共查询到19条相似文献,搜索用时 156 毫秒
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李四维王学新谢毅郭羽闫晓宇杨毓鑫张旭 《应用光学》2023,(4):868-873
针对红外光学系统透射比参数无法准确测量的问题,开展了红外光学系统光谱透射比测量和校准技术研究。通过对积分球法、大面积均匀源法等测量方法进行分析,研究构建了基于回返射法的红外光学系统光谱透射比校准装置,并建立了完整的光谱透射比量值溯源和量传链条。利用该装置实现了2μm~14μm波长范围的光谱透射比测量,对测量结果进行不确定度分析,结果为2%。相对于以往的透射比测量装置,该装置的测量结果具有更高的准确性和可靠性。 相似文献
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为了实现在车载观瞄系统原位不解体条件下快速、准确的性能检测,利用离轴反射式大口径平行光管搭建光学系统。基于TracePro实现对该光学系统光线追迹,对光斑质量和精度计算进行了研究。在分析离轴反射式平行光管性能和结构的基础上,设计了测试装置的光学系统;分析了该光学系统主要的误差来源及大小,结合误差合成理论计算其检测精度。结果表明:成像在该光学系统焦点处的光斑能量分布较为集中,距中心点0.6mm范围内的光斑能量占总能量的81.39%,该光学系统的检测精度能够达到2.9226″。满足了对车载观瞄系统光轴平行性原位检测时的精度要求,测试装置的架设、校准也较为容易。 相似文献
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研究了可见光系统星点检验方法在红外光学系统中的应用。以486DX2/66计算机为控制主宿机,完成对红外光学系统星点图像的数据采集、存储及处理,并在监视器上以不同的颜色或灰度显示像点形状,实现了对各种红外光学系统像点能量分布的测试,建立了一种红外光学系统成像质量的检验装置。 相似文献
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使用傅利叶线性系统变换理论对光学成象的评价,早在1940年就获得了很大的发展,而调制传递函数是现在评价光学系统和电子——光学系统的一个满意的标准。 相似文献
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电子光学系统是毫米波速调管长寿命和整管性能实现的关键,毫米波速调管零件尺寸较小,为了在Ka波段和W波段实现千瓦量级的输出功率,要求具有高的电子注通过率及低的阴极负荷。对Ka波段和W波段电子光学系统特性进行了分析,确定了Ka波段10 kW分布作用速调管和W波段1 kW分布作用速调管电子光学系统的设计方案,利用软件对电子枪和聚焦系统的结构进行计算,并采用CST仿真软件对设计的电子枪发射的电子注在聚焦磁场中的状态进行优化。设计出的Ka波段速调管电子光学系统,电子枪工作电压26 kV,发射电流2 A,互作用区长度30 mm,磁场强度大于0.6 T,流通达到100%。设计的W波段速调管电子光学系统,电子枪工作电压17 kV,电流0.65 A,互作用区长度20 mm,磁场大于0.9 T,流通达到100%。已制成Ka波段速调管和W波段速调管,设计的电子光学系统能够满足速调管工程化需求。 相似文献
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Erwann Bocquillon Vincent Freulon François D. Parmentier Jean‐Marc Berroir Bernard Plaçais Claire Wahl Jérome Rech Thibaut Jonckheere Thierry Martin Charles Grenier Dario Ferraro Pascal Degiovanni Gwendal Fève 《Annalen der Physik》2014,526(1-2):1-30
The edge channels of the quantum Hall effect provide one dimensional chiral and ballistic wires along which electrons can be guided in an optics‐like setup. Electronic propagation can then be analyzed using concepts and tools derived from optics. After a brief review of electron optics experiments performed using stationary current sources which continuously emit electrons in the conductor, this paper focuses on triggered sources, which can generate on‐demand a single particle state. It first outlines the electron optics formalism and its analogies and differences with photon optics and then turns to the presentation of single electron emitters and their characterization through the measurements of the average electrical current and its correlations. This is followed by a discussion of electron quantum optics experiments in the Hanbury‐Brown and Twiss geometry where two‐particle interferences occur. Finally, Coulomb interactions effects and their influence on single electron states are considered. 相似文献
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SU Zhiwei CHEN Qingchuan 《核工业西南物理研究院年报(英文版)》2005,(1):147-149
K9 glass is a common material of optics and micro system, with cheaper price and better processing function. With the development of the optical and micro system, the technique of manufacturing micron/nanometer dimensions microstructure and micro device on K9 glass has used in photoelectron, microwave and diffraction optics device et al The coarse surface of optics and microwave device can cause the light scattering and signal losing, and the function of device reduced. So the supersmooth surface plays an important role in optic and microwave device. 相似文献
