基于LabVIEW的光学现象模拟

以牛顿环干涉和夫琅禾费矩孔衍射实验为例介绍了在LabVIEW环境下实现光学现象模拟的具体方法和过程.表明基于LabVIEW软件可以方便的实现牛顿环干涉和矩孔衍射等光学现象的计算机模拟.     

模拟分析光的衍射与干涉

基于物理光学的惠更斯-菲涅耳原理及基尔霍夫积分公式,应用Matlab软件编程模拟了光的单缝衍射和双缝衍射(干涉),从而形象地给出了衍射和干涉的内在区别和联系,也为相关的光学教学设计提供了新思路.     

双缝干涉和衍射计算机数值模拟与演示

利用Matlab数值模拟了双缝干涉和衍射实验,利用具备交互功能的用户界面实现了实验参量连续调节,模拟出了不同情况下的实验现象,特别是干涉和衍射光谱呈现与实验相一致的渐变色.     

便携式双波长同步对比波动光学课堂演示的实现

本文设计自制了便携式波动光学演示仪.该演示仪采用红、绿双色半导体激光器作为光源,配备多种规格的干涉、衍射和偏振组件,可以演示杨氏双缝干涉、多缝干涉、单缝衍射、小孔衍射、一维和二维光栅衍射、偏振等波动光学的主要内容.仪器体积小巧,激光功率大,采用电池供电,这些优点使之便于携带,无需暗室而可在普通教室演示,双色平行光源可以同步对比不同波长的干涉、衍射效果,实现了波动光学理论内容与实验现象的同步课堂演示.     

光的干涉衍射综合实验仪

根据传统的光的干涉衍射实验装置存在的不足,研制出了光的干涉衍射综合实验仪．将光学元件放置在同一小型光学平台上,按照实验需要组合成相应仪器．该实验仪既可以用于光学演示实验,也可以作为光学专用的实验仪器。     

双光束干涉中偏振态分布的演示实验

光的干涉现象是波动过程的基本特征之一,是波动光学研究的主要内容.相干条件说明光波的偏振态对光的干涉效应有影响.为了让学生更好地理解光的干涉过程中偏振态的影响,本文设计了一种全息记录光路,利用一种对激发光偏振态敏感的偶氮染料样品,演示了样品经过不同偏振的两束特定波长写入激光作用后,可以观察到写入光和探测光的衍射现象.这些衍射现象说明样品中可以形成的不同类型的折射率光栅,而这些折射率光栅来源于样品表面不同偏振态的周期分布导致的染料分子的周期取向分布,从而形象地说明了光的干涉过程中相位差的重要性,有助于学生对光的干涉的深入理解.     

波动光学教材体系的探讨

目前国内外的光学教材中,波动光学部分的次序多是先干涉后衍射,近年来我校编写了先衍射后干涉的教材。并试用了多年.本文介绍我们的想法,以期抛砖引玉,引起大家讨论. 光栅装置涉及到多光束的干涉,然而由于每束光都是来自一个缝的衍射光,因而光栅的全名不是干涉而是衍射光栅.同样,人们只说晶体的X射线衍射,而不说X射线干涉.以上涉及的虽然只是一些光学现象的名称,那么为什么这样命名呢? 再让我们回顾确立光的波动性的历史.早在牛顿时代,格里马耳迪(1618-63)观察到当直棍被小光源照射时,根后的几何影区内会出现明暗相间的条纹,他把这种现象称…     

水波干涉衍射的演示与仿真实验设计研究

本文自主设计了一种水波干涉衍射的演示实验仪器，通过光影法进行增强，展示了水波干涉衍射的效果。本文还研究了振动频率、衍射缝宽等不同条件下的干涉衍射现象，并对该现象的原理进行了深入探讨。同时本文基于Matlab开发了一种可视化的水波干涉衍射虚拟仿真实验，具备图形化、直观性等优点。经过与演示实验现象的对比验证了仿真实验的合理性。仿真实验可以更好地应用于大学物理课堂演示。本研究成果可以促进物理学相关领域的研究和应用，对推动相关领域的发展具有重要的意义。     

基于Origin的波动光学实验仿真

以光的干涉、衍射实验为例,介绍利用Origin软件实现光学实验仿真的方法.该方法避免了复杂的编程,易学易用,实现过程简便.其逼真的仿真图样与光强分布曲线,为光学的理论分析与实验教学提供便利,可以引导学生开展探究性学习,加深对光学现象和规律的理解,从而提高教学质量.     

圆孔圆环夫琅禾费衍射实验的Matlab仿真设计

本文基于标量衍射理论,利用Matlab软件编程实现了对圆孔和圆环的夫琅禾费衍射的计算机仿真.这为数字化仿真现代光学实验和教学提供了一种极好的手段.     

