axicon 中文意思是什麼
axicon
解釋
軸棱鏡-
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。 -
In this thesis, the properties of the free - space propagation and focus were studied when a beam propagates through an axicon
本論文主要是探討激光光束經過軸棱錐轉換后產生的無衍射光束的傳輸特性和聚焦特性。 -
The form of the psf has been deduced according to the fresnel diffraction, and it has been analyzed that the frings density of the psf depends on the axicon ' s refracting angle and the distance l between the point light source to lens l2
利用菲涅耳衍射理論，推導出相干光照明下無衍射系統的點擴散函數（ psf ）的形式，並分析出點擴散函數的條紋疏密與錐鏡的夾角和點光源的位置有關。
分享友人