查询词典 optical distance

Nowadays more extended range is required while the precision of measurement tends to be in nanograde. Several non contact optical methods are introduced in brief and the absolute distance interferometry with diode laser is emphasized hereinto.

在分析现状和背景的基础上，大致归类了测量台阶高度的几种光学方法，着重介绍了其中绝对干涉方案的最新进展，从测量原理、测量精度以及量程等几方面比较了它们的优缺点。

Methods: The vision of 679 pilots were examined by circular optical visual chart, and the horizontal and vertical heterophoria, by the STEVEN rotary pris in 6 meters distance, small pupils and fundus, by routine method.

以环形视标视力表，测定697名飞行员视力。采用STEVEN旋转棱镜作6 m距离水平及垂直隐斜检查。常规小瞳孔眼底检查。

A lighting appliance with a reduced encumbrance for industrial environments, comprising a head ( 11 ), equipped with an upper support ( 10 ) for hooking the appliance to the ceiling of an industrial warehouse or building in general, and two reflectors which can be disassembled from the appliance structure, one ( 13 ) above or inside the head ( 11 ), with a complex faceted optical system, and one ( 12 ) lower or outside the head ( 11 ), with a segmented geometry; a vertical regulation system of the lamp ( 15 ) of the lighting appliance allows the illuminating engineering characteristics of the appliance to be varied, obtaining different photometric conditions according to the distance of the lamp ( 15 ) from the work surface.

一种用于工业环境的减小体积的照明设备，包括：头部(11)，该头部装备有将照明设备钩在工业仓库或普通建筑天花板上的上部支承件(10)；和两个可以从设备结构中拆开的反光器，一个反光器(13)位于头部(11)的上面或内部，具有复杂的有小平面的光学系统，一个反光器(12)位于头部(11)的下面或外部，有球缺的几何形状；照明设备的灯泡(15)的垂直调校系统使得设备的照明工程特性根据灯泡(15)离工作表面距离变化，以获得不同的光度条件。

Position of one object′s conjugate image plane varied when the distance between it and the optical system was changed.

当目标与光学系统的距离变化时，其共轭像面的位置也发生相应的变化，而摄像头的CCD是固定的，因此在CCD上得到的是模糊度不同的图像。

To use solid immersion lens is one of the practical methods to realize the near-field high-density optical data storage. But the storage system will work only on the condition that the distance between the bottom of the SIL and the surface of media is exactly controlled within the sub-wavelength scale.

采用固体浸没透镜的光存储方法是提高光存储密度的比较实用的近场光存储方法，而严格控制SIL下底面与光存储介质之间的亚波长级距离是此光存储系统正常工作的前提。

This article analysis the effects of canopy structure: cultivated density and canopy thickness, canopy azimuth angle and gradient, canopy height and interline distance, canopy stretch degree, leaf area coefficient, leaf area density; fruit photosynthesis characteristics: leaf optical characteristics required, changes in law of fruit Pn's season and day; the internal and external effects of photosynthesis; light interception and distribution, the paper puts forward some exiting problems and provides direction for future research.

本文通过对影响叶幕结构的因素：栽植密度与叶幕厚度、叶幕方位角和倾斜度、叶幕高度与行间距离、叶幕开张度、叶面积系数、叶面积密度；果树的光合特性：叶片的需光特性、果树净光合速率的季节和日变化规律；影响光合作用的内、外界因子；光能的截留和分配的分析，提出研究中存在的问题，为以后的研究提供方向。

Spatial interpolation methods and principles of marine optical data based on GIS is researched, including inverse distance weighted interpolation, ordinary Kriging spherical model and exponential model interpolation.

研究基于GIS的海洋光学调查数据空间插值方法及其原理，主要探讨了反距离加权插值法、普通克里格法的球体模型和指数模型算法。

In this paper, effects of one of the fibre nonlinearities, four-wave mixing, in long distance coherent multichannel optical fibre transmission are studied.

本文研究光纤非线性现象之一的四波混频对长距离相干多路光纤传输系统的影响。

Close-up performance of the Summicron-M is on the same level as the performance at infinity setting actually infinity is that distance where the incoming light rays are parallel to the optical axis.

近摄表现与无穷远时相当(事实上，无穷远处的光线是平行光轴入射的。对多数镜头而言，大约100倍焦距的物距时，入射光满足这一条件)。

In addition, the software about optical image system and some functional enhancement have been briefly introduced. The changes of the planar and spatial practical image point and ideal image point have been discussed when the vision field angle, object distance and range of refractive index have changed. Some summarizations have been put forward. Some results have been deduced and given qualitative explain.

并简单的介绍了由光学成像算法实现的软件以及对该算法的一些功能的增强从视场角、物距和折射率变化幅度三个方面讨论其分别发生变化时在平面上和空间中实际像点与理想像点的偏差的变化情况，并总结其变化规律，对其中的部分规律进行了简单的推倒和定性的说明。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