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- Optical limiting by using thermal self defocusing[J]. 引用該論文 司金海;劉樹田;楊淼;楊昆;李淳飛.
- The recipe design,melting and ion exchange process for the defocusing and focusing GRIN fiber lens glasses is studied. 本文對發散型和聚焦型兩種纖維透鏡玻璃的配方設計、熔制以及離子交換工藝進行了研究。
- Photolithographic Fabrication Techniques by Using Defocusing Laser Direct Writing[J]. 引用該論文 李鳳友;盧振武;謝永軍;張殿文;裴蘇;趙晶麗.
- Based on the ABCD matrix and Gaussian beam propagation theory, the Gaussian beam transforming formulas through a parabolic defocusing GRIN fiber lens are derived. 本文根據ABCD矩陣和高斯光束傳播理論,導出高斯激光束經拋物型發散梯度折射率纖維透鏡的變換公式。
- Analyzed is the dependence of the defocusing quantity on the hologram size and the spatial frequency bandwidth of the object. 分析了全息圖尺寸及其記錄的空間頻帶寬度與離焦量的關係;
- The experiments of measuring convergent beam wavefront with a quadratic grating are carried out.It is found that the defocusing aberration... 由於大功率激光束的不穩定性,其波前變化非常快,所以該方法的實時性非常適合於這種波前變化的測量。
- Simulation results show phase-diversity method can accurately retrieve the wavefront and defocusing of one wavelength is optimal. 模擬研究結果表明，相位差法可以較準確的恢復出波前相位，並且最優化的離焦波面差為一個波長。
- Both the power control model and linewidth model of the proposed method are established with defocusing amount as the unique variable. 推導了穩定線寬后的光功率控制模型和線寬模型,模型中的變數僅為離焦量,降低了光功率控制的複雜性。
- The primary factors affected welding depth and width have been studied, for example: welding power、speed、defocusing parameter and flow parameter. 進行了厚鋼板和汽車齒輪的激光焊接實驗,實際測量了激光功率、焊接速度、離焦量、輔助氣體等工藝參數對焊接質量的影響。
- The linear focusing effect and linear defocusing effect on the interaction between spatial solitons have been studied by numerical simulation. 結果表明,線形聚焦效應增強了空間孤子之間的相互作用;
- The present research mainly focuses on detecting the processing stability,assembly quality,defocusing,weld penetration,weld shape,pool and keyhole,etc. 目前實時檢測的內容主要有焊接過程的穩定性、裝配質量、離焦量、焊縫熔深和表面形貌、熔池與小孔的形態等。
- The positions for focusing foci and defocusing foci can be exchanged by turning on or off the coding state of spatial light modulator. 開關SLM的編碼態，聚焦點和散焦點的位置交換。
- The effects of lighting wavelength, coherent coefficient, aperture number and defocusing to image quality can be studied with this method. 用於研究照明波長、相干係數、數值孔徑及離焦等對成象質量的影響。
- Important applications of isotropic nonlinear materials are seen in self-focusing, defocusing phenomena, switching systems, etc. 各向同性非線性材料的重要應用包括自聚焦和散焦現象、開關係統等。
- Abstract The El mass sprctra of organophosphorus compounds containing tyraminyl radical were studied by means of high resolution and metastable defocusing MS technique. 摘要 本文在亞穩態測定和高分辨精確質量計算的基礎上,研究了二類酪胺基有機磷化合物的質譜裂解規律。
- Dual waveband signals in high power laser welding were recorded and analyzed, especially, the law between the signals magnitude and the defocusing was discussed. 記錄和分析了高功率激光焊接中工作區的紫外和紅外信號，著重分析了雙波段信號與離焦量變化的對應規律。
- At the same time, the popular culture appearing with the course of modernization exerts the strategies such as conversion focalizing and defocusing etc. to solve the crisis. 同時隨現代化進程而出現的大眾文化運用「轉換」、「聚焦」、「散焦」等策略展開了對於時間危機的拯救。
- Research results show that the incline and defocusing of reflection plane in optical instrument (such as telescope and camera) reduce the intensity of the "Cat"s eye" reflection. 研究結果表明:回波強度受光學儀器內部反射面傾斜和離焦及光學鏡頭相對孔徑的影響較大,掃描光束的入射角和物鏡相對孔徑等因素對回波強度也有一定影響。
- By means of a Reyleigh-Ritz optimization procedure, the closed form solutions for the evolution of beams in both defocusing and self-focusing cases can be obtained. 運用瑞利-里茲方法求解其變分方程，分別求出光束在自散焦和自聚焦介質中的變分解。
- The studied results showed that,it is direct proportion to laser power,inverse proportion to welding speed and exponential proportion of 4 orders to defocusing distance. 焊接體能量與激光功率成正比、與焊接速度成反比、與離焦量成四階指數關係,與焦點尺寸成平方關係。
