Annular flash lamps are presently indispensable instruments for medical photography,they are usually used in combination with micro-distance lens for micro-distance photography,e.
摄影技术在医学领域中普遍应用,环形闪光灯是不可缺少的医学摄影器材,通常配以微距镜头进行微距摄影,主要适合:腔内摄影、手术摄影、标本摄影等。
All the parameters of the zoom system are achieved with mathematic software,which solves a nonlinear equation group set up with a ray-transmission matrix of the zoom lens,based on the theory of the matrix optics.
传统上,在设计变焦距镜头时都要利用高斯光学求解变焦距的各组元焦距、组间隔。
Zoom lens has increasing applications for its inherent properties.
变焦距镜头由于其固有特点而得到越来越广泛的应用 ,目前 ,连续变焦的变焦距镜头普遍采用机械补偿型光学结构 ,其中的特定光学透镜组通过凸轮的驱动沿光轴连续移动 ,从而实现连续变焦 ,其可变组元数大多为二组或更多。
The design of zoom lens control system based on TMS320LF2407A is introduced in this paper.
文中介绍以DSP芯片TMS320LF2407A为核心的连续变焦镜头控制系统的设计,主要包括变焦距镜头的变焦原理、控制系统硬件电路的构成、电机控制电路的设计以及软件结构。
A novel optimized computation method for designing the Gauss optics parameter of zoom lenses is presented and discussed, including optical compensating method with moving of many groups of lenses by using Chebyshev polynomials and mechanical compensating method with many zoom formations by using nonlinear least square method.
突破了对像面漂移量的有理函数计算传统 ,考虑到组元运动曲线的间断性 ,给出了变焦距镜头高斯光学全新的最优化设计方法 ,借助于切比雪夫多项式 ,做到了任意组元联合直线运动的光学补偿 ,以及实现了简便的和有效的任意组元任意变焦方式的机械补偿。
Microlens: A term used by some manufacturers to describe their macro lenses.
微摄镜头:一些相机制造商用这个名词描述它的微距镜头。
Macro lens: A lens which focuses on close subjects without the aid of close-up devices such as extension tubes or close-up lenses.
微距镜头:不需收近装置，如外延管，近镜等而把很近距离的物体对焦的镜头。
Most macro lenses can produce an image which is half life size on the film.
多数微距镜头可以产生实物一半大小的影像。
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﹞
a telephoto lens
远距照相镜头, 摄远镜头
long focus lens
长焦距（望远）镜头
manual zoom lens
(镜头)手控可变焦距透镜
Expanding the Microshot Function of Digital Cameras by Using Enlargers;
用放大机镜头拓展数码相机的微距功能
flange focal distance
镜座距，指镜头座与菲林平面的距离
Don't forget to focus the lens.
别忘了调节镜头的焦距。
autofocus zoom lens
自动聚焦变焦距镜头
the ratio of the focal length to the diameter of a (camera) lens system.
相机镜头直径焦距比。
auto iris zoom lens
自动光圈变焦距镜头
This is a long focus lens.
这是个长焦距镜头。
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快速变焦距手术显微镜
zoom stereomicroscope
快速变焦距立体显微镜
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。
back focal distance
【光】后焦距﹝指镜头与菲林间的距离﹞