干涉测量的误差分析与并联机床的准确度测量

对雷尼绍激光干涉仪的线性测量原理进行了详细探讨,分析了干涉仪在线性测量中的主要影响因素和误差诱因;作出了线性测量的准直误差特性曲线和阿贝误差特性曲面,并利用最小二乘法拟合得到了干涉仪准直测量误差的数学模型和沿u、v方向离散的阿贝误差特性曲线方程;给出了一种建立误差数学模型的方法.采用激光干涉仪检测了并联数控机床直线轴的运动准确度,并提出了一种适合于并联机床直线轴定位准确度测量的干涉测量方法.     

一种用于动态测量的干涉方法

介绍一种在大型空间内精密测量三座标的干涉方法。用这种方法，能跟踪测量作空间曲线运动的目标。提出方法的主要理论和设计中必须遵循的一些原则。     

激光高度表与干涉雷达数据融合在高度测量中的应用

雷达干涉仪和激光高度表广泛应用于地面高度测量。本文首先利用雷达干涉仪确定地面高度，然后再融合激光高度表数据改进雷达测量结果。数据测量结果表明，与仅使用雷达干涉仪测得的数据相比，数据融合获得的高度测量数据更为精确。     

利用等厚干涉测量钢丝的杨氏模量

测量杨氏模量常采用光杠杆法进行测量。而利用等厚干涉的方法可以比光杠杆法更精确地测出钢丝形变的变化量。目前利用等厚干涉测量杨氏模量的实验中多需借助显微镜进行观察及使用电脑对图像进行处理。本文提及的实验方法既可以用电脑进行图像处理,也可以直接用肉眼观察条纹的变化,使实验变得简单易行且精度也比较高,并能满足不同层次的数据处理的需要,可以作为一项综合性实验纳入大学物理实验中。     

在迈氏仪上用白光干涉测量的方法

在迈氏仪上用白光干涉测量的方法陶振英（锦州师范学院物理系）本文提出了在迈克尔逊于涉仪上，使用白光作光源发生干涉形成的彩虹图象，测量某些介质厚度或折射率的新方法．它比用钠光作光源的情况下，更具有原理简单，实验方便，测量结果精确的优点．一、白光于涉彩虹图...     

一种新型多波长绝对距离干涉测量系统的研究

介绍了一种新型多波长绝对距离干涉测量系统。系统采用633nm的双纵模He-Ne激光器和629nm的He-Ne激光器,组成三级合成波长链对较大距离进行精密测量,并作了误差分析。系统采用高稳定度的声光晶体对各波长分别进行偏频,再用外差探测法测量出光束通过参考光路和测量光路后的位相差。简要介绍了629nm的He-Ne激光器的设计方案。     

自参考激光剪切干涉法测量透镜焦距的实验研究

本文在改进的激光平板剪切干涉法基础上,提出了测量透镜焦距的一种新的实验方案。此方案根据透镜节点特性,以两组干涉条纹的平行作为判据,测量过程简便且精度较高。     

干涉法线胀系数测量实验装置研究与应用

本文介绍了利用迈克耳逊干涉仪构造的干涉法线胀系数测量实验装置,并通过实验应用过程阐述了研究该实验装置的重要性及现实意义。     

从平面波的线性干涉到涡旋光的角向干涉

依托中学生“英才计划”课题,以光场调控技术为选题,开展了从平面波线性干涉到涡旋光角向干涉演化过程的实验教学.从理论上模拟了涡旋光束与平面波的相干叠加,通过数值分析确认了拓扑荷数与干涉条纹的关系.实验上利用螺旋相位板制备涡旋光束,并采用马赫-曾德尔干涉法观测光强分布图.结果表明：涡旋光束与平面波的相干叠加,可以视为在线性干涉图样中移入与拓扑荷数相关的叉型条纹;而具有相反拓扑荷数的涡旋光束的角向干涉图样,则呈现与拓扑荷数相关的角向干涉条纹.     

