貝爾斑 的英文怎麼說
中文拼音 [bèiěrbān]
貝爾斑
英文
marshall-white syndrome-
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。Informing the man that a gentleman had come to see her, with whom she wished to walk a little way, she moved off with d urberville across the zebra - striped field
她對那個搖機器的人說，這個先生到這兒來看她，她想陪他走一會兒，說完就和德貝維爾穿過像斑馬條斑的那塊地走了。
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