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成象特性     
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  imaging characteristics
     The imaging characteristics of a GRIN fiber lens with exponential variation of the constant-index surfaces are discussed based on the ray paths equations.
     本文根据光线轨迹方程,讨论一种等折射率面为指数型变化的梯度折射率纤维透镜的成象特性
短句来源
     The imaging characteristics of Selfoc lens are analysised in this paper and the method of constructing the thin equivalent system of Selfoc lens is also given, which introduces great convenience into both geometrical and analytic means to find the object-image relationship.
     本文分析了自聚焦透镜的成象特性,提出了用薄透镜系统等效自聚焦透镜的方法,这种方法给用几何作图法和解析法求解物象关系带来了很大方便。
短句来源
  image characteristics
     Image Characteristics of Reflecting Prisms in Large Angle Turning
     反射棱镜大角度转动成象特性
短句来源
  imaging properties
     Researches on Infrared and Laser Imaging Properties of Complex Targets and Background
     复杂目标和背景的红外与激光成象特性研究
短句来源
     IMPULSE RESPONSE TRANSFER FUNCTION AND THE IMAGING PROPERTIES OF THE PLANE-PERIODIC OBJECT IN THE GENERAL OPTICAL SYSTEM——THEORY AND EXPERIMENT INVESTIGATION
     脉冲响应函数与平面周期物体构成任意光学系统的成象特性研究——理论与实验
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     We consider the imaging properties of ellipsoid near the focus and of concentric spheric surface,, and appropriately combine it. An optical system having field diameter 50~ 70mm, N.
     采用椭球焦点附近的成象特性和适当的球面校正系统,可以得出视场直径50~70mm,N.
短句来源
     This dissertation develops the infrared and laser imaging properties of complex targets and oceanic background.
     本文主要研究复杂目标和海背景的红外与激光成象特性
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     Second order circular and flat field imaging properties of holographically concave gratings
     全息凹面光栅二阶圆场和平场成象特性
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更多       
  imaging property
     Basedg on Fourier optical principle, the imaging property of grating illuminated by expansion source is analysed in this paper. Hence an innovative grating imaging displacement sensor is designed.
     该文应用傅里叶光学原理对扩展光源照明下光栅的成象特性作了分析,并由此设计出一种新型的光栅成象型位移传感器。
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      imaging characteristics
    Because of its non-specific clinical presentation and neuroradiological imaging characteristics, intracranial neurosarcoidosis remains a very difficult diagnosis, particularly in the absence of systemic signs of the disease.
          
    Hepatic angiomyolipoma demonstrating similar imaging characteristics as hepatocellular carcinoma: One case report
          
    This article presents an illustrative case report and reviews the historical aspects, clinical and imaging characteristics, etiology, differential diagnosis, management, and prognosis of cerebral vasoconstriction syndromes.
          
    The purpose of this work is to investigate whether the dosimetric and imaging characteristics of radiosurgery treatment planning provide sufficient accuracy to allow efficacious therapy of functional disorders.
          
    Local failure represents the overwhelming pattern of relapse after SRT, regardless of the clinical or imaging characteristics of patients with recurrent tumor.
          
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      image characteristics
    The smoothing process adapts to image characteristics and is good at preserving local image structures.
          
    The influence of acousto-optical Bragg diffraction on image characteristics is investigated theoretically and experimentally.
          
    Comparison of image characteristics in projection photolithography
          
    Based on this study, the authors reported the levels of segments, insertion depth, anatomic structure identification, image characteristics and clinical application of TEE, and the advantages of biplane TEE are discussed.
          
    The end-members were derived from the image data on the basis of specific image characteristics.
          
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      imaging properties
    Features of the imaging properties of focused image holograms (FIHs) obtained by means of total internal reflectance holography using optical systems of the hologram-low-quality objective (LQO) type are considered.
          
    At both the theoretical and the practical level, Leonardo was only concerned with the burning properties of concave mirrors, not with their imaging properties.
          
    In order to investigate the imaging properties of ultrasound in intracavity investigation techniques, we have examined the imaging under different conditions in rigid hollow receptacles as well as in an isolated porcine urinary bladder.
          
    The imaging properties of 123I-16-iodo-9-hexadecenoic acid (123I-HA), a terminally iodinated 17-carbon atom fatty acid analogue, were compared with Thallium-201 (201Tl).
          
    We have already shown that myocardial imaging properties of radio-iodinated long-chain free fatty acids (123I-FFA) and thallium 201 (201Tl) are comparable in detecting areas of inadequate myocardial perfusion (van der Wall et al.
          
    更多          
      imaging property
    Study of the imaging property of a fluorescent confocal microscopy with a phase-only filter in an extended source
          
    As an illustration, the perfect imaging property of a slab where ε1 = -ε0 and μ1 = -μ0 is verified.
          
