beam n. 1.梁,棟梁,桁條;(船的)橫梁。 2.船幅;(動物、人的)體幅。 3.(秤)桿,杠桿,(織機的)卷軸,經(jīng)軸;(鹿角的)主干;車轅;犁柄;鋤把。 4.(光線的)束,道,柱;【物理學】波束,射束。 5.(笑容、表情等的)煥現(xiàn)。 6.【無線電】有效播聽范圍。 7.【航空】信號電波,指向電波。 a beam of light 一束光線。 the common beam 標準秤;準則。 beam and scales 天平。 a beam of delight 高興的表情,笑逐顏開。 an erector beam 【火箭】(發(fā)射時調(diào)整導彈位置的)千斤頂。 radio beam 無線電領(lǐng)航信號。 a landing beam 【航空】降落指示波。 abaft the beam = before the beam. a beam in one's eye 自己本身的大缺點〔與他人目中之刺相比,自己眼中有梁,源出《圣經(jīng)》馬太福音〕。 before the beam 【航?!空龣M前。 broad in the beam 〔口語〕臀部闊大。 fly the beam 【航空】按指向電波飛行。 fly the wet beam 【航空】順著河流飛行。 kick [strike] the beam 1. (秤一方)翹起;過輕,不足抗衡,無足輕重。 2. 輸,遭受失敗。 off the beam 脫離航向,不順利;不對頭;做錯。 on the beam 1. 【航?!颗c龍骨垂直地,正橫地。 2. 在航向上;對頭,做對。 on the port [larboard] beam 【航海】左舷正橫前。 on the starboard beam 【航?!坑蚁险龣M前。 on the weather beam 【航?!坑龣M風。 ride the beam = fly the beam. vi. 1.輻射,發(fā)光,閃光。 2.微笑,眉開眼笑。 vt. 1.發(fā)射(光線、電波)。 2.向…放[播]送。 3.(用雷達)探測。 4.(用波束)導航(飛機等)。 beam the program at America 向美國播送節(jié)目。 the sun beaming overhead 紅日當頭照。 beam upon 看著…微笑。 beam with joy 眉飛色舞,笑逐顏開。
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 發(fā)現(xiàn)了低衍射光束比高斯光束在激光消融聚合物材料上具有顯著的優(yōu)點。
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:闡述了利用矩陣本征值方法分析和設(shè)計激光諧振腔的系統(tǒng)理論;簡述了產(chǎn)生和實現(xiàn)低衍射光束的原理和方法,實驗發(fā)現(xiàn)了低衍射光束比高斯光束所具有的獨特性能;理論設(shè)計和研制了衍射光學元件,并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 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:闡述了利用矩陣本征值方法分析和設(shè)計激光諧振腔的系統(tǒng)理論;簡述了產(chǎn)生和實現(xiàn)低衍射光束的原理和方法,實驗發(fā)現(xiàn)了低衍射光束比高斯光束所具有的獨特性能;理論設(shè)計和研制了衍射光學元件,并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。
At the same time, the possibility of using nonlinear optics in widening the detecting wave band of hartmann-shack wavefront sensor is exploringly discussed . adaptive optics guarantees the beam quality of laser projecting system . beam cleanup, atmospheric turbulence compensation and correction of any disturbance and fabrication error in the light way are required to promise a near diffraction beam, but normal adaptive optics system can only correction one of them 自適應(yīng)光學進行光束大氣傳輸波前畸變校正時,要求系統(tǒng)必須能進行光束凈化和校正大氣湍流造成的波前畸變,并且能夠同時有效地克服發(fā)射系統(tǒng)制造誤差、重力變形以及光路內(nèi)部氣體擾動的影響,得到接近衍射極限的輸出激光光束。
The cavity mirror can also be designed according to an objective function . the second part ( the 5th chapter ) is to introduce the concept of low diffraction beam and to illustrate the principle and method how to realize it . a low diffraction beam is obtained by reconstructing the existing optical resonator of a co2 laser using a special diffraction phase plate 第二部分(第五章)提出了低衍射光束的概念,簡述了實現(xiàn)低衍射光束原理和方法;通過腔內(nèi)放置衍射元件的方法實現(xiàn)了低衍射光束的輸出;并對這種光束進行了理論和實驗研究,理論模型結(jié)果和實驗結(jié)果很好地吻合。
The cavity mirror can also be designed according to an objective function . the second part ( the 5th chapter ) is to introduce the concept of low diffraction beam and to illustrate the principle and method how to realize it . a low diffraction beam is obtained by reconstructing the existing optical resonator of a co2 laser using a special diffraction phase plate 第二部分(第五章)提出了低衍射光束的概念,簡述了實現(xiàn)低衍射光束原理和方法;通過腔內(nèi)放置衍射元件的方法實現(xiàn)了低衍射光束的輸出;并對這種光束進行了理論和實驗研究,理論模型結(jié)果和實驗結(jié)果很好地吻合。