光阑

It is found that the bright points distributed regularly adjacent to main facular is spectral distribution on the focal plane of the array of lens when the laser irradiates a hexagonal aperture,rather than what is induced by stray light.

结果表明，主光斑附近规则分布的亮点并不是由杂散光引起的，而是激光辐照六边形光阑，在透镜组焦平面所成的频谱分布。

And also, we have done some researches on the Fresnel number of polygon slits, high efficient retroreflective film, the superluminal and/or subluminal velocities of beams in vacuum, the zero-field truncation technology, fractional Fourier transforms and so on.

同时，开展了多边形光阑菲涅耳数、高效逆向反光膜、真空中光束的超光速与亚光速现象、零场截取技术、分数付里叶变换等相关领域作了研究。

The results show that diffraction of different intensity, in other words, the radius of the circular aperture apparently influences on the distribution of the normalized light intensity of the diffracted beam and its propagation law.

结果表明：不同强度的衍射即圆形光阑半径的大小明显影响衍射光束的归一化强度分布及其传输变化规律。

The description of a plane wave diffracted by a circular aperture is directly started from the Maxwell's equations.

平面波经圆孔光阑衍射的表征是直接基于麦克斯韦方程组。

In chapter 3, characteristic paraments, focusing structure were discussed, the processing of double cell for phase conjugation was analyzed. Designing criteria of double cell phase conjugation mirror was given out. All phase aberrations could be compensated by using phase conjugation theoretically, but compensation is only effective to phase aberration of uniform polarizing state, it is not effective to aberration by thermally induced depolarization an diffractive effecting by aperture.

在第三章，我们讨论了SBS介质的特性参数，相位共轭镜的聚焦结构，分析了双池相位共轭镜的相互作用过程，给出了相位共轭镜的设计原则；从理论上讲相位共轭技术可以完全补偿热畸变以及因各种光学不均匀性造成的光束畸变，但是相位共轭技术只对偏振态均匀的相位畸变造成的光束畸变起补偿作用，而对由于热致双折射效应造成的退偏以及光束通过硬边光阑时的衍射效应造成的光束畸变无能为力。

Ultraviolet light is made to projected successively to sample template, phase template and fiber or successively to diaphragm, shutter, phase template and fiber.

它是使紫外光依次入射到取样模板、相位模板和光纤上，或依次入射到光阑、快门、相位模板和光纤上。

The distance between the phase template and the fiber so as to obtain the sample rate at two ends of fiber approach zero; light beam is scanned via sample template, diaphragm or shutter in uniform speed and projected to fiber to expose and form periodical sample structure.

调整相位模板和光纤间的距离，使光栅两端的取样率接近于零；再使光束匀速扫过取样模板或光阑、快门而入射到光纤上曝光形成光栅的周期性取样结构。

Essentially, the field stop of the eyepiece encompasses a linear field of view from the telescope.

从本质上讲，目镜的视场光阑与望远镜有线性关系。

In general, for each field stop size, choosing eyepieces with shorter focal lengths and larger apparent fields of view will allow you to see more detail and fainter stars.

通常，针对每一个尺寸的视场光阑，选择短焦距和大表现视场的目镜将允许你看见更多的细节和暗淡的星光。

To further fill in with incremental steps, add eyepieces with approximate field stop diameters of 28mm and 14mm.

为了填补中间的空余，可以增加的目镜视场光阑为28mm和14mm。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。