    The nonlinear effect of two-photon excitation on the imaging property of two-photon confocal microscopy has been analyzed by the two-photon fluorescence intensity transfer function derived in this paper.
          
    The imaging property of two-photon confocal microscopy is discussed in detail based on 3D-OTF.
          


    A periodic field formed with three or five lens elements can be used as an image-forming lens in ion-optics. Generally, it possesses much stronger focusing ability than a single lens element under the same voltage ratio. Periodic field lenses have been used as initial focusing systems of ion sources in some electrostatic accelerators, yet its image-forming characteristics have not been fully studied.

    由三个或五个透镜元素组成的周期场,可以作为离子透镜使离子束成象。通常它具有比单个透镜元素强得多的聚焦能力(在相同的电压比下)。这种周期场透镜曾用于静电加速器离子源初聚系统中,但它的成象特性尚未有详细的分析。 本文提出一种研究这类透镜特性的方法。将周期场看作由若干个透镜元素合成的组合透镜,然后以Ferraris特征行列式求它的基点表示式。作为普遍情况,以浸没透镜作为透镜元素,导得了三个和五个透镜元素的周期场透镜基点表示式。式中只包含透镜元素的基点参量和电极系统的几何参量。式子十分简洁,便于计算,并有足够的精确度。通过解析表示式中各个因子的分析,可以方便地掌握透镜的特性。 由短磁透镜组合的周期磁场是上述普遍情况的一个特例。 文中以等径小间隙双圆筒透镜为浸没透镜元素,对周期场透镜的特性用导得的基点表示式进行了计算和分析。

    This paper describes and analyses the imaging performance of high speed raster photography with two dimensional pulse functional array. The lenticular plate has been used in the optical system to get the point-array-image of the raster plate which corresponds to the object. The density distribution of the point-array-image was measured. The resolution of the raster image is relative to the pitch of the raster plate. The high speed raster photography can obtain the higher relative brightness and lower resolution...

    This paper describes and analyses the imaging performance of high speed raster photography with two dimensional pulse functional array. The lenticular plate has been used in the optical system to get the point-array-image of the raster plate which corresponds to the object. The density distribution of the point-array-image was measured. The resolution of the raster image is relative to the pitch of the raster plate. The high speed raster photography can obtain the higher relative brightness and lower resolution of image as compared with the conventional high speed photography. The frame interval is equal to the size of the image point. For conventional high speed photography, a frame interval must be larger than the height of frame. So that raster photography can reach high framing rate. By reducing the frame size of the raster image, one can increase the resolution of the image.

    本文叙述了网格高速摄影的成象特性,用二维脉冲序列函数进行了分析.把网格器件用于光学系统中,获得了图象点阵列照片.目标和阵列象是对应的.测量了底片上的图象点阵列的密度分布,指出了分辨率和网格节距的关系.网格高速摄影与普通高速摄影相比是降低了图象分辨率而提高了图象对比亮度.在光学系统中使用网格器件的作用是把一个具有连续轮廓的外界目标分割成网格点阵象,通过点阵象作相对移动,在同一张底片上就可以得到许多与目标相对应的图象,网格高速摄影就是利用这种点阵运动原理来实现的.

    Contrary to the normal way of electrostatic electron-optical system design,the process of inversed design,given image characteristics of a system,consists of three steps,first,to determine the electron trajectories;secondly,to solve the potential distribution,and thirdly,to calculate the structural and electrical parameters in order to fulfil the required image characteristics.In this paper,based on the Picht's reduced "paraxial" equation,the requirements that the electron trajectories and potential distribution...

    Contrary to the normal way of electrostatic electron-optical system design,the process of inversed design,given image characteristics of a system,consists of three steps,first,to determine the electron trajectories;secondly,to solve the potential distribution,and thirdly,to calculate the structural and electrical parameters in order to fulfil the required image characteristics.In this paper,based on the Picht's reduced "paraxial" equation,the requirements that the electron trajectories and potential distribution must realize for typical electrostatic focusing image system are discussed,and the relation between "paraxial" trajectories and potential distribution along axis is also derived.It is suggested in the paper that the polynomial as a mathematical model is used to simulate the electron trajectory,and some examples are shown.Finally,computer results as an example for such a design process are given.

    与通常的电子光学系统设计相反,电子光学逆设计是在给定的系统成象特性下,反求电子轨迹与电位分布,从而确定能实现所要求的成象特性的系统的结构参量与电参量。 本文由简正形式的近轴轨迹方程出发,探讨了典型静电成象系统的电子轨迹与电位分布所应满足的要求,导出了近轴轨迹与轴上电位分布之间的关系式。文中提出了用多项式为数学模型模拟电子轨迹,并通过电子计算机进行求解,最后给出了计算实例。

     
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