A 0.5-inch wide-angle lens

The methods for measuring lens focal length and spherical curvature radius at presentare summarized, and the principle of the collimated beam compensation method for measuring lens focal length and spherical curvature radius is introduced and it is indicated that the key of this metbod ischeck on the collimation of compensation beam.

概述目前透镜焦距及球面曲率半径的测量方法，介绍透镜焦距及球面曲率半径的准直光束补偿测量法的原理，指出该方法的关键是对补偿光束准直性的检测。

The Study of Measuring Convex lens Focal Distance with CCD;

用CCD测量凸透镜焦距实验的研究

Further study on thin-lens focal length measurement experiment;

再议对薄透镜焦距测定的进一步研究

Improvement on a Device in the Experiment of the Measurement of the Thin Lens Focallength;

“薄透镜焦距的测定”实验装置的改进

Research on Focal Depth in the Experiment of Thin Lens' Focal Length Measurement

薄透镜焦距测量实验中焦深问题的研究

Measurement for the Long Focus Length of Lens by Images of Moire Fringes

利用莫尔条纹的计算机图象测量长焦距透镜焦距

Experimental Study on Measuring the Focal Length of Lens Automatically on the Optical Bench;

光具座实现透镜焦距自动测量的实验研究

The Problem Existing in Measuring the Focal Length of Thin Lens;

测量薄透镜焦距中存在的问题及解决办法

Discussion on the Methods of Coaxal Adjustment of Determining the Focal Length of Thin Lens;

一种薄透镜焦距测定中共轴调节方法讨论

Error Analysis and Ways to Make fewer in Measuring Focal Distance of Convex Lens;

凸透镜焦距测量的误差分析和减小方法

How to Find the Position of the Image in the Experiment of Measuring the Foci of Thin Covex;

测薄透镜焦距实验中成象位置的确定方法

A Method for Measuring Thermal Lens Focal Length of End-Pumped Nd:GdVO_4 Crystals

一种测量端面抽运Nd-GdVO_4晶体热透镜焦距的方法

variable focal length (cylindrical) lens

变焦(距)(圆柱)透镜

manual zoom lens

(镜头)手控可变焦距透镜

rear-controlled zoom lens

背面调整变焦距透镜

short focal length (high aperture) lens

短焦距(大孔径)透镜

Measurement of optical surface and foci of long focal length lens by CGH

计算全息法测量长焦透镜面形和焦距

The focal length differs with the thickness of the lens

焦距长底随透镜的厚度而变化。

(physiology) the automatic adjustment in focal length of the lens of the eye.

（生理学）用眼的透镜来自动调节焦距。