arch pattern 中文意思是什麼
arch pattern
解釋
弓形紋-
At some unnatural hour of the morning the dairyman had caused the yawning chimney - corner to be whitened, and the brick hearth reddened, and a blazing yellow damask blower to be hung across the arch in place of the old grimy blue cotton one with a black sprig pattern which had formerly done duty here
在早晨天還沒有亮的時候，奶牛場老闆就吩咐人把那個大張著口的壁扇的爐角粉刷白了，磚面也刷洗得變紅了，在壁爐上方的圓拱上，從前掛的是帶黑條紋圖案的又舊又臟的藍棉布簾子，現在換上了光彩奪目的黃色花緞。 -
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。
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