beam n. 1.梁,栋梁,桁条;(船的)横梁。 2.船幅;(动物、人的)体幅。 3.(秤)杆,杠杆,(织机的)卷轴,经轴;(鹿角的)主干;车辕;犁柄;锄把。 4.(光线的)束,道,柱;【物理学】波束,射束。 5.(笑容、表情等的)焕现。 6.【无线电】有效播听范围。 7.【航空】信号电波,指向电波。 a beam of light 一束光线。 the common beam 标准秤;准则。 beam and scales 天平。 a beam of delight 高兴的表情,笑逐颜开。 an erector beam 【火箭】(发射时调整导弹位置的)千斤顶。 radio beam 无线电领航信号。 a landing beam 【航空】降落指示波。 abaft the beam = before the beam. a beam in one's eye 自己本身的大缺点〔与他人目中之刺相比,自己眼中有梁,源出《圣经》马太福音〕。 before the beam 【航海】正横前。 broad in the beam 〔口语〕臀部阔大。 fly the beam 【航空】按指向电波飞行。 fly the wet beam 【航空】顺着河流飞行。 kick [strike] the beam 1. (秤一方)翘起;过轻,不足抗衡,无足轻重。 2. 输,遭受失败。 off the beam 脱离航向,不顺利;不对头;做错。 on the beam 1. 【航海】与龙骨垂直地,正横地。 2. 在航向上;对头,做对。 on the port [larboard] beam 【航海】左舷正横前。 on the starboard beam 【航海】右舷正横前。 on the weather beam 【航海】迎着正横风。 ride the beam = fly the beam. vi. 1.辐射,发光,闪光。 2.微笑,眉开眼笑。 vt. 1.发射(光线、电波)。 2.向…放[播]送。 3.(用雷达)探测。 4.(用波束)导航(飞机等)。 beam the program at America 向美国播送节目。 the sun beaming overhead 红日当头照。 beam upon 看着…微笑。 beam with joy 眉飞色舞,笑逐颜开。
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 发现了低衍射光束比高斯光束在激光消融聚合物材料上具有显著的优点。
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 本文的重点是:阐述了利用矩阵本征值方法分析和设计激光谐振腔的系统理论;简述了产生和实现低衍射光束的原理和方法,实验发现了低衍射光束比高斯光束所具有的独特性能;理论设计和研制了衍射光学元件,并通过实验获得空心激光光束,提出了对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 本文的重点是:阐述了利用矩阵本征值方法分析和设计激光谐振腔的系统理论;简述了产生和实现低衍射光束的原理和方法,实验发现了低衍射光束比高斯光束所具有的独特性能;理论设计和研制了衍射光学元件,并通过实验获得空心激光光束,提出了对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 自适应光学进行光束大气传输波前畸变校正时,要求系统必须能进行光束净化和校正大气湍流造成的波前畸变,并且能够同时有效地克服发射系统制造误差、重力变形以及光路内部气体扰动的影响,得到接近衍射极限的输出激光光束。
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,简述了实现低衍射光束原理和方法;通过腔内放置衍射元件的方法实现了低衍射光束的输出;并对这种光束进行了理论和实验研究,理论模型结果和实验结果很好地吻合。
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,简述了实现低衍射光束原理和方法;通过腔内放置衍射元件的方法实现了低衍射光束的输出;并对这种光束进行了理论和实验研究,理论模型结果和实验结果很好地吻合。