投影光学迅速发展

投影光学既属于经典光学的范畴也可被看作一门新兴学科。经典光学包括:望远光学、显微光学、摄影光学和投影光学。在这四大经典光学中,投影光学最为薄弱。最原始的投影技术被应用于投影绘画,以后发展成幻灯放映技术、电影放映技术和投影测量技术。多年来投影光学进步缓慢,并且局限于光源、照明系统以及投放镜头的研究三个方面,这是由于投影     

佛山市王氏光电科技有限公司

佛山市王氏光电科技有限公司是一家专业从事光学投影屏幕研发生产及销售为一体的公司。其母公司王氏集团在光学领域潜心研究20年多年．在航空航天．军用车灯．镜片等光学领导取得巨大的成就和贡献．在20多年的光学领域的积累和潜心研发下,王氏光电研发了独有的屏幕核心技术,解决了屏幕增益．视觉．对比度．三大矛盾基点．呈现给人全新的视觉享受。     

中国光学元器件行业发展概况北大核心CSCD

本文简要归纳了建国以来国内光学元器件制造技术的进步以及产业规模的变化,谨从近十年光学元器件产品的市场规模及十年间光学元器件的主要下游应用领域从照相投影转向以智能手机为代表的消费电子的发展变化,尤其是2020年度中国光学元器件行业的发展情况来展示中国光学元器件行业发展现状。     

透射式双波段红外搜索跟踪系统光学物镜

给出了一种适用于红外搜索跟踪系统的透射式双波段(中波/长波)光学物镜,两个波段的相对口径均为1/1.3,工作波段分别为3.7~4.8μm和7.5~10.5μm,视场为±1.75°。为提高光学透过率,物镜采用会聚光路分光,每个波段仅有4片透镜,其中各有2片采用了衍射光学表面,实测两个波段的光学透过率(含分光镜)均大于70%。     

底发射VCSEL片上点阵结构光投影装置设计

为解决现有点阵结构光投影装置中准直透镜会导致较强的零级衍射而造成投影点阵光强分布不均匀的问题,提出了一种基于底发射垂直腔面发射激光器的片上点阵光投影装置结构,并给出了衍射光学元件设计思路。首先对目标光场进行光强调整和坐标变换,在无准直透镜情况下利用基于瑞利-索末菲衍射积分的Gerchberg-Saxton改进算法获得片上衍射光学元件的相位分布,并最终对该点阵投影装置的投影效果进行评估。结果表明:在衍射光学元件设计过程中采用高斯光束作为光源时,该结构能更好地抑制零级衍射,获得光强分布更加均匀的投影点阵。此外,该结构不仅可省去透镜的安装,减小投影装置尺寸,还可通过流片工艺实现光源和衍射光学元件一体化集成。     

基于反射式达曼光栅的频率分辨光学开关装置

采用反射式达曼光栅对飞秒激光进行分束,可以避免材料色散的影响.搭建了利用反射式1×2达曼光栅为基础的频率分辨光学开关(FROG)装置,并把测量结果与传统多发频率分辨光学开关装置的测量结果进行了对比.理论和实验结果表明,当输入脉冲宽度大于50 fs时,用达曼光栅作为分光器和使用分光镜分光的效果是一样的;当输入脉冲的宽度小于50 fs时,用达曼光栅作为分光器引入的展宽量明显小于分光镜引入的展宽量,尤其是当输入脉冲的宽度小于20 fs时用达曼光栅作为分光器的效果更为突出.     

生物折射率三维无标记定量成像研究进展

折射率是生物样本最重要的光学属性,经常作为内源性“标记物”进行无标记定量成像。虽然通过测量光程差获取相位信息的传统定量相位成像方法已被广泛研究,然而其获取的相位结果是样本折射率与厚度的耦合产物,无法重建三维形态学信息。近年来,以光学投影层析方法为开端,研究人员率先开启了以三维折射率定量成像为目标的形态学特征重建方法研究。然而光学投影层析方法未考虑衍射效应,导致其精度不足。为解决该问题,基于散射反演求解的光学衍射层析技术应运而生,并在无标记生物三维成像方面展现出巨大的潜力。本文锁定生物折射率三维无标记定量成像研究,聚焦光学投影层析和光学衍射层析两种方法的发展历程,从正向测量模型、反演算法以及实现方法三方面进行综述,并对该研究未来的工作进行展望。     

投影显示中的光学薄膜元件

介绍了液品显示器(LCD)投影、数字光处理(DLP)投影和硅基液晶(LCOS)投影的显示原理及光学薄膜元件在投影中的应用情况,对隔红外紫外滤光片、二向色镜、减反射膜及偏振分束镜的光学性能作了详细分析.     

基于DMD的红外场景仿真系统光学引擎设计

针对DMD(Digital Micromirror Device)器件是针对可见光波段设计,直接用于红外波段会遇到问题,提出了一种远心投影光学引擎架构,包括投影光学系统和照明光学系统.该光学引擎采用柯勒远心照明架构,并引入一片场镜来分离投影和照明光束.这种光学引擎结构紧凑、照明均匀、光能利用率高.     

光学三维传感

介绍了光学三维传感的几种主要的方法,例如:传播时间法、光学三角测量法、光栅投影法等,并且对它们作了比较和总结.这可以作为今后正确和广泛应用三维传感技术的参考.     

