用全息三波面干涉法产生透镜阵列

采用三次曝光在全息图上依次记录下三个两两波法线夹角相等的平面波。然后用原参考光照射处理后的全息图，同时再出现三个平面波，得到三光束干涉的六角形蜂窝状阵列式空间光强分布。     

采用全息方法实现的光学折叠PS互连网络

提出了一种应用复合全息透镜实现二维折叠完全混洗（ＰＳ）的方法，它具有成本低，制作工艺简单，易复制及易分割等一系列优点，并通过实验予以了验证。     

新型全息光学测头的研制

本文设计了一种新型全息光学测头，这种测头通过新型全息光学元件（ＮＨＯＥ），将被测表面的两个测点的信息综合在一个接收器上，利用自补偿原理，消除了被测表面相对光轴倾斜对测量结果的影响。     

多功能全息透镜用于测量类镜表面的平整度

基于自聚焦误差检测和光路可逆原理，分析并实验证明了利用一种多功能全息透镜来测量类镜表面平整度的可行性。实验结果表明其测量精度可达微米量级。     

光全息中傅里叶变换透镜设计

针对光学全息再现像质较差,本文提出四片式近似全对称傅里叶变换透镜的设计.该设计根据电寻址液晶和CCD对傅里叶变换透镜的匹配要求确定设计参数.为了缩短总长,系统采用双远距结构,并利用ZEMAX自动设计软件进行优化设计.将设计结果应用于实验,获得了清晰的光学全息再现像.实验结果表明,该设计的各项指标与实验系统相匹配,具有结...     

用光学全息方法研制软X射线Bragg—Fresnel光学元件

介绍了软Ｘ射线Ｂｒａｇｇ－Ｆｒｅｓｎｅｌ光学元件的特点,并以磁控溅射法制备多层膜,再采用光学全息方法在涂有光刻胶的多层膜表面上形成波带片图形,通过显影、离子束刻蚀完成元件的制作 。     

复合静电—磁浸没透镜的宽束曲轴聚焦性质及像差理论

研究了新型的复合静电－磁浸没透镜的曲光轴高斯电子光学性质及像差特性。应用宽束曲轴理论，导出了三维局部正交坐标系中的电子运动的中心轨迹方程和曲光轴的近轴轨迹方程；利用数学软件Mathematica推导出了复合静电－磁浸没透镜全部曲轴二级像差系数。作为实例，中针对轴上磁场和电场具有某种解析表达式的旋转对称的静电－磁浸没透镜系数，计算了它的曲轴高斯聚焦特性和二级像差，并给出了二级像差分布图形。     

微分代数在高阶复合几何像差—色像差分析中的应用

微分代数是计算机数值计算领域中的一种强有力的新型数学方法,它为任意高阶微分的计算提供了一种可达到机器精度的极为简便的手段。本根据微分代数的基本原理,研究了它在高阶复合几何像差－色像差分析计算中的应用,得到了系统的任意阶传递性质的微分代数表达,并具体给出了一至三阶复合几何像差－色像差所对应的微分代数系数。中还以一个轴上电位分布具有解析表达式的静电电子透镜为例,计算了它的一至三阶复合几何像差－色像差系数,并给出了一阶色差分布图形。     

用计算机全息方法改变激光束横模的研究

以圆对称高斯光束变换为十字光束为例，提出一种全息光学元件的设计理论和方法，推导出计算机制全息图的衍射方程，同时给出设计结果的计算机模拟验证方法，动用ＨＯＥ可以解决光束能量转换效率及能量重新分配问题。     

Holographic lens recorded on photopolymers: fabrication and study of the image quality

In recent years, holographic optical elements have been introduced in different applications such as high-density data storage, interconnections, spatial and temporal filters and three-dimensional displays. Simultaneously, more sensitive, efficient and durable holographic materials have been developed. Thus it is necessary to analyze the characteristics of these elements in the holographic materials developed. In this paper a method to obtain holographic lenses in a photopolymer is presented. In order to obtain, reconstruct and analyze these lenses, an optical device was designed. Once the holographic lenses are obtained, the device allows us to capture the images provided by these lenses. The imaging quality of these lenses was evaluated by means of the modulation transfer function (MTF) and the contrast. Lenses of different focal lengths were recorded. The holographic lenses obtained had high diffraction efficiency and temporal stability. Moreover, the resolution was greater than that of other lenses with the same diaphragm number.     

High efficiency panchromatic photopolymer recording material for holographic data storage systems

Studies carried out to gauge the potential of a metal-ion doped panchromatic photopolymer recording material for application in real-time holographic data storage is presented. The photopolymer films are spin coated on glass plates to ensure better surface uniformity. Volume holographic transmission gratings with peak diffraction efficiency of 80% could be stored in the photopolymer films of 100 μm thickness. An efficiency of 70% is achievable even for gratings recorded with exposure energy as low as 10 mJ/cm². A checkerboard pattern data page recorded in the photopolymer film using a defocused 4-f recording geometry could be reconstructed with good image quality. The experimental results illustrate the competency of the developed photopolymer for holographic data storage applications.     

