fraunhofer diffraction 中文意思是什麼
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In order to analyze the effect of aberration of amplitude and phase of laser beam on centroid position of focal spot, based on the fraunhofer formula for light wave scaler diffraction theory, according to the definition of first order moment centroid position, the general expression of focal spot centroid position directly depending on the complex amplitude of near field is derived
摘要為分析振幅和相位發生畸變情況下光束焦斑質心位置所受的影響，以光波標量衍射理論中的夫瑯和費衍射公式為基礎，根據光斑強度分佈一階矩質心位置的定義，推導了直接依賴于光束近場復振幅分佈的焦斑質心位置的一般表達式。 -
( 2 ) based on the theory of diffraction, we push over the fraunhofer and fresnel diffraction of obscuration. moreover, the distribution of complex amplitude is given, and the rule is validated by the optical propagation software researched by caep
二、根據單縫衍射理論推導散射點的夫瑯和費和菲涅耳衍射規律，分別給出了散射點的夫瑯和費和菲涅耳衍射的復振幅分佈情況。 -
Fraunhofer - diffraction of the similar circular ring
類圓環的夫瑯和費衍射 -
This paper analyses light energy of fraunhofer diffraction of circular hole, and proves that the energy of airy disk is 84 % of light energy of normal incidence
摘要對圓孔夫瑯禾費衍射光能量進行了定量分析，並證明了愛里斑能量?入射光能量的84 % 。 -
From the single - slit diffraction experiment of apparatus for fraunhofer diffraction, it is seen that, in the single - slit diffraction pattern, while incident light is perpendicular to single - slit plane, bright fringe appears in the middle and symmetrical arrays of bright fringe with gradually decreasing intensity appear on both sides
從夫朗和費衍射裝置的單縫衍射實驗中可以看到：在入射光垂直於單縫平面時的單縫衍射實驗圖樣中，中間有特別明亮的亮紋，兩側對稱地排列著一些強度逐漸減弱的亮紋。 -
Under the weakly guiding approximation, we derive the electric - field distribution of the lp01 mode in the hollow fiber. the far - and near - field distribution of the lp01 - mode output beam in free space is calculated numerically from fraunhofer and fressnel diffraction theory
在弱波導近似下導出了中空光纖中lp _ （ 01 ）模的電場分佈，數值推算了lp _ （ 01 ）模輸出光束的遠場和近場分佈。 -
Simulation of fraunhofer diffraction phenomenon by fft
的衍射現象計算機模擬 -
Study of fraunhofer diffraction from complementary sierpinski carpet grating
互補sierpinski地毯光柵夫瑯和費衍射現象的研究 -
Fraunhofer - diffraction on a class of figures constructed ellipse and rectangle
在三江源地區研究了2種早熟禾屬牧草冷地早熟禾 -
The angle spectrum of inputting optical signals is received by the input surface of arrayed waveguides. whereas the diffraction process of light beam outputed in slab waveguide is a process of " composing frequency and generating image ". the reason that fraunhofer diffractive pattern can be gained on outputting waveguide surface is that output ends of arrayed waveguide distribute on the arch structure which leads bent phase factor to offset the quadratic phase factor in fresnel diffraction
輸入平板波導內光束的衍射過程是「分頻成譜」的過程，在陣列波導的輸入面接收到的是輸入光信息的角譜；而輸出平板波導內光束的衍射過程則是「合頻成像」的過程，正是由於陣列波導輸出口排列分佈在圓弧形結構上，其彎曲位相因子消去了菲涅耳衍射中的二次位相因子，從而在輸出波導面上能夠得到夫瑯和費衍射圖樣。 -
The sizing method based on fraunhofer diffraction is limited. because of the limitation of size parameter a ? 1 and size of photodetector, it ca n ' t measure the particles less than 5 microns accurately. to extending lower limit of measurement, inverse - fourier - transform technique is discussed
利用夫朗和費衍射理論時對粒子的界定要求尺寸參數a 1 ，又加上光電探測元件的尺寸受到限制，故不能準確地測量5微米以下的顆粒，為此必需擴大測量下限。 -
The measurement results to used the instrument based on the principle of fraunhofer diffraction are exact in the range of above 5 microns, but not of less than 5 microns
僅利用夫朗和費衍射原理的測粒技術雖然能對5微米以上的顆粒測量給出準確的結果，但對5微米以下的顆粒卻很難實現準確的測量。 -
( 4 ) an analytical theory is developed for predicting the second - order hot - image formation, which is focused by the negative second order diffraction of the fraunhofer hologram. further, the image location and its intensity are derived
（ 4 ）理論預言了「二階熱像」效應，並解析求出了「二階熱像」的成像位置，成像平面的光波復振幅分佈以及近似強度表示式。 -
When the diameter of the particles satisfied some conditions, mie theory is approximate to fraunhofer diffraction theory
當顆粒粒徑滿足一定條件時，米氏光散射可以用夫瑯和費衍射來近似。 -
To solve the problem, one of the main research work is to find a method which improve system based on fraunhofer diffraction
為克服這一點，探求在夫朗和費衍射系統基礎上的改進方法是本論文的主要工作之一。 -
By the way of numeriscal counting, fraunhofer diffraction are discussed, which can be aguide to computer analog of aptics experiment and digital image
摘要用數值計算方法，討論了夫瑯和費衍射特徵，對光學實驗的計算機模擬及數字成像有指導意義。 -
A simulation experiments system on oip was made using matlab. the main contents are : ( 1 ). some experiments for fraunhofer diffraction are simulated
本文提出了一種利用matlab軟體模擬光學信息處理實驗的方法並初步研製出模擬實驗系統，主要內容如下： （ 1 ） -
The advantage of the simulation system is as following : by adjusting the experiment ' s parameters arbitrarily, the distribution of light intensity and the design of fraunhofer diffraction can be observed and analyzed
模擬實驗的特點是：通過改變可調參數，得到相應的實驗現象，方便於分析各種衍射屏的衍射特點。 -
The topic we have tackled are as the following, ( 1 ) numerical simulation for light propagation and visualization of light - field distribution of fresnal diffraction and fraunhofer diffraction with ( 2 ) computation and display of hologram by method of simulation - anneal ( 3 ) hologram computation of a point source based on method of interference hologram computation
論文中具體完成了以下工作： 1 、對光的傳播特性進行了數值模擬，以可視化方式表現了菲涅耳衍射和夫瑯禾費衍射的光場分佈。 2 、用模擬退火演算法實現了全息圖的計算及顯示。 3 、在基於干涉全息圖的計算方法上，計算了一個點光源的干涉全息圖和相位分佈。
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