On the base of the Westervelt equation, this paper studied the acoustic field of the second harmonic of a collimated beam of sound, in particular the directional characteristics.
以Westervelt方程为理论基础,推导了平面波束二次谐波的声压和声强分布,得出平面波束的二次谐波的指向特性主要与波束的尺寸和波长的相对比值、波束的频率有关,高频时也会有旁瓣出现,但在所有频率范围以内都有较尖锐的指向特性。
A fiber optic displacement sensor based on the principle of collimated beam reflective intensity modulation is constructed.
讨论并建立了一种基于平行光束发射光强调制的光纤位移传感器 ,该传感器的入射和接收光纤的端部都用渐变折射率光纤 (GRIN)制成的透镜耦合。
In order to extract parallel beam from ion sources,it s necessary to design suitable electrode configurations in extraction zone.
扩展Pierce理论的应用范围,通过解析求解泊松方程和拉氏方程,在固定发射面的情况下,得到了在给定束流强度密度下带状平行束外空间电位分布的一般方法,可为引出系统的设计提供一定的参考。
collimated lihgt beam
准直光束，平行光束
collimated laser beam
激光平行光束，平行激光束
parallel beam stress meter
平行光束应力测定仪
direct shadow parallel light apparatus
平行光束阴影摄谱仪
a parallel beam of light passing through it is caused to diverge or spread out.
平行光束通过它能够发散或展开。
a concave reflector used to produce a parallel beam when the source is placed at its focus or to focus an incoming parallel beam.
当光源来自焦点以产生平行光束或者平行光束以产生焦点的凹入的反射镜。
Studies on the Coupling Performance of GRIN Polymer Micro-Sphere;
GRIN聚合物微球用作平行光束至光纤的耦合器的耦合性能研究
Under astigmatism even narrow parallel light beams will not combine into one point.
有象散存在时甚至很窄的平行光束都不能会聚在一点。
The Longitudinal Displacement of Parallel Beam Reflected from a Single Layer Weakly Absorbing Type-II Dielectric Interface
平行光束在单层弱吸收Ⅱ型界面上反射时的纵向位移
Study of the Beam Shaping of Laser Diode Arrays Using Two Parallel Plane Mirrors
双平行平面反射镜在激光二极管阵列光束整形中的应用
splitting a ray into two parallel rays polarized perpendicularly.
使光波分裂成两束平行的垂直偏振的波。
Performance of a soft x-ray splitter grating parallelism measuring system by diffraction method
衍射法X射线激光分束光栅平行度测量系统(英文)
The light from a laser is like a pencil of light in that it has nearly parallel sides.
激光象一束两边几乎平等的光
Study of Intensity of Vectorial Nonparaxial Flattened Gaussian Beams;
矢量非傍轴平顶高斯光束的光强研究
The highly accurate test and control of parallel of the two coherent beams of the stellar interferometer by CCD correlation tracker have been achieved.
CCD相关跟踪器被应用在恒星光干涉仪中，实现了干涉仪两相干光束平行性的高精度探测与控制。
"Diverging lens causes the rays of a parallel beam of light to spread out and appear to come form a point, i.e. the rays diverge. It produces a virtual image at its principal focus. Such a lens is thinner at the center than at the edge"
散光镜使一束平行光线散开而形似出发于一点,在其主焦点上产生虚像, 这种透镜的心比边缘薄
Spot/Directional Light
目标聚光灯/平行光
Spot/Directional Light Vie
目标聚光灯/平行光视图