机械波的衍射和干涉现象的MATLAB数值模拟

运用MATLAB模拟了机械波的衍射和干涉现象,通过形象直观的图形演示能够加深学生对波的衍射和干涉现象的理解,激发学生的学习兴趣,提高教学质量。     

在光学实验中开设计算全息实验的探讨

计算全息能很好地实现传统光学全息干涉衍射过程的数字化模拟,与传统实验相比,实验参数调整方便,现象直观。将计算全息引入到光学实验教学中,可以突破传统实验的诸多限制,拓宽学生的专业知识面,促进学生的综合实验技能培养。     

基于胶片输出仪的干涉衍射屏制作研究

探讨了用胶片输出仪制作干涉衍射屏的方法和实验过程,结果表明制作的干涉衍射屏能有效地用于光的干涉衍射现象的演示。     

Optical multilayer detection array for fast ultrasonic field mapping

An optical multilayer detection array for ultrasonic measurements is presented. The probe comprises a dielectric interference filter structure that is evaporated onto a glass plate. An incident acoustic pressure signal deforms the layer system, and the induced modulation of the optical reflectance is determined by a simple optical detection scheme. The principle of measurement is demonstrated by a line scan through the focus of a broadband transducer and can be applied to rapid two-dimensional characterization of ultrasonic fields. The high temporal and spatial resolution of the measurements is combined with high sensitivity and durability of the probe, and, in contrast with fiber-tip multilayer hydrophones, the multilayer detection array provides signals that are not influenced by acoustic resonances and diffraction phenomena.     

Characterization of an optical multilayer hydrophone with constant frequency response in the range from 1 to 75 MHz

The performance of an optical multilayer hydrophone for ultrasound measurements is investigated both in theoretical terms and experimentally. The optical measurement system comprises a thin high-finesse dielectric interference filter structure that is deposited onto a plane glass plate. An incident acoustic pressure wave deforms the layer system, and the induced variation of the optical reflectance is determined. Applying the concept of an optical off-axis detection scheme offers good sensitivity and a simple and low-cost setup. A primary interferometric calibration technique is applied to experimentally determine the pressure-voltage transfer function in the range from 1 to 75 MHz. Within the measurement uncertainty a constant transfer factor is obtained for the whole frequency range. Measurements of broadband ultrasound pulses are influenced neither by acoustic resonances of the very thin sensing element nor by diffraction phenomena that are known to cause waveform distortions in small probe hydrophone measurements. High temporal and spatial resolution is combined with high durability of the probe, which is why the optical multilayer hydrophone is well suited for use as a reference for secondary hydrophone calibration.     

Multi-Slit Diffraction of Evanescent Electromagnetic Waves

The well-known Fraunhofer multi-slit diffraction is described as the multi-slit interference modulated by the singleslit diffraction, namely the multiplication between the single-slit diffraction factor and the multi-slit interference factor. By considering the simplified argument we show that the multi-slit diffraction of evanescent waves which are in the near-field region also has the interference and diffraction effects, and that this two-fold effect can be expressed as the convolution of the diffraction factor and the interference factor. Our conclusion could be helpful to understand the contribution of evanescent waves to the optical responses of sub-wavelength structures such as slits and grooves.     

多缝衍射的计算机模拟与演示

利用一个多缝衍射模型模拟光和微观粒子的干涉衍射现象。该模型可演示光的双干涉、ｎ缝衍射及色散现象;也可演示微观粒子的单、双缝衍射,物质波的概率特性及粒子从量行为到经典行为的过渡。     

Computer-generated volume holograms fabricated by femtosecond laser micromachining

We define computer-generated volume holograms (CGVHs) as arbitrary 3D refractive index modulations designed to perform optical functions based on diffraction, scattering, and interference phenomena. CGVHs can differ dramatically from classical volume holograms in terms of coding possibilities, and from thin computer-generated holograms in terms of efficiency and selectivity. We propose an encoding technique for designing such holograms and demonstrate the concept by scanning focused femtosecond laser pulses to produce localized refractive index modifications in glass. These CGVHs show a significant increase in efficiency with thickness. Consequently, they are attractive for photonic integration with free-space and guided-wave devices, as well as for encoding spatial and temporal information.     

散射光干涉图样的一种计算方法

本文从波动光学出发,利用菲涅耳-基尔霍夫衍射公式研究了文献[1]中所描述的干涉现象,并导出了干涉图样的强度分布,得到了条纹极大值的位置,对干涉现象的物理图象作了说明。 关键词：