聚光孔徑 的英文怎麼說
中文拼音 [jùguāngkǒngjìng]
聚光孔徑
英文
light-gathering aperture-
The shadow mask is the critical component of the colour picture tube and the important component for the choice of colour, its function concentrates on the limitation of electronics bound diameter and the screening direction, the electronics bound which is sent by the electronics gun goes scanning, during the scanning process, we should guarantee every bound gathering into the small holes situated on the screen, then these bounds will point to the regularized position through the small holes on the flat mask, and then three basic colours will be produced, at the same time, those useless electronics will be blocked by the mask board
平板蔭罩是彩色顯像管的關鍵部件之一，是一個重要選色元件，其作用是限制電子束直徑和上屏方向，由電子槍發射的電子束在偏轉磁場的作用下進行掃描，掃描過程中必須使每個電子束只能射中熒光屏上的為該束指定的那些小孔上會聚，並通過蔭罩上諸多的小孔分別打到各自對應的熒光質點上，發出三種基色（紅，綠，藍） ，而無用的電子則被蔭罩板截獲。In the experiment, we use the he - ne laser and the semiconductor laser as the source, record the bessel beam patterns behind the axicon by using a digital camera and a microscope, measure the radius of the bessel beam central spot by film - scanning and measure the effect of both the radius of the aperture and the open angle of the axicon on the maximum non - diffraction distance. the experiments show that a specific propagating range has constant power and the beam has a bessel - like distribution in this range. the results agree with the beam corresponding to a diffraction free beam
同時我們還採用膠片掃描的方法測量了無衍射光束的中心光斑尺寸，測量了不同光闌孔徑和不同稜角情況下的最大無衍射距離和傳播軸附近橫截面內微小光孔中的光強，實驗結果顯示當激光光束經過軸棱錐轉換後有一段距離功率變化很小，且分佈近似貝塞爾分佈，符合無衍射光束的特性;經過聚焦后，呈現三維分佈中空的光束bottlebeam ，實驗結果與理論分析基本吻合。Aspheric mirrors and condensers in various diameters and relative apertures
各種不同口徑及相對孔徑的非球面鏡及非球面聚光鏡。Hence the usual caution not to close down the condenser aperture diaphragm below the suggested 2 / 3 - 4 / 5 of the objective ' s aperture
通常要求顯微鏡聚光鏡的孔徑光欄不應小於物鏡孔徑的1 / 3 ? 4 / 5 。The polyvinyl alcohol ( pva ) in precursor can improve the porosity and make the aperture distribution narrower. so the gels were not easily crazing when drying. simultaneously the fluorescence intensity of the dyes increased as a result of the probabilities of radiationless transitions
在先驅液中加入少量有機聚合物聚乙烯醇1 （ pva ）不僅改善了孔結構，使孔徑分佈窄，凝膠在乾燥過程中不宜開d裂，而且使摻于其中的染料分子的遷移運動受到限制；降低了非輻射i躍遷的幾率，提高了染料的熒光強度。Chapter 3 : in this chapter, the propagation characteristic and focusing properties of elegant hermite - cosh - gaussian ( ehchg ) beam through a finite aperture are investigated. the variance of the beam width, the generalized analytical expression of mg2 - factor and the power fraction of the truncated beam are derived theoretically and illustrated numerically
第三章：討論了eleganthermite - cosh - gaussian （ ehchc ）光束通過有限孔徑的傳播特性和聚焦性質，得到了其光束束寬， m ~ 2因子及能量分數的解析表達式，並分析了影響光束參數的因素及其變化規律。分享友人