带双投影物镜和全息屏幕的投影型全息显微镜

本文提出了一种可用于集成电路装配和质量控制的、带有双投影物镜和全息光学元件散射全息屏幕的投影型全息显微镜(PHM)系统。介绍了该系统的光学原理、全息散射屏幕的记录方案、系统色差的改善和投影显微系统的特性。     

潜式全息瞄准器的光学系统设计

在折叠紧凑匹配型全息瞄准器的光学系统基础上设计了一种新型潜式激光全息瞄准器。瞄准器的核心部分是由两个衍射匹配的全息光学元件和光学拐角辅助系统组成。阐述了潜式全息瞄准器的原理、设计方案及制作方法。通过实验与分析说明了该系统能实现拐弯射击的功能,达到隐蔽射击的效果。     

基于全息光学元件的增强现实3D显示系统

设计了一种基于全息光学元件的透视增强现实集成成像3D显示系统。对基于反射体全息原理的全息光学元件的记录及再现做了理论分析,并通过搭建实验光路记录一块尺寸为20mm×20mm的全息光学元件。该全息光学元件仅对满足布拉格条件的光线体现出微透镜阵列成像功能,再现出虚拟的3D图像,而真实3D物体发出的光线可以直接透过全息光学元件,因此该全息光学元件作为图像融合元件实现了真实3D物体与虚拟3D图像的融合。该实验研制的透视增强现实3D显示系统能够再现出较好的虚拟3D图像,有效地融合虚拟3D图像和真实3D物体,实现增强现实的3D显示效果。     

图像柱面压缩全息光学元件的制作技术

文章旨在提出一种用于激光直写合成全息拍摄的全息光学元件的制作技术。实验结合激光直写合成全息拍摄时所需柱面透镜的功能,参考全息光学元件的制作原理来制作图像柱面压缩全息光学元件,实现柱面透镜的光学功能,并使元件具有大面积、短焦距、会聚光均匀分布的特点,满足激光直写合成全息拍摄对图像的需求。通过实验,应用自制全息光学元件拍摄出来的全息图具有较好的水平视差和较大的视场角,并具有较高的衍射效率。实验和理论分析表明,用文章所提出的图像柱面压缩全息光学元件来代替传统的光学元件,进行激光直写合成全息图的记录是一种十分可行的,可以有效改进图像质量,提高光能利用率的方法。     

试论光学全息是一个非线性过程

本文从非线性光学的基本定义出发,分析和讨论了光学全息与非线性光学中四波混频的关系。明确指出,光学全息也是一种非线性光学过程,同时,由实验结果说明理论分析的正确性。     

专利

美国加州的Levine M S发明一种全息气体分析仪.用这种仪器可以确定在流体介质中光吸收物质的存在.该分析仪是由一组非色散全息光学元件、光源和探测器组成.该组全息光学元件中至少有一个全息元件使光源发出的光至少一部分通过会聚光学元件反射到该组全息光学元件中的另一个全息元件.全息光学元件中的一个光学元件把一部分光反射到光探测器,得到气体分析结果.(美国专利号:5854685)(No.44)量子线激光器     

非线性光学四波混频与全息术

本文论述了全息本和四波混频之间的相似性。明确指出光学全息实质上也是一种非线性光学现象。实验结果与理论分析相符合。     

全息成象方法的改进

本发明涉及全息成象技术,特别涉及全息成象平视显示系统.全息摄影术的最新进展使全息图能够用作平视显示系统的光学元件.全息光学元件较之常规光学元件有很多优点,例如重量轻、对表面光洁度的灵敏性大大降低,且成本也比同等的常规学元光件的成本低.     

改善光学扫描全息聚焦层图像效果的实验研究

为了改善光学扫描全息系统聚焦层重建图像的效果,采用随机相位光瞳替代传统针孔光瞳的方法,进行了理论的分析和实验验证,分别得到了传统光学扫描全息和基于随机相位编码的光学扫描全息系统下重建图像和原图像之间的信噪比、相关系数以及频谱分布比较结果。结果表明,在实验条件相同的情况下,基于随机相位编码的光学扫描全息系统重建的图像具有更高的信噪比和相关系数,且其图像频谱和原图像频谱曲线的变化趋势更相似,因而更接近于原图像。     

用于常规光学检验的全息干涉仪

描述了一种适用于凹、凸球面,凹、凸透镜,非球面透镜,平面,柱面以及透镜系统等常规光学检验的新型全息干涉系统。该系统结构简单,调整方便,并可以用作检验大口径光学元件而勿需同样尺寸的高质量参考光学件。     

