孔径

A ring coded aperture microscope for high resolution imaging of high-energy Xrays .

编码孔径成像系统中的点扩散函数。

An Iterative Algorithm of Multi-Aperture Transformation and Connection Technique in Cylindrical Coordinates .

圆柱坐标系下的多孔径扫描拼接技术的迭代方法。

A compound camera lens with a relatively high aperture .

带有相对高孔径的照相机复合镜头。

The design principle of the laser receiver with wide FOV for the laser command guidance and laser-beam riding guidance is introduced. A mathematic model of receiving light field is presented. The formula for the viewing angle of the detecting optical system was derived according to the diffraction light field of the oblique incidence parallel light. Taking a detecting optical system with the collecting objective for example, the design characteristic that the receiving optical system needs not only an extra large relative aperture but also an unvignetting receiving performance is discussed on the premise of meeting the requirement of 1064nm WFOV laser receiver.

介绍激光指令制导和激光驾束制导的大视场激光接收机的设计原理，给出接收光场的数学模型，由斜入射平行光的衍射光场推出探测光学系统的视场角公式，根据1064nm大视场激光接收机技术要求，以聚光物镜型探测光学系统为例，探讨接收光学系统既须具备特大相对孔径，又须具备无晕接收性能的设计特点，采用窄带干涉滤光镜进行光学滤波降噪。

In addition, a dedicated UHF synthetic aperture radar will image under trees.

此外，专门的UHF合成孔径雷达可以形成树叶下的图像。

Here the diffractive lens – Fresnel lens is used because the Fresnel lens has several advantages such as much larger aperture, thin and light.

在这里，所采用的是绕射式的Fresnel透镜，因为Fresnel透镜有孔径大薄和轻的优点。

With the increasing application of ISAR in military filed, it is necessary to work out efficient countermeasures.

逆合成孔径雷达在军事领域的应用越来越广泛，研究对其有效的干扰方法非常必要。

Range alignment is the basis and the key step of ISAR imaging.

包络对齐是逆合成孔径雷达成像的基础和关键步骤。

The original technology is based on the far-field optical but all of them are restricted by Rayleigh diffraction limit.In order to break optical diffraction limit restrictions, people improve recording density in three ways:(1) shorten wavelength of light,(2)increase numerical aperture of the lens N.A.

不过上述储存方式所采用的记录技术皆是在远场光学的领域内，在远场光学的绕射极限下，要持续提升记录密度的方法有三种；(1)缩小光源波长(2)提高透镜的数值孔径

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了