Pointing and focusing a laser beam on a target that is rocketing skyward at thousands of miles per hour is no easy task, but the Airborne laser is uniquely able to do the job.
对于飞行速度每小时数千英里的目标进行激光束瞄准和聚焦并不容易，但机载激光器是唯一能够完成这项工作。
In other words, ultrasound essentially travels in a very narrow beam — this makes it great for focusing the waves toward a desired area, but not for actual aural comprehension.
换言之，基本上超声波的传播声束极窄，这非常有利于将声波集中至指定地点，但对实际听力则无所助益。
A team of physicists in the us has created an infrared laser beam at a point in mid air, by focusing a UV laser onto a tiny volume of oxygen molecules.
美国的一个物理学家团队通过将一束紫外激光聚焦于一小块氧分子中，发明了一种聚焦于半空中一点的红外激光束。
Biologists discovered that the snail scatters light in all directions, rather than focusing it into a single beam.
生物学家们发现这种海蜗牛的光散向各个方向，并不是集中为一条光束。
The technology works by focusing sound into a narrow beam, just like light.
这项技术的原理是将声音压缩成类似于光的窄束。
The focusing characteristics of Gaussian beam through the List microscope objective is analyzed.
本文分析了高斯光束经里斯特显微物镜的聚焦特性。
The study on the beam smoothing and the focusing properties of the broadband harmonic field can provide valuable reference to the experiment.
对宽带倍频光的光束匀滑及聚焦特性的研究，可为实现靶面均匀辐照提供参考。
B. External fetal monitoring. The FHR is measured by focusing an ultrasound beam on the fetal heart. The fetal monitor interprets Doppler signals.
外监护。通过集中超声波束于胎儿心脏来描记胎心率，胎儿监护翻译多普勒信号。
The next thing is focusing with a laser beam on those things we did not do well.
下一个事情是，专注到那些我们做得不对的事情上。
Compared with traditional ultrasonic probe, ultrasonic phased array probe can realize transition, deflection and dynamic focusing of acoustic beam under electronic control.
与传统的超声波探头相比，超声相控阵探头可以实现电子控制下的声束平移、偏转与动态聚焦。
The effects of beam focusing and vacuum condition on the conversion are investigated experimentally.
实验研究了光束聚焦情况和真空度对光电转换效应的影响。
A super-powerful radiowave-beaming technology that lifts areas of the ionosphere by focusing a beam and heating those areas.
一种超大功率的无线电波发射技术，该技术通过聚集一道波束并加热那些区域将电离层的一些区域抬高。
This paper mainly analyses two scheme designs of focusing system by using the conjugate relation between pupil plane and image plane in Gauss beam.
文章应用高斯光束的瞳平面和像平面的共扼关系，分析激光聚焦系统的两种总体方案的设计。
We adopted Gaussian beam, ray tracing and vector diffraction integration together to analyze single beam spot-focusing lens antenna.
本文采用将高斯波束法，射线追迹和矢量衍射积分相结合的方法来分析单波束的点聚焦透镜天线。
Recently, a lot of literatures have studied focusing properties of beams particularly. Further studies of beam focusing are of great significance for lasers application and design of optical system.
已有大量文献对光束的聚焦特性进行了详细的研究，光束聚焦特性的进一步研究对激光束的应用和光学系统的设计有着极大的实际意义。
The characteristic of beam focusing is a very important issue of the ICF laser system.
光束聚焦特性是ICF激光系统中备受关注的问题之一。
The study of the focusing characteristics of laser beam is an important content in the study of laser propulsion technology.
激光束聚焦性能研究是激光推进技术研究中的一个重要内容。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。
The configuration keeps the excellent achromatic and focusing properties even for charged particle beam with very large energy spread.
该系统具有较好的消色差特性和聚焦特性，能量范围宽，特别适用于能散较大的带电粒子束流的传输。
All provide a reliable reference for the design of focusing coil and beam test.
上述工作为确定聚焦线圈的设计方案和加速器的出束实验提供了可靠、丰富的数据。
Optimization of the magnetic focusing system can decrease the radial magnetic induction and improve the electron beam quality.
通过对磁聚焦系统进行优化设计，外层电子注轨迹得到明显改善。
The focusing characteristics of Gaussian beam passing through the maladjusted telescope optic system are studied.
研究了高斯激光经过失调望远镜系统聚焦的特点。
The relations between the Fresnel number of a Gaussian beam and the parameters of the focusing Gaussian beam are analysed in this paper. And a simple method of design is given.
本文分析高斯光束菲涅耳数和聚焦高斯光束各参数之间的关系，给出了一种简便的设计方法。
A design method of laser focusing optical system is described and the design examples of optical system used for coupling laser beam and optical fiber are given.
结合激光光学理论，提出一种激光聚光光学系统的设计方法，并给出激光光束与光纤之间的耦合光学系统的设计实例。
A new type of focusing lens which can focus a laser beam into a line of any length and its possible applications are proposed.
提出了一种能把激光束聚焦成任意长度的新型直线聚焦透镜及其可能的应用。
The light beam surfacing system was developed which consisted of light beam generator, optical focusing system, powder-feed apparatus and work table.
研制了由光束发生器、聚焦系统、旋转气流送粉器、工作台组成的聚焦光束堆焊系统。
Relaying and spatial filtering on beam propagation are required in order to overcome self-focusing damage.
为了克服自聚焦造成的破坏要求在光束传播中采用中继成像和空间滤波。
When the wavelength ratio of the pump beam and the signal beam is 0.5 ~ 1.5, the focusing of the signal beam decreases with the rise of the ratio.
当抽运光与信号光的波长比取值为0.5 ~ 1.5时，信号光聚焦程度随着波长比的增大而有所降低。
I try a series of solutions, including intense focusing of my eyes and propping a flashlight on some books so that it casts its beam on my notes, but these remedies are unsatisfactory in the extreme.
我试了很多办法，包括睁着眼睛使劲瞅，在旁边的书上竖上手电筒，但最终效果都非常令人沮丧。
I try a series of solutions, including intense focusing of my eyes and propping a flashlight on some books so that it casts its beam on my notes, but these remedies are unsatisfactory in the extreme.
我试了很多办法，包括睁着眼睛使劲瞅，在旁边的书上竖上手电筒，但最终效果都非常令人沮丧。
应用推荐