In order to improve radiation from waveguide TM01 mode, plate lens is laid at aperture plane of conical horn, phasic difference of 180 degree is produced along orthogonal fields for the acceleration of wave between plates.
为了改善圆波导TM01模的辐射特性，在圆锥喇叭口径处加平行板透镜，利用平行板的加速特性使正交方向的场产生180°的相位差。
Using optical imaging method, we successfully fabricate photorefractive phase mask and phase components (such as phase zone plate, phase Dammann grating, lens array, waveguide array and so on) in LiNbO3: Fe crystal for the first time.
首次利用光折变效应，通过成像方法在掺铁铌酸锂晶体中成功地实时制作了光折变位相图和位相元件（位相波带片、达曼光栅、透镜阵列、阵列波导等）。
Fittings series lasers have: a dedicated optical laser lens (spherical and non-spherical), laser diode driver circuit boards and with TTL modulation drive plate, laser-specific power supply (with a soft-start and reverse polarity protection).
激光器配件系列有：激光专用光学透镜、激光二极管驱动电路板及带TTL调制驱动板、激光器专用电源（具有软启动及极性反接保护）。
Design of objective lens with reflective spherical fresnel zone plate.
应用反射型球面菲涅耳波带片的成像物镜设计。
The metal winding filling piece, in the belt the outer ring winding filling piece, the flexible graphite seal ring, the octagonal pad, the ellipse planchet, the tooth profile pad, nearby the lens pad, the excel in package the filling piece, the asbestos rubber plate, can produce φ15-φ4000 the specification product
我们厂的主导产品有：金属缠绕垫片、带内外环缠绕垫片、柔性石墨填料环、八角垫、椭圆垫、齿形垫、透镜垫、高强包边垫片、石棉橡胶板、高强石墨复合板、蝶阀多层次密封材料、特制密封件产品，能够生产φ15-φ4000规格的产品。
Each digital micromirror can be rapid speed changes, from the angle of the light or refringence, or refringence to go to the group, and then focused by the lens to the plate, resulting in a very subtle agreed on a light 0/1 digital conversion.
每一个数字微镜是可以以极迟的速率保持角度的，堵住差别的角度，不兵平或者不正射行，或者不正射到聚焦镜片组再到版材，从而极为精致的告竣了平的0/1数字变换。
Based on the scheme, we have fabricated successfully many phase elements in LiNbO3: Fe, such as photorefractive phase mask, phasing zone plate, lens array, Daman grating and array waveguides, ring and elliptic waveguides and so on.
按照此方案，我们在LiNbO3：Fe晶体中成功制作了光折变位相图、相位型波带片、透镜阵列、达曼光栅及阵列波导、圆形及椭圆形波导等位相元件。
Beijing Fangwei Electronics Co., Ltd., the main research and development products: anti-theft security system alarm system host infrared detector monitoring system hard drive video camera audio and video wireless transmitter video compression card monitoring equipment, in particular to promote the focal length of 200 mm lens color infrared waterproof perturbation As the network of video cameras network server wireless video transmitters pc hard drive digital video recorders embedded in digital audio and video compression DVR card also known as compression card infrared detectors monitor the infrared detectors on the radio for highway camera: The road monitoring Minimum illumination light curb high-definition color video camera license plate identification camera blackout probe.
北京方伟电子有限公司，主要研发产品有：安防系统防盗系统报警主机红外探测器监控系统硬盘录象摄象机无线音视频发射器视频压缩卡监控设备特别推介焦距200mm镜头彩色红外线防水摄象机网络摄象机网络视频服务器无线视频发射器 pc式数字硬盘录象机嵌入数字硬盘录像机音视频压缩卡又称监控压缩卡红外线探测器红外线对射探测器高速公路专用摄象机：道路监控强光抑制高解析低照度车牌识辨摄像机彩色摄象机停电探测器。
Products are widely used in plastic products, metal processing, decorative plates, electrical and electronic products and other industries, such as: plastic lens, cold rolling board, circuit boards of glass lenses, plastic injection molding parts, nameplate production, liquid crystal displays, copper, aluminum, stainless steel plate, speaker panels, PC boards, advanced materials such as titanium plate surface protection, the protection of your product in order to avoid the transport or production and use of the process of wiping the surface of damaged flower.