Optical scanning holography

This paper provides a tutorial on the principles of holography, followed by a review of a newly developed 3-D imaging technique in which 3-D optical information of an object cam be extracted by a 2-D optical scan of the object. The technique is called optical scanning holography (OSH). In the context of optical scanning holography, we discuss some of its potential applications such as holographic information transmission and television (TV) system, 3-D image coding and decoding, 3-D microscopy, and 3-D optical remote sensing. In most cases, feasibility has been proven but awaits broader application     

光学扫描全息术及其计算机仿真

提出了一种新的全息术——光学扫描全息术，它是建立在光学扫描之上的光电混合处理技术。阐明了扫描全息术的基本原理，给出了计算机仿真的结果。     

光纤全息技术研究与发展

本文介绍了光纤全息技术的原理和到目前为止国内外出现的各种技术方案.同时对光纤全息技术的应用前景作了简要阐述.     

Microwave holographic interferometry

Microwave holography is an extension of the optical holography to the microwave field. In fact, by using a well-known characteristic of the holographic process, it is possible to record the hologram at frequencies very far from the optical region (microwave) and to reconstruct a visible image by laser light. This paper describes the experimental apparatus and the technique used for obtaining a satisfactory optical wave reconstruction from microwave holograms. The resolving power of the system which was experimentally tested, and visible images of microwave transparencies and of a back scattering object are given. As an alternative application of the microwave holography together with the optical wave reconstruction, in this paper, extension of holographic interferometry to the microwave region is suggested, and the visible image of a deformed object crossed by fringes due to microwave interference is also shown. This technique can find applications, for instance, in the mapping of the earth's deformations or in that of the tides. Different aspects of the microwave holographic interferometry have been also discussed.     

Holography and its application to acoustic imaging

This paper briefly reviews some aspects of holography and its application to acoustic imaging with an emphasis on concept. Included age discussions of the identity of holography, the principle of optical holography, holography applied to the acoustic domain and holography by linear detection, the applications of optical and acoustic holography, the concept and front-end embodiment of acoustic imaging systems that can be considered holographic, and the limitations of acoustic holography. This paper is intended to be tutorial and to provide discussions on relevant topics not covered by other papers in this issue on the subject of holography.     

Space-time processing with photorefractive volume holography

Photorefractive volume holography for processing ultrashort optical pulses carrying spatial, temporal, and spatiotemporal optical information is introduced. These new holographic methods can process temporal information, i.e., the temporal evolution of optical pulse signals, in addition to the usual spatial information. Photorefractive volume holographic materials provide the medium necessary for recording and reconstruction of such optical information in real time. Spatial and temporal holography with photorefractive volume holographic materials are introduced, compared, and discussed. The direct time-domain holography is shown to possess two disadvantages, low fringe contrast and limited recording time, which is overcome by using the method of spectral domain holography. Applications of direct time-domain and spectral-domain holography for image processing, temporal matched filtering, optical pulse shaping, three-dimensional (3-D) optical storage, and optical interconnects are discussed. Furthermore, the combined space-time holographic processing that allows the conversion between the spatial and the temporal optical information carrying channels is introduced. This method is used to demonstrate experimentally parallel-to-serial and serial-to-parallel data conversion for one-dimensional (1-D) images and image-format data transmission. The demonstrated holographic processors provide the advantages of self-referenced signal transmission and self-compensation for optical dispersion induced by the holographic materials, communication channel, as well as other optical components     

全息术在现代光学中的应用

随着近几年对光学全息术的进一步探索和研究,发现其在人工神经网络、高密度存储、光镊、信息编码译码和光束扭曲打结等方面有着广泛的应用,本文对全息术的原理及在现代光学中的应用做了简要介绍。     

计算机生成全息实时显示技术的研究现状

计算机生成全息图技术将计算机技术与全息技术结合在一起,是近年来研究的热点。重点介绍了可应用于全息实时显示的计算机生成全息图的实现方法,分析了目前计算机生成全息图的技术难点,并对三维显示技术的应用前景进行了展望。     

Fast Holographic Image Reconstruction Using Phase‐Shifting Assisted Depth Detection Scheme for Optical Scanning Holography

For the implementation of a real‐time holographic camera, fast and automatic holographic image reconstruction is an essential technology. In this paper, we propose a new automatic depth‐detection algorithm for fast holography reconstruction, which is particularly useful for optical scanning holography. The proposed algorithm is based on the inherent phase difference information in the heterodyne signals, and operates without any additional optical or electrical components. An optical scanning holography setup was created using a heterodyne frequency of 4 MHz with a 500‐mm distance and 5‐mm depth resolution. The reconstruction processing time was measured to be 0.76 s, showing a 62% time reduction compared to a recent study.