二元光学二维激光扫描器设计

提出一种新型的二元光学二维纯位相型激光扫描器。首先利用计算全息图ＣＧＨ的设计方法设计出扫描器的初始结构参数，最后把其看成衍射光学元件（ＤＯＥ）对其进行成象质量优化。设计出一电视制式的二维扫描器，其扫描范围为±１２．５°×（±１０°）（水平×垂直），光斑尺寸约１ｍｒａｄ。     

Sorting of micron-sized particles using holographic optical Raman tweezers in aqueous medium

We have constructed a holographic optical tweezers system combined with Raman spectroscopy to sort trapped particles. Our software automatically moves the trapped objects to the measurement positions to obtain individual Raman signals from multiple trapped particles. We performed the sorting by comparing their spectra with the previously measured training dataset using the correlation coefficients. We used yeast cells and polystyrene beads as test particles. This study aims to show that biological particles can be separated using single cell analysis with combined holographic optical tweezers and Raman spectroscopy system.     

Interferometer for cold neutrons

Design and setup of an interferometer for cold and ultracold neutrons are described. As neutron optical components three holographically produced gratings are arranged in triple Laue geometry. The gratings are adjusted during their recording process in photosensitized polymer slabs once for ever. Employing this device we measured the coherence function of a cold neutron beam by means of interferometry.     

光刻镜头象质测试方法

提出了一种用于测量紫外光或深紫外光光斑位置的新方法，并将这种方法同传统的哈特曼检验法结合起来形成了一种测试光刻镜头象质的新方法。这种方法测量原理简单，测量精度高。     

Potential and limits of holographic reconstruction algorithms

For the purpose of ultrasonic nondestructive testing of materials, holography in connection with digital reconstruction algorithms has been proposed as a modern tool to extract crack sizes from ultrasonic scattering data. Defining the typical holographic reconstruction algorithm as the application of the scalar Kirchhoff diffraction theory to backward wave propagation, we demonstrate its general incapability of reconstructing equivalent sources, and hence, geometries of scattering bodies. Only the special case of a planar measurement recording surface, that is to say, a hologram plane, and a planar crack with perfectly rigid boundary conditions parallel to the hologram plane and perpendicular to the incident field yields a nearly perfect correlation between crack size and reconstructed image; the reconstruction algorithm is then referred to as the Rayleigh-Sommerfeld formula; it therefore represents the optimal case matched to that special geometrical situation and, hence, may be interpreted as a quasi-matched spatial filter. Using integral equation theory and physical optics, we compute synthetic holographic data for a linear cracklike scatterer for both plane and spherical wave incidence, the latter case simulating a synthetic aperture impulse echo situation, thus illustrating how the Rayleigh-Sommerfeld algorithm or its Fresnel approximation increasingly fail for cracks inclined to the hologram plane and excited nonperpendicularly. Furthermore, we point out how the physical data recording process may additionally influence the reconstruction accuracy, and, finally, guidelines for a careful and serious application of these holographic reconstruction algorithms are given. The theoretical results are supported by measurements.     

衍射微透镜列阵质量评价方法研究

根据实际工程需要 ,对用于萨克 -哈特曼波前传感器的二元衍射微透镜列阵衍射效率的评价方法进行了研究。导出了制作误差与衍射效率的关系式 ,研究了由测得的制作误差评估衍射效率的方法 ,并建立了一套测量系统。     

全息窄带带阻滤光片用于拉曼光谱测试仪

在测量物质的拉曼光谱时,存在着比拉曼散射光强103~06倍的瑞利散射光,会严重影响拉曼光谱信号的获取。为此,研制了半宽度分别为18nm(峰值波长532nm)和25nm(峰值波长633nm)、光学密度均大于4的重铬酸盐明胶全息窄带带阻滤光片,并将它们用于由平场光谱仪、CCD探测器和计算机控制系统等组成的小型拉曼光谱测试仪中,以滤除瑞利散射光,获得信噪比较高的拉曼光谱信号。对四氯化碳、乙醇以及丙酮等液体样品进行测量的结果表明,在拉曼光谱测试仪中采用该全息窄带带阻滤光片后,可快速测得待测样品的波数低至217cm-1的拉曼光谱。     

复合静电-磁浸没透镜的宽束曲轴聚焦性质及像差理论

研究了新型的复合静电 磁浸没透镜的曲光轴高斯电子光学性质及像差特性。应用宽束曲轴理论 ,导出了三维局部正交坐标系中的电子运动的中心轨迹方程和曲光轴的近轴轨迹方程 ;利用数学软件Mathematica推导出了复合静电 磁浸没透镜全部曲轴二级像差系数。作为实例 ,文中针对轴上磁场和电场具有某种解析表达式的旋转对称的静电 磁浸没透镜系数 ,计算了它的曲轴高斯聚焦特性和二级像差 ,并给出了二级像差分布图形