power of a lens 中文意思是什麼
power of a lens
解釋
透鏡的焦強-
Compared with current instruments, the setup can decrease disturbance of disorder radiation by using double layer refractive index sample matching vessel, and it can increase collecting and transmitting efficiency of radiation by adopting single mode fiber with gradient refractive index lens. with a low power laser, the sample has a low scathe, and the laser and the measurement system can be integrated conveniently
與現有的同類型儀器相比，該儀器採用雙層折射率樣品匹配池減少了雜散光的干擾；採用帶梯度折射率透鏡的單模光纖接收、傳輸散射光信號提高了散射光的收集傳輸效率；用低強度的激光避免了對樣品的輻射損傷，同時可以使激光器和系統集成在一起，整個系統小型實用。 -
Hence, the cause of destruction lies in the cause of an alliance " s beginning. only through a comprehensive lens can we get a complete explanatory picture of the rise and fall of seato and the power that pushes the institutionalization of the alliance
文章通過對東南亞條約組織的建立和失敗過程的分析和其制度化進程的分析，運用現有的制度化安全合作理論和同盟理論，試圖用一種綜合現實主義，制度主義和建構主義的角度來分析東南亞條約組織制度化的過程。 -
According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d
本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。 -
Once unleashed, the power channels through a positively charged continuous energy lens at the center of the handle
能量一旦釋放，就會通過一個連續沖入正電的能量水晶導向劍柄中心。 -
If a nd : yag laser runs at high pump power, laser resonator will generate multimode beam due to thermal lens of active rod. the higher pump power is, the bigger divergence occurs and the smaller rayleigh range is
當nd ： yag激光器工作在高泵浦功率下時，由於nd ： yag激光器工作物質的熱透鏡效應導致了諧振腔輸出多模激光，隨著泵浦功率的升高激光光束發散角增大，焦深減小。 -
If you have knowledge in simple image processing, you may reduce the noise further by taking many exposure on the same object, and stack them together in computer. after gaining some experience, you many want to take close - up photos of clusters and nebula. since the magnifying and light collecting power of the camera lens is not enough, you have to connect the camera to a telescope
在1868年，法國天文學家pierre janssen發現了在太陽的光譜中，有一條奇怪的光譜線，起初科學家以為這是一種地球上並不存在的物質所造成的，所以把這種新物質命名為氦英文為helium ，這個字來自希臘語的helio ，意思即為太陽。
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