空心射束 的英文怎麼說
中文拼音 [kōngxīnshèshù]
空心射束
英文
hollow beam-
When a collimated - well gaussian laser beam passes through a 27i - phase plate and then focused by a lens, a focused hollow beam ( fhb ) will be generated behind the lens, as a result of the completely ( r = 0 ) and partially ( r 0 ) destructive interference effects around the central region of the beam
當一束準直的高斯光束通過具有2位相分佈的位相片和一個薄透鏡時，這將導致在入射高斯光束中心的完全和部分相消干涉效應，於是在透鏡后就會形成一束聚焦中空光束（ fhb ） 。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。The results show that linear spatial chirp upsets the balance between diffraction and nonlinearity, leading to radiation and thus destroying the condition for the formation of soliton, although it doesn ’ t affect the central
結果表明:線性空間啁啾雖然對光束傳輸的中心位置沒有任何影響，但它打破了衍射與非線性效應的平衡，導致光束發散，從而破壞了孤子形成的條件。On the other hand, we give the condition of correctly solving range ambiguity and performance calculating formula of for stagger frequency difference ; condition of constraint for deciding stagger parameter value ; range " s analysis result for targets with multiple scattering centers or low altitude. this part includes chapter 2, 3, 4, 5
另外，我們還給出了參差比相測距正確解模糊的條件以及參差測距下的性能公式；提出了決定參差參數取值的約束條件；給出了多散射中心目標和低空目標的多頻連續波測距性能的結論。In order to help engineers solving the difficult problem of spatial layout in injection molding design, the adaptive and reconfigurable design methodology for injection molding was put for - ward, whose kernel was the mapping model of injection unit requirements to functional units to structural units based on constraints of reconfiguration
摘要針對復雜注塑模設計過程中的空間布局難題，提出了以重構約束的注塑成形單元需求功能元結構元映射模型為核心的注塑模適應性重構設計方法。The main work of this dissertation focuses on the analysis and design theory for a resonator with diffraction optical elements by using a matrix eigenvalue method. the principle and method how to realize a low diffraction beam have been described. both the experimental and theoretical results show that the low diffraction beam has great advantages over the gaussian beam in an ablation - dominated material removal processes
本文的重點是：闡述了利用矩陣本徵值方法分析和設計激光諧振腔的系統理論；簡述了產生和實現低衍射光束的原理和方法，實驗發現了低衍射光束比高斯光束所具有的獨特性能；理論設計和研製了衍射光學元件，並通過實驗獲得空心激光光束，提出了對不同空心光束的描述方法。The hollow optical beams have been analyzed theoretically, and have been realized experimentally by placing a diffraction optical element in the cavity
在理論上對空心光束進行了分析，並研製了能產生空心光束的衍射光學元件，將其插入激光諧振腔內，實現了空心激光光束。分享友人