defocusing 中文意思是什麼
defocusing
解釋
發散-
A dark - soliton perturbation theory on the defocusing nonlinear schr dinger equation
方程的暗孤子微擾理論 -
The feasibility and some advantages of employment of sil have been discussed. the numerical aperture are calculated when laser pulse is defocusing. in contrast with traditional microscopy objective, the employment of solid immersion lens can effectively increase the numerical aperture of the recording system ; thereby it can increase the volumetric density and decrease the demand of the incident laser power
當脈沖聚焦點相對于固體浸沒透鏡底面離焦時，對系統的有效數值孔徑進行了計算，結果表明採用固體浸沒透鏡離焦的方式進行記錄，系統的有效數值孔徑最低可增大到固體浸沒透鏡插入前的折射率倍，其數值孔徑的理論極限值為存儲介質的折射率。 -
It ' s well known that both thermal self - defocusing effect and reverse saturable absorption can lead to optical limiting
眾所周知，熱自散焦效應和反飽和吸收效應都能導致光限幅。 -
The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing. the equation describing the evolution of the laser spot is derived. it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam
考慮多光子電離效應和光學kerr效應，首次利用力學類比的方法研究了超短脈沖激光在電離氣體中的傳輸，詳細分析了傳輸距離與激光初始光斑、初始發散角以及激光功率的關系，提出了實現長距離傳輸的條件。 -
From maxwell equations the refractive index equation and hamilton - jacobi equation, which describe the evolution of the electric field, are derived including the effects of the diffraction, the third - order intensity - dependent nonlinearity, plasma defocusing, the focusing and defocusing of the plasma channel, and the relativistic self - focusing
從maxwell方程出發我們得到了兩個包含衍射、三階強度非線性、等離子體散焦、等離子體隧道聚焦和散焦以及相對論自聚焦等效應在內的激光場演化方程，即折射率方程和哈密頓-雅可比方程。 -
In this paper, dual - beam transmission problem that possess to a certainty included angle and gains the nonlinear schrdinger coupled equation ( nnlse ) in self - defocusing media is discussed
摘要自散焦介質中雙光束斜入射耦合能發生光束偏轉，通過數值模擬發現在非線性折射率不是均勻分佈時光束偏轉能降低抽運光功率並且偏轉角度不減小，在相同的功率條件下，能產生更大的偏轉。 -
Static uniform defocusing is a common kind of blurring in static state, this paper gives method of judging whether blurring image is uniform defocusing, the method compares picture of real gray with picture of ideal energy, it is clarity and intuitionist
靜態均勻散焦是在靜態情況下的一種常見模糊，本文給出了判斷模糊圖像是否是均勻散焦的方法，通過對比實際的灰度圖和理想能量圖來判斷，直觀明了。 -
Research on focusing system characteristics and defocusing application in laser direct writer
激光直寫調焦系統特性及離焦應用研究 -
The common path defocusing 4f shearing interferometer in the system was constructed, which is fit for the dense plasma measurement. the advantages of this system consist in its stability and easy adjustment as the common path system and respective adjustability of shearing amount and stripe spatial frequency as m - z interferometer as well
設計了基於共光路結構的離焦4f剪切差分干涉儀，該干涉儀同時具有m - z型干涉儀的剪切量和條紋空間頻率分別可調的優點以及共光路結構的穩定性和易於調節的優點，使得在稠密等離子體的測量中，系統參數可以兼顧小的剪切量和大的條紋空間頻率。 -
Semi - classical limit of cubic defocusing nonlinear chrodinger system
非線性散焦立方薛定諤方程的半古典極限 -
How a dark pump beam induces a bright probe beam to focus in two - and three - dimensional self - defocusing media is discussed in chapter 5
第五章，討論了二維和三維自散焦介質中具有暗光束分佈的泵浦光對基模高斯信號光的聚焦作用。 -
Secondly, it is numerically simulated how a dark pump beam induces a bright probe beam ( with the gaussian profile spatially ) to focus in two - and three - dimensional self - defocusing media, and the main factors that have influence on the focusing of the probe beam are also analyzed
二、研究了具有暗光束分佈的泵浦光與基模高斯型信號光在二維和三維自散焦介質中同向共同傳輸時的誘導聚焦現象，分析了影響聚焦過程的主要因素。 -
Secondly, the third order nonlinear optical properties of these compounds are studied under the excitation of ps pulsed laser with the wavelength of 1064nm using z - scan technique, nonlinear refractive indices and nonlinear absorption coefficients are calculated according to the z - scan experiment curves of the compounds. all the three compounds have self defocusing characters and two photon absorptions. lastly, nonlinear refraction and absorption properties of these compounds are studied by z - scan technique under the excitation of ps pulsed laser with the wavelength of 532nm the self defocusing and reverse saturation absorption are found in these compounds
根據實驗曲線計算了它們在1064nm下的三階非線性折射率和非線性吸收系數，三種化合物都具有自聚焦特性，並且在該波長下，三種化合物均具有雙光子吸收，最後，以皮秒脈沖的532nm為激發波長，採用z掃描方法，研究了三種金屬有機化合物的非線性折射和非線性吸收性質，在該波長下三種化合物仍然表現為自聚焦特性，且其吸收為反飽和吸收。 -
In this thesis, induced focusing in self - defocusing media is explored thoroughly by numerical method
本文用數值方法對自散焦介質中的光束誘導聚焦現象進行了系統的研究。 -
The historical review is given about the research on the induced focusing of optical beams in self - defocusing nonlinear media
在此基礎上對三維自散焦介質中由交叉相位調制效應誘導的光束聚焦進行系統研究。 -
In this, we focus on the phenomena of the induced focusing when two beams propagation in self - defocusing nonlinear media in an off - axis geometry
本論文旨在研究三維自散焦介質中由交叉相位調制效應誘導的光束聚焦。 -
It has been theoretically and experimentally demonstrated that in self - defocusing media, a weak beam ( the probe ) can be induced to focus by a strong beam ( the pump ) that propagates simultaneously with it
理論與實驗結果均表明，在自散焦介質中，強泵浦光可誘導與其共同傳輸的弱信號光聚焦。 -
In chapter 4, it is simulated that a probe beam and a pump beam counter - propagate in a two - dimensional self - defocusing medium and thorough analyses are made to the induced focusing in this configuration
第四章，用分步傅立葉方法模擬雙光束在二維自散焦介質中的對向共同傳輸過程，對出現的誘導聚焦現象進行了系統的分析。 -
The thesis analyzed the effects, associated with the propagation of laser in plasma channel, such as diffraction, plasma defocusing, the third - order intensity - dependent nonlinearity, the relativistic self - focusing, the focusing and defocusing of the plasma channel, and the absorbtion in the collision plasma and the finite pulse length effect
文中用哈密頓-雅可比方程方法和源展開方法分別對激光在等離子體隧道中傳輸所涉及的衍射效應、等離子體散焦效應、三階強度非線性、相對論自聚焦、等離子體隧道的聚焦和散焦效應、碰撞等離子體中的吸收效應、有限脈寬效應等等做了基本的闡述。 -
Self - focusing and self - defocusing have their origin in the intensity dependence of the refractive index of the nonlinear medium. the picture becomes more complicated when two copropagating optical beams affect each other through nonlinear cross - phase modulation
當兩光束共同在非線性介質中傳輸時，兩光束由於交叉相位調制效應將會相互作用，其物理機制變的比較復雜。
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