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带状注速调管可以在高频段实现高功率微波输出,电子光学系统是带状注速调管的关键部件。阐述了Wiggler双平面聚焦理论,设计了新型椭圆形柱面阴极和椭圆形聚焦极结构,阴极曲率半径为17 mm,长轴10 mm,短轴4 mm;聚焦极长轴28.8 mm,短轴10.4 mm。采用这种结构可以直接产生椭圆形带状电子注,且阴极发射电流密度较为均匀。设计了周期长度为8 mm,总长度为108 mm,中间带有凹槽并可以实现双平面聚焦的Wiggler结构,模拟显示电子注填充因子在75%左右,通过率达到100%。设计了新型的菱形收集极结构,电子轨迹在收集极内发散均匀。 相似文献
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条纹相机(包括X射线条纹相机和可见光光学条纹相机)是一种高时空分辨的诊断设备,在激光惯性约束聚变(ICF)物理实验研究中具有非常重要的应用。介绍了当今国内外激光聚变领域获得广泛应用的两种主要类型条纹相机的技术性能以及各自的技术特点,它们分别采用了同轴电极双聚焦电子光学扫描变像管和双板电极电子光学扫描管。在技术指标方面,重点论述了条纹相机动态范围的判据,分析了激光聚变实验对条纹相机动态范围的需求,介绍了当今国际上高性能条纹相机动态范围指标的现状。文章也介绍了和条纹相机发展应用相关的几项重要技术进展,这些进展包括先进光时标、抗辐射加固记录系统和抑制相机背景噪声的阴极选通技术。 相似文献
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G. I. Fat’yanova 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(10):1468-1473
The peculiarities of the design of tiny elements of electron optics—electron lenses used in the microsystem electron-beam technique, and their difference from conventional electron lenses that are applied in modern electron-beam equipment have been considered. Lenses with a two-functional magnetic circuit are analyzed. The magnetic circuit in such lenses, along with its direct destination, serves simultaneously as an electrode to which necessary potentials are applied. A lens with a coil playing the role of an electrode is considered as well. This approach allows more compact location of elements of electronic optics in an electron-optical system and simultaneous implementation of new properties of tiny lenses. The problem of fabrication of the excitation coil in the form of an Archimedes spiral is studied. The possibilities of application of new materials (high-temperature conductors, solid electrolytes, ferrites, etc.) that could not be previously used due to the large sizes of the elements of conventional electron optics are analyzed. 相似文献
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《Journal of Electrostatics》2002,54(3-4):321-332
An electrostatic digital mirror device has been used to replace the lenslet array in a simple adaptive optics system. Clusters of binary pixels define the subapertures of the image plane and direct a small portion of the image onto a detector. The detector measures position shifts in the focused subaperture image caused by optical aberrations. Measurements on a digital mirror-based system and a similar lenslet-based system compare favorably to within a simple scaling factor. A subaperture system designed around a digital mirror device could aid in the development of a sequential subaperturing method that would replace the more complex schemes used in traditional adaptive optics. 相似文献
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神龙二号是一台三脉冲强流脉冲电子束直线感应加速器,就其多脉冲的电子束束参数的测量而言,基本要求是单个脉冲可分辨,进一步的要求是脉冲内时间可分辨。基于光学渡越辐射原理及瞬态发射度测量系统原理,发展了一种束斑与发散角可以分开测量的光学布局结构,结合多台高速分幅相机,成功研制了一套完整的多脉冲电子束束参数的测量系统,其特点是灵活的组合测量方式,全面满足了神龙二号复杂艰难的调试及参数测量工作要求。测量系统最高时间分辨测量能力达到约2 ns的水平,单个脉冲可以获得至少8个时间分辨的束参数测量结果。 相似文献