球差-使以不同孔径角穿过透镜(或从镜面上发射)的光线不能聚焦在轴上的同一点。
Spherical Aberration — causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis.
球差-使以不同孔径角穿过透镜（或从镜面上发射）的光线不能聚焦在轴上的同一点。
Spherical Aberration -- causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis.
在实际应用中，由于聚焦孔径角加大，观测系统范围也必须相应加大，否则经验公式失效。
When the formulas are applied, the scale of the observation system due to the large focus aperture Angle must be enlarged, or else the empirical formula will be invalid.
结果表明，影响偏移成像水平分辨率的主要参数是介质速度、地震子波主频和偏移处理的孔径角。
The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture Angle of migration processing.
以线性调频信号为例，揭示窄带相控阵在大孔径宽扫描角情况下不能有效发射宽带高分辨信号的实质。
The essence of the fact that wideband signal can not be effectively transmitted using narrowband phased array in scenarios with large aperture and scan Angle is given.
围绕光纤耦合效率相关的量：激光模式、发散角、数值孔径、焦斑直径、精密光纤耦合器等问题进行了讨论；
The quantity in relation to the coupling efficiency of an optical fiber:lasing mode, divergence angle, numerical aperture, focal diameter and precision optical fiber coupler are discussed.
本文寻求一种在扫描实孔径雷达中，利用方位信号处理获得优于天线波束宽度的角分辨力的途径。
This paper concentrates on the problem of finding a way to obtain angular resolutions better than the beam width of real aperture radars by means of azimuth signal processing.
利用推导的抗挤强度系数理论公式分析孔径、孔密及相位角的变化对其抗挤强度系数的影响，其结果为优化射孔设计提供了简便的方法。
The shot diameter, shot density and shot phasing related to the collapsing strength coefficient are analyzed, and the result is helpful to the perforation optimum design.
但是，基于移相器的普通相控阵天线在进行宽带宽角扫描时，由于渡越时间和孔径效应的影响，使信号的瞬时带宽受限。
However, the instantaneous bandwidth of signals is restricted for general phased array because of its transition time and aperture effect.
减小聚焦极孔径对大发散角的电子有影响，但对聚焦作用的影响不如改变电位明显。
Reduction of the focus hole diameter strongly affects the electrons with large emission angle but its influence on electron focusing is less markedly than the influence of the variations in potential.
根据星地激光通信的实际状况，对接收孔径的归一化到达角起伏频谱进行了讨论。
In this paper, we talk about the collection aperture's normalized arrival-of-angle fluctuation spectrum in Satellite-ground laser communication.
研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大；扫描激光光束的入射角等因素对回波强度也有一定的影响。
Research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in TV seeker optical system reduce the intensity of the "cat's eye" reflection.
由于孔径效应和孔径渡越时间的限制，传统的相控阵雷达难以在大扫描角下实现大瞬时带宽。
Due to the restriction of aperture effect and the aperture traverse delay, it is difficult for a conventional phased array radar to get wide instantaneous bandwidth under wide scan scope.
最后，以一次地震为例，给出了孔径随震中距、方位角、频率变化的三维图象。
At last, taking one earthquake as an example, this paper gives three dimension patterns of radius of the field with epicenter distance and azimuth as well as frequency.
方位角估计是合成孔径雷达（SAR）图像自动目标识别研究中的一个重要问题。
Azimuth estimation is very important in the field of Automatic Target Recognition(ATR) of Synthetic Aperture Radar(SAR) images.
提出了一种基于多方位角图像决策融合的合成孔径雷达(SAR)图像目标识别方法。
In this paper, new synthetic aperture radar (SAR) image target recognition approach based on multiple views decision fusion is presented.
在对临界角效应定性研究的基础上，提出了用阶梯光刻热熔法来扩展热熔型微透镜阵列的数值孔径范围。
Based on the study of the critical Angle effect, a new method named step heat-forming photoresist method to expand the N. A. range of microlens array is presents.
进一步根据角谱传递函数计算了不同样品的光子扫描隧道显微镜理论图像，分析了探针与样品的间距、探针孔径大小、照明光入射角等对光子扫描隧道显微镜成像的影响。
Based on ASTF the influence of such parameters as tip-sample distance, tip aperture diameter and the incident Angle of illuminating laser beam on PSTM image has been discussed.
数字相控阵雷达宽带宽角扫描存在波束指向偏差和孔径渡越问题，导致信噪比降低，脉压主瓣展宽，距离分辨率下降。
The wide-band digital array radar (WDAR), which accomplishes the transform between digital data and analog signal in the radar array, is the trend of the development of the phased array rader.
数字相控阵雷达宽带宽角扫描存在波束指向偏差和孔径渡越问题，导致信噪比降低，脉压主瓣展宽，距离分辨率下降。
The wide-band digital array radar (WDAR), which accomplishes the transform between digital data and analog signal in the radar array, is the trend of the development of the phased array rader.
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