two-lens 中文意思是什麼

This paper analyses the critical angle method that often use in focus detected. we receive two relations, the first relation between refractive index of the critical - angle prism and focus - error signal ; the second relation between numerical aperture of object lens and out - of - focus error signal

本文針對伺服系統中常用的調焦方法-臨界角方法進行了分析，理論上得到臨界角棱鏡的折射率、物鏡的數值孔徑與離焦誤差信號的關系。

2. coupling systems between ld and optical fiber are separated into two categories : micro - lens optical fiber system and disjunct lens one

2 .把ld和光纖的耦合系統，分成微透鏡光纖耦合系統和分立式透鏡耦合系統分別進行了分析。

There are two basic types of shutters used in photographic cameras-between-the-lens and focal plane.

攝影照相機內使用的快門有兩種基本類型：透鏡間快門和集平面快門。

In this article, the fundamental principle and current research of optical data storage including cd and dvd, three - dimensional optical data storage and near - field high - density optical data storage are summarized. a two - dimensional finite difference time domain program for analysis of solid immersion lens system is compiled

本論文概述了已產業化的以cd和dvd為代表的光盤存儲技術和在開發中的高密度光存儲技術（主要包括三維光數據存儲技術及近場光學超高密度光存儲技術）的原理及研究現狀。

In the retrofocus project, a retrofocus structure with two elements is used in the object lens to enlarge fov and back working distance, in the head of which the negative meniscus have the effect of balancing aberration and deviating rays like a prism. and a standard hyperhemisphere immersion lens with high refractive index is put behind the object lens to satisfy the receiving of a detector with smaller photosensitive

反遠距設計方案中物鏡採用二片式反遠距結構，增大了視場和后工作距離，彎月型負透鏡在前，具有平衡像差和棱鏡的偏向作用;物鏡後放置高折射率標準超半球型浸沒透鏡，滿足小光敏面探測器接收。

Long focus object lens of three color achromatic aberration is one of two posers of optical design, using this method can get a perfect result. compared with pw method, the first results received from the wave - deviation method are more accurate and more rapid

使用此數學模型編的光學自動設計程序，也可以說是光學鏡頭設計的一種新方法，即實現自動選玻璃，求解初始結構（曲率半徑r ，厚度d等）和自動校正像差和優化系統等。

Ultramafic rock fragments, which almost is altered to ophite, distributed in structural zone and displayed structural lens. so far, 9 fragments were discovered and mapped in nujinshan and bujing area ultramafic rock can be divided two kinds according to it ' s geochemical characteristics. one can be correlated with metaperidotite, which represented residual part that primary pyrolite underwent moderate partial melting, from some representative ophiolite melange in the world

按超鎂鐵巖類的地球化學特徵可將其劃分為兩類：一類具有較高而穩定的mgo 、較低的al _ 2o _ 3 、極低的cao ， m f值為8 . 0 ? 8 . 4 ，按標準礦物組合進行分類可定為方輝橄欖巖，且均為fa _ （ 100 ） 、 en _ （ 100 ）的鎂質端元組分；可與世界上一些典型的蛇綠巖套中變質橄欖巖進行對比，代表了原始地幔中等部分熔融作用后殘余物。

A lens is an optical system including two refracting surfaces.

一個透鏡是包含兩個折射面的光學系統。

It was based on the principle of laser confocal microscope. and the two - dimensional scanning configuration was adopted by the optical scanner and the telecentric linear imaging objective lens of large numerical aperture to realize x - direction ' s scanning, and the conventional mechanical method using linear driver and linear guide track to y - direction ' s. the experiment results indicate that the device can run smoothly and rapidly, be operated easily and detect fluorescence effectively

儀器基於激光共焦顯微鏡的理論，採用振鏡和遠心線性成像物鏡實現x向掃描；精密導軌和步進電機實現y向掃描的檢測儀，經驗證，掃描儀具有快速、操作簡單、檢測晶元能力良好等特徵，有望彌補市場的空缺。