利用激光干涉测量透明薄片厚度

本文主要介绍利用激光干涉来测量透明薄片厚度的原理。     

High sensitivity micro-displacement homodyne interferometry北大核心CSCD

Interferometry is widely used in nano-scale micro-topography measurement. In order to improve its accuracy and sensitivity, a high-sensitivity homodyne interferometry based on white light interference and laser secondary interference was proposed. A high-sensitivity homodyne interferometry system was designed, and the zero point of the laser secondary interference was used to locate the dark striation of white light interference, so that it could reach the maximum slope when optical path difference was zero. The signals of white light and laser were analyzed by using the wave principle and intensity formula of interference fringes, and a sensitivity calculation method based on the combination of white light and laser interference signal was proposed. The system and its sensitivity were simulated. Finally, the optical path was built, and the white light interference fringes were adjusted to the dark striations position, so as to locate the zero position of laser secondary interference and carry out the data acquisition. It is showed that the sensitivity of the measurement method is at least 1 832 times higher than that of the laser secondary interference, and the corresponding measurement uncertainty is only ±0.288 7 mV. The measurement system can effectively solve the problem of large amount of calculation in traditional interferometry, and has high sensitivity, stability and reliability. Copyright ©2022 Journal of Applied Optics. All rights reserved.     

A New Development of a Single Mode Laser Interferometer

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用于原子干涉仪实验的锂原子的塞曼减速与磁光囚禁

为了制备适于原子干涉仪实验的低温锂原子样品,开展了锂原子的塞曼减速及与磁光阱囚禁相关的实验研究.设计并实现了一种结构紧凑的腔体内冷式多级线圈叠加的塞曼减速器,将速度小于600 m/s的7Li原子减速到60 m/s,磁光阱装载速率为5×108/s,囚禁原子数目1×109个,原子团的最低温度约为220±30μK.研究了光学黏胶中7Li原子的寿命与囚禁光频率失谐量的关系.这些结果为进一步开展7Li原子亚多普勒冷却、光势阱蒸发冷却以及原子干涉仪实验奠定了基础.     

Optical interferometry method for the study of density variation in the nanosecond pulsed Nd:YAG laser interaction with aluminum

An interferometer-based technique has been used to determine the change in the refractive index induced by a Q-switched Nd–YAG laser (λ=532 nm and pulse duration 6 ns) on an aluminum target under atmospheric air pressure. The average density changes in front of the target irradiated by two laser pulse energy were observed for different focusing conditions. An Abel inversion technique is also presented for calculating three-dimensional density distributions in cylindrical coordinates.     

Direct ultrafast laser micro-structuring of materials using programmable beam shaping

Using active and programmable focal-spot shaping, we demonstrate direct femtosecond laser micro-structuring of materials. Surface marking as well as drilling with user-defined geometrical shapes of small dimensions (20 μm) are performed, without moving the laser beam nor the material target.     

利用x射线激光干涉诊断等离子体电子密度

x射线激光探针干涉方法是诊断高温高密度激光等离子体电子密度等信息的重要工具.利用神光Ⅱ装置输出激光驱动的类镍-银x射线激光作为探针，成功地进行了马赫-曾德尔干涉法诊断实验，获得了清晰的包含等离子体信息的动态干涉条纹图像，并据此给出了待测C8H8等离子体临界面附近电子密度的空间分布. 关键词： 等离子体电子密度诊断 x射线激光 马赫-曾德尔干涉仪     

自组建激光干涉仪测量平行板楔角

在光学实验平台上组建激光干涉仪,给出了测量微小楔角的原理和测量方法,导出了测量公式并进行了实际测量.     

傅里叶变换干涉仪激光信号处理电路的分析

激光信号处理电路是傅里叶变换干涉仪的重要组成部分,为提高干涉仪控制器的控制精度,在分析干涉仪工作特点的基础上设计了激光信号处理电路,并着重分析了四阶Besell带通滤波器的误差传递路径,及各噪声对信号质量的影响,从而为低噪声电路设计提供一定的理论基础,具有参考作用.最后,半实物仿真结果表明所设计的激光信号处理电路精度达到0.01％,从而验证了所设计电路的合理性.     

High-Resolution Reflectometry by Optical Multidigitized Coherence

We propose and confirm a novel technique of optical frequency domain reflectometry based on multidigitized coherence using a multimode laser. The proposed system can easily provide the potential for high resolution on the order of 10 μm without scanning frequencies as in frequency domain reflectometers of either continuous or stepwise sweep. The theoretical approach agrees well with the experimental results demonstrated using a commercially available multimode laser diode.