场曲

并通过实验验证了光纤传像元件对光学系统场曲的校正作用。四、分析了线阵CCD的驱动时序要求。

It is verified by an experiment that fiber image transmission components can correct field curvature of optic lens systems . ( 4 ) To analysis drive timing requirements of linear array CCD .

由设计实例可见，该系统在10×10mm~2扫描范围内，场曲仅为0.013μm。

A practical system has been designed , and the maximum field curvature within the 10 × 10mm2 deflection field is only 0.013 μ m.

由此得到了电子光学广义的Fraunhofer条件（即消除各向同性和各向异性彗差的条件），证明了在此条件下，象散和场曲取极值或稳定值。

Therefore the general electron optical Fraunhofer conditions for correcting isotropic and anisotropic coma are obtained . It is shown that under this condition , astigmatism and field curvature have extreme or stationary values .

一种极低场曲复合聚焦偏转系统的设计

Design of Extremely Low Field Curvature Combined Focusing and Deflection Systems

基于球坐标的三维静电场曲边三角形边界元法

Curve Triangular BEM in 3-D Electrostatic Fields Based on Spherical Coordinate Transforms

斜细高斯光束经光学系统传播的像散和场曲

Astigmatism and Field Curvature for propagation of Gaussian Beam Through Optical System

大视场光学系统的像面往往存在场曲。

There is always field curvature in image of large field optical systems .

场曲小于0.05mm，全视场畸变小于0.1%。

Field curvature was less than 0.05 mm , and the Full field distortion was less than 0.1 % .

完全消除场曲和象散在校正透镜和消象散器上所加信号强度的计算；

The calculation of the signal strengths applied in correction lenses and stigmators which completely cancel field curvature and stigmatism ;

将多项式近似逆滤波场曲复原方法应用于实验相机场曲照片图像的校正，主要解决了噪声抑制和场曲参量选取的问题。

The inverse filtering restoration approach with polynomial approximation is applied to correct the field-curve photos from an experimental digital camera .

本文讨论了动态修正的计算问题：包括场曲校正透镜和消象散器的工作原理；

In this paper the following numerical computation problems of dynamic correction are described : ( 1 ) the principle of correction lenses and stigmators ;

将该方法应用于镜头存在场曲的数码相机照片的修正，大量实验结果表明，修正后照片清晰基本上均匀一致。

The actual restoration results demonstrate that the restoration scheme makes the definition of a space-variant degraded photo roughly uniform in the entire image region .

从水平和垂直方向偏转象散和场曲的影响应相同这一要求出发，提出了一种优化设计方法。

In view of attaining minimum and equal deflection aberration on the horizontal and vertical sides of a square scanning area , a method of optimum design is proposed .

本文提出了一种用系统本身预偏转和主偏转象差相抵消来消除电子光学场曲的方法。

This paper proposes a method of eliminating the field curvature aberration in combined focusing and deflection systems , by means of canceling the pre-deflection aberration with the main-deflection aberration .

然后，从出瞳直径、出瞳距离、工作距离、调制传递函数、点列图、场曲和畸变等入手，进行了光学系统的优化设计。

Secondly , considering exit-pupil diameter , exit-pupil distance , working distance , MTF , spot diagram , field curvature , distortion and so on , optical system is optimized .

通过对比不同元件和不同荷载形式对光学系统传递函数以及场曲和畸变的影响，分析了飞行器仿真设备结构设计的优点和不足。

Through comparing the effect of different components and load forms on the image quality of optical system imaging , this thesis analyzes the advantage and disadvantage of Flight Motion Simulator .

探讨了光纤数码镜头设计的关键问题，利用光纤传像元件优良的表面形状加工性能，可辅助校正大视场光学系统的场曲像差，实现高的成像质量，而结构简洁紧凑。

Good surface shape processing performance of fiber image transmission components helps to correction of field curvature aberration of optical system to achieve high image quality with a simple and compact structure .

所论述的原理、方法适用于三维空间任意起伏地形条件下的重磁位场曲化平计算，可做上延拓计算，也可做下延拓计算。

The principle and the method discussed in the paper are suitable for analytical continuation of three-dimensional arbitrary topographic relief , which includes " upward continuation " and ' ' downward continuation ' ' .

详细的阐述了在偏心和倾斜影响下光学系统的三阶波像差特性，着重讨论了彗差、像散和场曲在整个视场中分布规律。

The behavior of third-order aberration in decentered and tilted optical systems are described in detail , focusing on distribution of the coma , astigmatism and field curvature in the entire field of view . 3 .

在电子束聚焦和偏转系统中动态修正方法（即用场曲校正透镜和消象散器来消除偏转场曲和象散）可以相当显著地减小系统的总象差和提高系统的电子光学性能。

In electron focusing and deflection systems the method of dynamic correction ( i.e. the application of field curvature correction lenses and stigmators ) can significantly reduce the overall aberration and greatly improve the optical properties of systems .

采用非球面技术设计的光学系统，可消除球差、慧差、像散、场曲，减少光能损失，从而获得高质量的图像效果和高品质的光学特性。

The optical system use the aspherical technology can eliminate spherical aberration , astigmatism , curvature of field and reduce the energy losing . Consequently , high-quality images and high-quality optical properties can be attained by using the aspherical optical components .

草地足球场兼曲棍球场曲棍球运动中用到的球。

Turfed soccer cum hockey pitch ball used in playing field hockey .

网球，马球和曲棍球。草地足球场兼曲棍球场

" Tennis , polo and field hockey . " turfed soccer cum hockey pitch

人们正自足球场地蜂涌而出。草地足球场兼曲棍球场

The crowds were pouring out of the football ground . turfed soccer cum hockey pitch

草地足球场兼曲棍球场羽毛球场。草地球场和柏油地球场均可。

Turfed soccer cum hockey pitch Badminton court . Use for both grass and hard court .

余弦模拉拔方棒速度场的曲面积分解法

The Solution of Surface Integral for the Velocity Field of Square Bar Drawing Through a Cosine Die

草地足球场兼曲棍球场

Turfed soccer cum hockey pitch

栅板（SAP）对平场显微物镜场曲的定量测试及其实验

The Quantitative Measuring Method of Field Curvature of a Microscopic Flat-field Objective by SAP and its Experimental Results

本文介绍了汽车试验场环形道各曲线段几何参数的设计方法。

In this paper , a design method of circuit road on automobile testing ground hasbeen developed , presenting geometrical parameters of each curve segment of the road .

引入场镜组校正场曲，成像质量较好。

The field curvature is emended by locale lense , the quality of the image is nice .