free space mode 中文意思是什麼
free space mode
解釋
自由空間模-
And this result is extended to the eigenfunction of maxwell ' s equations. then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes. as application, there are three examples : the emergent wave from planar waveguide to free space, the transverse and longitudinal coupling of waveguide and the measurement of scalar gratings
由於從一個空間到另外一個空間的光束傳播伴隨著界面上各個模式能量之間的耦合，作為應用，本文介紹了完備性在三個情況下的應用：平面波導出射光束的衍射性質、波導的橫向和縱向耦合以及標量光柵的測試。 -
Lastly, the thesis presents some designing schemes on interior facilities barrier - free for the wheelchair users by using the human body dimensions in chapter 2 ; at the same time, the thesis sums up wheelchair users " moving mode in bathing space, and designs barrier - free bathing space for wheelchair users
在第四章中主要是依據第二章中的人體尺寸，設計了對于輪椅乘坐者沒有障礙的部分室內常用設施的尺寸，同時總結了輪椅使用者在衛浴空間的行動方式，並進行了衛浴空間的無障礙設計。 -
On the other hand, the electric field and intensity distributions of the he11 mode in the hollow fiber are calculated by using the exact solutions of maxwell equations based on the vector model, and the diffracted near - and far - field distributions of the he11 - mode output beam under the fresnel approximation are studies. we derive an analytical expression on the far - field distribution of the he n - mode output beam in free space and discuss its applicable condition. we also analyze and compare the differences between the he11 - and lp01 - mode output beams, and find that the near - field distribution of the lpoi - mode output beam is a gaussian - like one, but the near - field distribution of the he11 - mode output beam is a doughnut - like one, whereas the far - field distribution of both the lp01 - and he11 - mode output beams are a doughnut one
此外，我們把中空光纖中lp _ （ 01 ）模（標量模型）和he _ （ 11 ）模（矢量模型）的場分佈以及它們各自的輸出光束的近場與遠場分佈進行了比較，發現兩種模式的輸出光束在近場分佈有很大的區別， lp _ （ 01 ）模輸出光束在近場是一個高斯分佈，而he _ （ 11 ）模輸出光束在近場是一個中空光束，在遠場兩種模式的輸出光束分佈是基本一致的，這正是由於在中空光纖中採用了弱波導近似以後所引起的誤差。 -
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。 -
We also propose two models to describe the propagation charcteristic of the focused hollow beam in 3d free space : one is the modified tem _ ( 01 ) mode doughnut beam model, the other is the width and narrow gaussian beam model
同時我們還提出了兩種聚焦中空光束的理論模型，一種是修改的tem _ （ 01 ）模式的doughnut光束模型，另一種是寬、窄高斯光束模型。
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