查询词典 lens

The ratio of the focal length to the diameter of a lens system.

颅骨最大长度和最大宽度的比率。

All rays passing Through the lens have similar focal length.

所有的射线穿过晶体也有类似的焦距。

In order to accurately measure the focus of lens, the position of focal plane must be firstly determined.

而要精确测量焦距，必须先准确地检测出焦面的位置。

A photo detector was put on the focal plane of the lens to detect the light.

对C波段的波长进行了解调，给出了实验系统及相应结果分析。

If you don't want to spend the money to put a lens in shutter, focal plane Speed Graphics can be a very important part of your camera inventory.

如果你不想为了把透镜放入快门花费钱，焦点的平的速度制图法能是你的照相机财产目录的非常重要的部分。

The influence of the focal length in focal lens on the bottle radius and bottle length is discussed.

讨论了聚焦透镜的焦距f对径向暗域最大尺寸及轴上暗域长度的影响。

When a capillary tube, in whose inner hole an optical fiber has been fixed and whose axial deviation amount between an outer peripheral surface of the capillary tube and a core center of an end surface of the optical fiber is 1.5 mum or less, is inserted into the insertion portion of the thin tube and the end surface of the optical fiber is fixed at a position at which a distance of the end surface to a focal point position of the partially spherical lens becomes -40 mum or less, emission light has an emission light bend of 0.2 DEG or less with respect to the center axis of the thin tube.

当将光纤固定在内孔且外周面与光纤的端面的纤芯中心的轴偏移量在1.5μm以内的毛细管插入细管的插入部，并且将光纤的端面固定于部分球面透镜的焦点位置±40μm以内的距离的位置上时，出射光曲率为出射光相对细管中心轴在0.2°以内。

The merit of the invention are: 1 adopting free curved surface imaging method , three part reflection type Zernike polynomial free curved surface forms short focal distance bigger, relative apertures bigger fields of view angle imaging , rectifying optical aberration much better and its structure is simple; 2 adopting the reflection structure without optical lens, has removed the effect of various chromatic aberration , guarantee the imaging articulation; 3 adopt the design of short focal distance big fields of view angle, focal distance 8 - 15 mm, field of view angles 100 -135 degree, having 120 times multiplications under 250 mm imaging distance, having ultra-thin characteristic property; 4 adopting big relative apertures design ,the relative aperture is 2.0-2.4, having improved the illuminance of flat surface; 5 adopting image space telecentric imaging method , ensures that the image surface irradiance is homogeneous.

本发明的优点是：1采用自由曲面成像方法，三片反射式Zernike多项式自由曲面形成短焦距大相对孔径大视场角成像，更好地校正像差，结构简单；2采用无透镜形式的反射式结构，消除了各种色差影响，保证成像清晰度；3采用短焦距大视场角设计，焦距8～15mm，具有100～135度的视场角，在250mm成像距离下有120倍的放大倍数，具有超薄特性；4采用大相对孔径设计，相对孔径为2.0～2.4，提高像平面上的光照度；5采用像方远心成像方法，保证像面辐照度均匀。

Within the belt,folds,lens,structural foliation and small faults are developed and indicates the syn-collision contraction.

带内主要发育褶皱、透镜体、构造面理和小型断裂，反映同碰撞过程中的挤压变形。

"Fisheye:Of, relating to, or being a wide-angle photographic lens that covers an angle of about 180, producing a circular image with exaggerated foreshortening in the center and increasing distortion toward the periphery."

鱼眼镜头的：覆盖角度在180°左右、产生圆形图象且中央是夸张的使更向外围扭曲的透视图的广角摄影镜头的或与之有关的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。