In the paper we mainly researched space gainp2 / gaas / ge high efficiency tandem cells " making process by home - made low pressure mocvd technology and new solar concentrators. firstly, we presented reseached and development of solar cells in china and foreign countries ; secondly, on the basis of fundamental priciples and theories, we discussed some factors of influcing conversion efficiency of solar cells, and analysed the i - v output feature of two - junction tandem cells ; then the design concept of gainp2 / gaas / ge two - junction tandem cells was discussed, the detailed aspects of gainp2 / gaas / ge tandem cells epitaxy growth by low pressure mocvd was studied, and some questions on epitaxy growth ( such as crystal qualities, interface stress, element interdiffusion, n - and p - type doping et all ) were solved ; after that, the cell fabrication process was described ; finally, we reseached the hot pressing and mould process technology of an arched line - focus fresnel lens made by pmma, designed and fixed new solar concentrators

本文致力於用自製的低壓mocvd裝置進行cainp _ 2 / gaas / ge空間用高效級聯太陽能電池製作的工藝以及聚光太陽能電池組件的研究。首先，介紹了國內外太陽能電池的研究現狀及應用情況；其次，運用太陽能電池基本原理討論影響電池轉換效率的因素，分析了級聯電池的伏安特性；隨后，討論了cainp _ 2 / gaas / ge雙結級聯電池的結構設計理念，研究了採用低壓mocvd技術生長cainp _ 2 / gaas / ge級聯太陽電池材料的工藝過程，解決了異質材料生長的結晶質量、界面應力、材料互擴散以及材料n 、 p型摻雜等一系列問題；然後總結了級聯電池的后工藝製作；最後，研究了以pmma為材料的菲涅耳線聚焦透鏡的熱壓成型工藝及其模具的加工工藝，設計並安裝完成新型聚光太陽能電池組件。

According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。

Conclusion secondary posterior chamber intraocular lens implantation is a safe and effective method in children over two years old with apbakics

結論二期後房型人工晶狀體植入術是治療2歲以上兒童無晶狀體眼的最佳方法，需要熟練掌握處理復雜情況的顯微手術技巧和經驗。

Imaging formula and object - image scale formula of laser beam transferred by focus lens are deduced according to the abcd law of matrix optics, and the factors that effect on beam focus properties are analyzed based on these two formulas

根據矩陣光學變換的abcd定律，推導出激光束經過單聚焦鏡變換后的成像公式和物像比例公式，並在此基礎上討論光束質量和聚焦系統特性對光束聚焦性能的影響。

By means of the rectangular d iaphragm and two orthogonal cylinder lens, the collimated laser is shaped, which is stretched and compressed respectively in two different directions, and the l ine source with ideal shape is achieved

並應用矩形光闌和兩個相互垂直放置的柱面鏡，對準直后的激光束進行整形，分別在不同的方向進行拉伸和壓縮，得到了形狀理想的線光源。

Objective to discuss the surgical techniques and clinical results of the nuclear delivery with two lens diallers in cataract extraction through small incision combined with intraocular lenses ( iol ) implantation

摘要目的探討雙鉤（晶狀體調位鉤）娩核法在小切口白內障囊外摘出人工晶狀體植入術中的手術技巧和臨床效果。

There are two kinds of space mechanism included in the research of this dissertation. one is the adjustment mechanism of the imaging lens ' s focal length of a space solar telescope, the other is deployable space structure

可動結構包含的范圍很廣，本文主要針對兩種類型的可動結構進行研究： （ 1 ）空間太陽望遠鏡成像鏡調焦機構； （ 2 ）空間可展開結構。

Methods using nuclear raising and rotating with two lens diallers, we had finished the catarat extraction through small incision combined with iol implantation in 266 cases ( 275 eyes ) of cataract patients

方法對266例（ 275眼）白內障採用雙鉤使核翹起和旋轉的方法娩出晶狀體核，完成小切口白內障摘出及人工晶狀體植入術。

Conclusion the cataract extraction through nuclear delivery with two lens diallers is an effective and ecnomic method in cataract surgery

結論採用雙鉤娩核白內障摘出是一種簡便有效的白內障復明技術。

Two - lens objective

雙透鏡物鏡

Two - lens ocular

雙透鏡物鏡