查询词典 lens formula

This paper is the discussing about the aperture -coefficients of the Zoom Lens, the formula for the calculating is: F=f/d where.

该论文是探讨变焦镜头的光圈系数，镜头的光圈系数的计算公式：F=f/D(其中：F为光圈系数，f 为镜头焦距，D为光圈开口直径)。

Objective To analyze the results of phacoemulsification cataract surgery in eyes that had refractive surgery and to compare the predictability of K value in Holladay Ⅱ formula of intraocular lens power calculation.

目的分析应用 HolladayⅡ公式计算角膜屈光手术后人工晶状体植入度数的准确性。

In this paper, the propagation and focus properties for several modes describing hollow beam are analyzed, and the focus properties for hollow gaussian mode are particularly discussed. Furthermore, a new mode, high-order Bessel-Gauss mode, is put forward to describe hollow beams. The results for high order Bessel-Gauss beams propagating through lens focusing system and free space are derived by terms of Collins integral formula.

本文分析了几种描述空心光束数学模型的传输特性和聚焦特性，着重讨论了描述非中空光束的数学模型的聚焦特性；同时提出了一种描述完全中空的空心光束的新模型――高阶贝赛耳高斯模型，并且运用Collins积分公式，分析了这种新模型的空心光束的传输特性和聚焦特性。

A detailed assessment of a projection lens design for Head-mounted projective displays in visual space is presented. The methods and the formula are given.

对一款折／衍混合投影式头盔物镜进行了"眼睛转动"时的视空间评价，给出了评价方法和计算公式。

Based on the defined effective Fresnel number of focused beams,the focusing of partially coherent beams through cylindrical aberrated lens was studied,and the simple formula of relative focal shift was derived.

华侨大学电子科学与技术系光学与光子学研究所，福建泉州 362021 华侨大学电子科学与技术系光学与光子学研究所，福建泉州 362021

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。