透镜

They have a focal length, and where an image is formed depends on a combination of the focal length and the distance between the object and the lens.

透镜有焦距，而影像形成的位置，取决于焦距及物体与透镜距离的组合。

These are called vertex focal distance because they are measured from the vertex of the lens surface to the lens focal point, The focal powers corresponding to them are the back and front vertex powers.

13从透镜的表面到焦点的距离被称为顶点焦距，是以透镜的前后顶点为起点测量的。与之相对应的屈光度称为前后顶点焦度。

Diffractive efficiency of Fresnel lens is important factor to evaluate the quality of Fresnel lens.

菲涅耳透镜的衍射效率是评价菲涅耳透镜质量的一个重要指标。

Lens space's fundamental group, homology and homeomorphism of lens space are studied based on the definitions.

我们可以从不同的角度对透镜空间给出 3 个图 1 透镜空间的构造过程不同的定义。

By using Zernike polynomials to describe the wavefront distortion of beams, the propagation properties of the flattened Gaussian beams, super Gaussian beams, Gaussian beams and plane waves passing through an aberrated lens or an aberrated annular lens are studied based on the generalized Huygens-Fresnel diffraction integral.

以广义惠更斯—菲涅尔衍射理论为基础，采用Zernike多项式描述像差光束畸变波前相位，研究了平顶高斯光束、超高斯光束、高斯光束以及平面波通过像差透镜和环状像差透镜的传输。

If the switch is shut, the pulse opts for particle manners: it goes one way o r the other at the half-silvered mirror.

如果开关关闭，那么脉冲就选择成为粒子，在半透镜那边来决定走向A线或者B线，因为半透镜的缘故各有50％的概率。

This paper analyzes extended hemispherical lens,which can be used in focal imaging.

这种焦面阵成像结构将集成天线阵贴附在透镜背面接收透镜聚焦的功率，消除了集成天线工作在毫米波频段时存在的表面波对天线性能的影响，具有尺寸紧凑、损耗小的特点。

At present the cell array lens is usually cylinder or hemispheroid whose fill-factor (the ratio of light area and total area ) can achieve about 90.7%, so we need higher fill-factor arrays sometimes such as in the compound eye simulation optical system.

由于传统的圆形孔径透镜阵列填充系数较小，而在模拟复眼光学系统中需要高填充系数的透镜阵列。

In solid immersion lens microscopy systems with high numerical aperture, there always exists the aberration produced by Fresnel effects at the interface between SIL and the sample.

在高数值孔径的固体浸没透镜显微系统中，固体浸没透镜界面与样品之间的菲涅耳效应将产生象差，这一象差可能导致样品成像质量的下降。

And a standard hyperhemisphere immersion lens with high refractive index is put behind the object lens to satisfy the receiving of a detector with smaller photosensitive surface.

弯月型负透镜在前，具有平衡像差和棱镜的偏向作用；物镜后放置高折射率标准超半球型浸没透镜，满足小光敏面探测器接收。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。