产品广泛应用于塑胶制品、五金加工、装饰板材、电子电器等行业产品，例如：塑胶镜片、冷扎板、电路板玻璃镜片、塑胶射出成形件、铭牌制作、液晶显示器、铜片、铝片、不锈钢板、、音箱板、PC板、钛金板等高级材料表面保护，保护你的产品以免在运输或生产及使用过程当中的表面受损擦花。
The check of mutation of video camera lens that offerred a kind to be based on BP nerve network newly calculates a standard, this algorithm chooses pattern plate to match poor cent and histogram 2 times 2 times to differ cent to serve as a feature, those who use nerve network from organization, self-study mutation of camera lens of implementation of ability of be used to detects, detect in order to flash next will raise detected dependability.
提出了一种新的基于BP神经网络的视频镜头突变检测算法，该算法选取模板匹配二次差分和直方图二次差分作为特征，利用神经网络的自组织、自学习能力实现镜头突变检测，然后以闪光检测来提高检测的可靠性。
Fresnel Zone Plate antenna with high performance on wideband, lightweight, simple feed system and easy conformability, have been regarded as a replacement of the lens antenna in the millimeterwave imaging or used as the receiving element in microwave mobile communications.
菲涅尔平板天线由于其具有宽频带、重量轻、馈电简单和易于共形等优点，可替代透镜天线用于毫米波成像或用作微波移动通信中的接收天线单元等。
The difference from each position was called CCD plate diviation. However this method is hardly used in reality because it mainly depends on manual skills and experience. It is preferred in this paper that the piecing lens are measured by an image process.
本文提出了采用图像处理法对拼接棱镜进行测量，也就是说使用计算机对图像的质量进行判别，用光栅传感器对位置进行测量，最后得出各CCD器件的共面偏差，这种方法是作者首次提出，在国内还没有人进行过研究。
Shutter＝a mechanical device of a camera that by opening and closing allows light coming through the lens to expose a plate or film.
遮光器，照相机上的一种机械装置，通过开与闭让光线从镜头透过使底片或胶卷曝光。press the shutter 按快门
A mechanical device of a camera that controls the duration of a photographic exposure, as by opening and closing to allow light coming through the lens to expose a plate or film.
遮光器：照相机上用来控制摄影曝光时间的一种机械装置，通过开与闭让光线从镜头透过使底片或胶卷曝光
The lens'resolution capabilities; The film's resolution capabilities; Camera and/or subject motion; Aperture used and consequent depth offield as well as use of optimum aperture. Film flatness — is thepressure-plate doing its job properly?
镜头的解像能力；胶卷的解像能力；相机或被摄体的移动；所用的光圈以及其相应景深；是否使用了最佳光圈；胶卷平度－相机的压力盘（压住胶卷的那个小长方形盘）正常工作吗？
In order to improve radiation from waveguide TM_ 01 mode, plate lens is laid at aperture plane of conical horn, phasic difference of 180 degree is produced along orthogonal fields for the acceleration of wave between plates.
为了改善圆波导TM01模的辐射特性，在圆锥喇叭口径处加平行板透镜，利用平行板的加速特性使正交方向的场产生180°的相位差。
The experimental results are given of the two kinds of compensation plates consiting of hologram plate and photoconductive thermoplastic plate for improving image quality of the Fresnel optical lens.
给出了“全息干版”和“光导热塑片”制备的两种“补偿板”对菲涅耳透镜进行象质改善的实验结果。
Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye.
被望远镜的透镜或反射镜所收集的光线，如今直接射到照相底板上，而不是天文学家的眼睛里。
The design and manufacture of PVC soft plastic plate circular Fresnel lens
软质PVC塑料平板Fresnel圆透镜设计与制造
Another antenna which is conical horn with a metal plate lens radiates linear polarized wave.
本文同时对加平行板的圆锥喇叭进行了研究，其特点是辐射线极化波。