查询词典 optical distance

The general condition for athermalizing an optical system when the object surface is at finite or infinite distance is deduced in this paper, and the principle and design method of employing a diffractive optical element to athermalize and achromatize an optical system with normalized T-C chart are expanded.

推导了物面位于有限远和无限远时，实现热补偿的通用条件；并阐述了利用归化T-C 图设计消热差和消色差的红外光学系统的原理和方法。

The general condition for athermalzing an optical system when the object surface is at finite or infinite distance is deduced in this paper, and the principle and design method of employing a diffractive optical element to athermalize and achromatize an optical system with normalized T-C chart are expounded.

本文推导了物面位于有限和无限距离时实现光学补偿的通用条件，论述了利用归化T-C图设计热补偿和消色差红外光学系统的原理和设计方法，给出了8-12μm波段内、焦距123mm、相对口径F/2.5在20-60℃温度范围内的折衍混合红外光学系统的设计结果和理论评价结果，所述的设计方法可方便地推广到前视红外系统中。

Product Instructions: Enhanced VMS series of optical image measuring instrument was an enhanced 2D optical image measuring instrument which bring out by our company. Using high-resolution color Sony CCD camera and the United States NAVITAR Zoom Lens and With our company's Manual version of self-developed measurement software MCINS .This tester have the basic measurement functions of point, line, circle, distance, angle etc .and multi-axis functions which are ableing to meet the basic needs of the secondary element measurement. In addition, measurement data can be input EXCEL, WORD, TXT or output the measurement graphics to the DXF document to make CAD designs.

增强型VMS系列光学影像测量仪，是我公司推出的一款增强型2D光学影像测量仪，采用高分辨率日本索尼彩色CCD摄像机和美国NAVITAR变焦物镜，采用我公司自主研发的MCINS手动版测量软件，具备基本的点、线、圆、距离、角度等基本测量功能及多坐标功能，能满足基本的二次元测量需求；此外测量数据可输入EXCEL、WORD、TXT中或者将测量图形输出至DXF文档做CAD设计。

The fiber receptacle is adapted to hold an optical fiber at a fixed distance from the optical element.

光纤插座适于将光纤保持在距光学元件固定距离处。

When a capillary tube, in whose inner hole an optical fiber has been fixed and whose axial deviation amount between an outer peripheral surface of the capillary tube and a core center of an end surface of the optical fiber is 1.5 mum or less, is inserted into the insertion portion of the thin tube and the end surface of the optical fiber is fixed at a position at which a distance of the end surface to a focal point position of the partially spherical lens becomes -40 mum or less, emission light has an emission light bend of 0.2 DEG or less with respect to the center axis of the thin tube.

当将光纤固定在内孔且外周面与光纤的端面的纤芯中心的轴偏移量在1.5μm以内的毛细管插入细管的插入部，并且将光纤的端面固定于部分球面透镜的焦点位置±40μm以内的距离的位置上时，出射光曲率为出射光相对细管中心轴在0.2°以内。

The longitudinal conjugated property of ideal optical system ;2. Starting from the principle of photograph formation by an ideal optical system , this paper derives the formulas of field depth and hyperfocal distance.

本文从理想光具组成像原理出发推导出景深和超焦距的公式，物理思想明确，并结合公式绘出了景深与有关参量的直观图，摄影者容易理解和掌握。

On the basis of comparison of several algorithms of the calculation of unstable resonator"s mode. Fast Fourier transform method is chosen in this paper. The model of multi-layer distribution of gain is established. Sampling granularity in real space used in FFT, quotient of guard band and distance between subsections are made certain respectively. The convergence criterion of root-mean-square of plural y which is the quotient of the optical field"s distributions separated by one pass is established. Under the circs of multi-kind of distribution of gain and different measurement of distortion, the output optical field distribution is calculated.

在比较了各种计算腔模方法的基础上，根据角谱传播理论，选择FFT算法，建立谐振腔内多层增益分布模型，分别确定了FFT算法的空间采样间隔、保护带系数和分段计算的距离，选取光场往返一次之比的均方根值收敛准则，计算多种增益分布、不同镜面变形时的谐振腔输出光场分布，同时计算该光场的远场分布和传输有限距离之后的分布。

Adjacent grooves in the first groove set are separated by a distance sufficient to define therebetween a structure defined by a first optical surface (142) on one side, a top surface (146) and a first non-optical surface (150) opposite the first optical surface.

第一沟槽组中的相邻沟槽相隔一段足以在两者之间限定由位于一侧上的第一光学表面（142）、一顶面（146）和与第一光学表面相对的第一非光学表面（150）所限定的结构的距离。

The Fresnel lens in the optical receptor spotlights the headlamp beams to form their image at the 1-meter distance between the optical receptor and headlamps. CMOS camera as an image sensor, takes the photos of their images, which are captured by VG-M201, The application of some digital image processing techniques to these images, such as edge-picking up、 least-square fitting-curve algorithm, is to calculate the offset position/angle of optical axis of the high beams and the nodical offset of the unsymmetrical facular light and shade cut-off line of the low beams.

系统的图像采集工作是利用受光箱中的菲涅耳透镜在1米的测量距离上聚合前照灯灯光，由CMOS摄像头作为图像传感器件，照入灯光远光光斑和非对称近光图像，由嵌入式处理器对捕获的图像运用边缘提取、最小二乘法拟合曲线等数字图像处理技术计算出远光主光轴偏移角度以及非对称近光光斑明暗截止线拐点的偏移，实现了前照灯近光非对称光斑的自动测量。

Based on the development of key techniques,such as fabrication of optical fiber probe and probe-sample distance nonoptical control, ete,we have built a scanning shear force near-field optical microscope ,which can be combined with an inverted optical microscope.

在发展光纤探针制备和探针与样品近场间距非光学控制等关键技术基础上，我们研制成能与倒置光学显微镜联合使用的扫描切变力/近场光学显微镜，并具有反射和透射等工作模式以及能在溶液环境中工作。

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