佳两大原因,并提出相应的改善方法.该研究工作将对光栅式自由立体显示器的进一步研究和应用开发具有一定指导意义.  相似文献   

10.
自由立体显示器垂直交错狭缝光栅的设计   总被引:1,自引:1,他引:0  
针对传统的光栅式自由立体显示器设计方法中垂直光栅形成的莫尔条纹明显而斜光栅的对应可视区域较小这一问题.本文提出一种能减轻莫尔条纹的垂直交错光栅设计方法.以一个像素高度的1/2为单位对光栅进行分段,将相邻两段狭缝错开一定距离,减小通过同一狭缝看到两相邻子像素间黑条的比例,提高莫尔条纹中暗部分的亮度,从而减轻莫尔条纹.仿真...  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

15.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

16.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

17.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

18.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

19.
The effect of laser microbeam trapping the bioparticles has been appfied widely in the biology .However the micromechanism of the acting that realizes the laser-microbeam trapping bioparticles is still lacking. In this paper ,the act microchenism of the gradiant force of laser microbeam for the bioparticles is analysed by means of quantum theory ,The result accords with our experiment.  相似文献   

20.
Using multiple importance sampling (MIS) technique, the optical communication system performance affected by polarization-mode dispersion (PMD) and polarization-dependent loss (PDL) is simulated numerically. The power penalties and system outage probabilities are obtained for optical communication systems with on-off keying (OOK) or differential phase shift keying (DPSK) modulation. The simulation results show that DPSK always performs better than OOK. When the system has moderate PDL (about 1.5 dB), it is necessary to compensate effectively the fiber PMD in order to enhance the system tolerance to the PMD and PDL. However, the efficiency of PMD compensation will degrade rapidly when the PMD of the whole optical link drops into the low value.  相似文献   

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