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- Has two converging lens system; the objective and the eyepiece. 有两个会聚镜头系统;物镜和目镜。
- The periscope and the change of periscope depth caused by changed the interval between of two lens inverted image system are simply described. 对潜望镜及改变双透镜转像系统间的间隔来实现潜望高度的改变进行了简要说明,并对转像系统间隔变化对整个系统性能可能产生的影响,进行了分析及计算。
- The usually circular area in which the image is rendered by the lens system of an optical instrument. 视区光学仪器的透镜系统所能看到的通常是圆周的区域
- Conclusion The cataract extraction through nuclear delivery with two lens diallers is an effective and ecnomic method in cataract surgery. 结论采用双钩娩核白内障摘出是一种简便有效的白内障复明技术。
- Imagine that we have some sort of Lens system which forms an image of an extended object. 设想我们有某种透镜系统，它对一个扩展物体成象。
- Compound lens or lens system designed to be free of astigmatism and able to form approximately point images. 没有散光并且能够形成近似的图像的。
- The ratio of the focal length of a lens or lens system to the effective diameter of its aperture. F值物镜或物镜系统的焦距与入射光孔直径之比
- An achromatic lens system may consists of several cemented or separated groups of orown and flint glasses. 一个消色差的透镜系统可由若干个互相贴合的或互相分离的、由冕玻璃和火石玻璃组成的组元组成。
- The lens or lens system in a microscope or other optical instrument that first receives light rays from the object and forms the image. 物镜首先从物体上接收光线并形成影像的显微镜或其它光学仪器中的透镜或透镜系统。
- Even the simple trilobite has an eye (complete with its double lens system) that's considered an optical miracle by today's standards. 按照今天的标准，即使是简单的三叶虫，它的眼睛（完美的双镜头系统）也是一个光学奇迹。
- Most major brands therefore make two lens lines, sometimes so indicated (like Canon's "L" series glass), and sometimes just differentiated by price. This allows them to cater to both markets. 大多数相机制造商因此都有两个不同的镜头系列,有的在其镜头上注明镜头(象佳能的“”系列专业镜头,)是哪个系列的,有的生产商干脆什么也不说,通过镜头的价格来区分。这样他们就能兼顾不同的市场需求。
- Mostmajor brands therefore make two lens lines, sometimes so indicated(like Canon's "L" series glass), and sometimes just differentiated byprice. This allows them to cater to both markets. 大多数相机制造商因此都有两个不同的镜头系列，有的在其镜头上注明镜头（象佳能的“L”系列专业镜头，）是哪个系列的，有的生产商干脆什么也不说，通过镜头的价格来区分。这样他们就能兼顾不同的市场需求。
- The PMW-EX1R features a hand-held design, does not have an interchangeable lens system, and will be available in December 2009 with an MSRP of $7,790. 在PMW-EX1R功能手持设计，目前还没有更换镜头系统，并将于2009年12月与零售价的七七九零美元。
- To evaluate the application value of scanning laser angiography with a wide-field contact lens system in the diagnosis of choroidal melanoma. 评价广角激光扫描血管造影技术在脉络膜黑色素瘤诊断中的应用价值。
- The condenser is equipped with an iris diaphragm, a shutter controlled by a lever which is used to regulate the amount of light entering the lens system. 聚光镜装配有瞳孔膜，那是一个有贡杆控制的快门，用来调节进入镜头系统的光量。
- The tectonic-fluid processes are decoupled by interaction of deformation partitioning, tectonic pumping, hydrofracturing and rupture-healing in tectonic lens system. 构造透镜体系统中构造-流体作用是通过变形分解、构造泵吸、液压致裂、裂开-愈合相互有序作用而解耦的。
- In the scope of zoom lens, most of researches focus on traditional zoom lens system, which changes the effect focus by moving the lens along optical axis. 中文摘要在变焦镜头的领域中，大都著重于传统式的变焦系统，其变焦方式是让透镜沿著光轴移动而改变整体的有效焦距。
- The two systems of government are polar opposites. 这两种政体正好相反。
- The telephoto lens system consisted of only two pieces of optical elements made of FK1 glass has an equivalent optical performance to the traditional telephoto lens system made of five pieces of optical elements made of defferent kinds of glass. 给出了仅使用1种材料FK1、2片型的长焦物镜系统设计结构，并将此设计结果与传统的5片型、5种材料的纯折射长焦物镜的光学性能进行了比较。
- Color high-grade material: mainly copper, aluminum, stainless steel and other materials.Antifog a mirror lenses containing plane mirror.Magnifying glass two lenses! 高档化妆镜材质：主要采用铜、铝、不锈钢等材料.;镜面采用防雾镜片，内含平面镜