照亮廿一世纪之光--纪念激光发明四十周年

没有科学大师的创新思维，就没有激光的发明。激光的发明，使电子学推进到光频电磁波段，产生了光频电子学，简称光电子学；激光的发明，同时也使传统光学推进到信息领域，形成了相干光学，或光子学。激光的进一步发展，将光信息网络遍布整个社会，照亮廿一世纪。     

Wavelet processing and optics

Fourier optics has offered a powerful global information analysis and processing tool to optical domain signals and images and firmly locked its respectable position in the history of optics. The evolution of wavelet theory in the past decade, which has created significant impacts on many areas of information science and engineering, has recently been frequently mentioned in the optics community. Whether or not this locality-oriented signal analysis and processing tool can play a comparably significant role in optics remains to be answered. The present paper is intended to summarize important developments and recent progress in areas where novel wavelet processing concepts are incorporated into optics research     

Total transmission from deep learning designs

Total transmission plays an important role in efficiency improvement and wavefront control, and has made great progress in many applications, such as the optical film and signal transmission. Therefore, many traditional physical methods represented by transformation optics have been studied to achieve total transmission. However, these methods have strict limitations on the size of the photonic structure, and the calculation is complex. Here, we exploit deep learning to achieve this goal. In deep learning, the data-driven prediction and design are carried out by artificial neural networks (ANNs), which provide a convenient architecture for large dataset problems. By taking the transmission characteristic of the multi-layer stacks as an example, we demonstrate how optical materials can be designed by using ANNs. The trained network directly establishes the mapping from optical materials to transmission spectra, and enables the forward spectral prediction and inverse material design of total transmission in the given parameter space. Our work paves the way for the optical material design with special properties based on deep learning.     

纯位相液晶调制器的响应特性计算

液晶位相调制器在非显示领域有广泛的应用,例如自适应光学中的波前校正、大气湍流模拟、光学相控阵的光束指向等。在这些应用中液晶的响应速度、位相调制范围、色散等特性非常关键。围绕对这些特性的改进,本文总结了近年来人们在液晶器件设计、驱动方法改进以及液晶色散研究方面的理论计算方法,这为人们在提高液晶器件电光响应特性、预期其性能等方面的需求,提供了非常有价值的参考。     

缩小投影电子束曝光原理论证机

系统阐述了缩小投影（或纳米投影）电子束曝光技术的原理,以及如何将一台透射电镜改装为原理论证机的主要过程。内容包括机械结构的变动、电子光路的选择、调焦及曝光、成像系统的逐步演化、实验曝光结果与结论。     

Optical Clock Distribution in Electronic Systems

Techniques for distribution of optical signals, both free space and guided, within electronic systems has been extensively investigated over more than a decade. Particularly at the lower levels of packaging (intra-chip and chip-to-chip), miniaturized optical elements including diffractive optics and micro-refractive optics have received considerable attention. In the case of optical distribution of data, there is the need for a source of optical power and a need for a means of modulating the optical beam to achieve data communications. As the number of optical data interconnections increases, the technical challenges of providing an efficient realization of the optical data interconnections also increases. Among the system signals which might be transmitted optically, clock distribution represents a substantially simplified problem from the perspective of the optical sources required. In particular, a single optical source, modulated to provide the clock signal, replaces the multitude of optical sources/modulators which would be needed for extensive optical data interconnections. Using this single optical clock source, the technical problem reduces largely to splitting of the optical clock beam into a multiplicity of optical clock beams and distribution of the individual clocks to the several portions of the system requiring synchronized clocks. The distribution problem allows exploitation of a wide variety of passive, miniaturized optical elements (with diffractive optics playing a substantial role). This article reviews many of the approaches which have been explored for optical clock distribution, ranging from optical clock distribution within lower levels of the system packaging hierarchy through optical clock distribution among separate boards of a complex system. Although optical clock distribution has not yet seen significant practical application, it is evident that the technical foundation for such clock distribution is well established. As clock rates increase to 1 GHz and higher, the practical advantages of optical clock distribution will also increase, limited primarily by the cost of the optical components used and the manufacturability of an overall electronic system in which optical clock distribution has been selectively inserted.     

分离式光盘光学头光学问题讨论

本文根据几何光学与物理光学基本原理,分析了分离式光学头导向误差、光束孔径匹配问题,给出了单光束分离式光学头结构.     

Digital optics

The authors discuss digital optics, a technology for processing, transport, and storage of optical digital information. Digital optics offers both the high temporal bandwidth of fiber communications and the high connectivity and information density of optical imaging. The energy dissipation per bit of communicated information, as well as the chip area dedicated to interconnections, can be significantly lower in optics than in high-speed electronics. This motivates the introduction of parallel optical interconnections through free space in communication-intensive areas of digital information processing such as switching in telecommunications and within multiprocessors. Digital optical circuits can be constructed by cascading two-dimensional planar arrays of optical logic gates interconnected in free space. The state of the art and the trends in digital optical information processing systems for optical logic, optoelectronic interfaces, and optical free-space interconnection systems are reviewed     

低温红外光学透镜支撑结构研究

在低温红外光学系统中,光学元件及其支撑结构的加工和装配温度与其实际工作环境温度之间存在较大差异。根据低温红外光学系统对光机结构设计的要求,设计和加工了一套适用于低温光学透镜的柔性支撑结构。透镜的径向定位与支撑采用一组周向均布的悬臂柔性支撑结构来实现;轴向则采用压圈定位和波形垫圈来为透镜提供轴向预紧,以避免由于温差以及材料的物理性能差异与变化而造成透镜面型无法满足指标要求。试验结果表明,这种透镜支撑结构在133 K低温下具有良好的成像效果。