Analysis of transform from self-defocusing to self-focusing of LN crystal based on coupling theory;
LN晶体自散焦到自聚焦转换的耦合理论分析
Influences of Compton scattering on the small-scale self-focusing in the gain medium;
增益介质中Compton散射对小尺度自聚焦的影响
Experimental and Theoretical Study of Self-focusing and Spot-splitting of the Double-circle Spot Laser Beam in Kerr-medium;
双环斑激光束在克尔介质中的自聚焦和光斑分裂效应(英文)
Design and implementation of optical auto-focus microscopy;
一种光学显微自动聚焦系统设计与实现
The implementation of step-motor drive and auto-focus based on FPGA;
基于FPGA的步进电机驱动及自动聚焦的实现
Study on the Auto-focusing Technology of Digital Image and Realization for an Auto-focusing System;
数字图像自动聚焦技术研究及系统实现
autofocus zoom lens
自动聚焦变焦距镜头
auto iris zoom lens
自动光圈变焦距镜头
manual zoom lens
(镜头)手控可变焦距透镜
long focus lens
长焦距（望远）镜头
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
For different focus lenses,we realize auto-measuring by focusing.
对于不同焦距的镜头，采用对焦的方法实现自动测量。
Focal length: The distance between the centre of a lens and its principal focus.
焦距:镜头中心与其主焦点的距离。
Auto-focus: The automatic adjustment of the lens distance to give a sharp image on the film.
自动对焦:自动调节镜头的距离，使菲林得到清晰的影像。
Don't forget to focus the lens.
别忘了调节镜头的焦距。
the ratio of the focal length to the diameter of a (camera) lens system.
相机镜头直径焦距比。
This is a long focus lens.
这是个长焦距镜头。
macro teleconverter
增距式微距附加镜﹝使标准镜头变成微距而保留最近封焦距离﹞
(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。
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快速变焦距手术显微镜
rear-controlled zoom lens
背面调整变焦距透镜
best image plane of zoom lens
变焦距物镜的最佳像面
image plane displacement of zoom lens
变焦距物镜像面位移
zoom stereomicroscope
快速变焦距立体显微镜