光束

Radio pulsars are rapidly spinning neutronstars that emit a lighthouse-like beam of radio waves that sweeps past theEarth as frequently as 600 times per second.

射电脉冲星是一种快速旋转的中子星，它发出的像灯塔的光束一样的无线电波，以每秒500次的速度扫过地球。

Through formula Derivation and Helmholtz reciprocity theorem,devices for parallel beam of P polarized light could be designed.

借助公式推导法及Helmholtz互易定理，可设计出平行入射P偏振光的光束集束器件。

The VELScope emits a cone of light into the mouth that excites molecules in cells causing them to absorb the light energy and reemit it as visible fluorescence.

VELScope向口腔发射圆锥型光束，激活细胞内的分子，使其吸收光能，变成可视荧光。

Ultrashort pulsed laser beam diffraction by one dimensional reflection volume holographic grating .

超短脉冲激光光束在一维反射型体全息光栅中的衍射。

Under the oblique incidence cases, the optical path difference of light beam distributed on the edge of steps can be calculated by using the geometric method. Then, according to the multi-slit Fraunhofer diffraction, the expression of diffraction intensity of reflection step grating is deduced.

针对反射性阶梯光栅，利用几何方法计算出斜入射情况下光束在台阶边缘的光程差的分布情况，根据多缝夫琅和费衍射推导出反射型阶梯光栅的衍射光强表达式。

As the orientation of optical axis is arbitrary, the polarization states and the amplitudes of the o ray and e ray and the refracted ray were given, and the theoretical expressions of the reflectivity and the transmissivity representing energy relations between the rays were obtained, which provide a theoretical basis for developing and applying crystal devices.

在晶体光轴取向任意的条件下，给出了反射的o光、e光以及折射光的偏振状态和振幅以及表明各光束间能量关系的折射率和反射率的理论表达式，为晶体器件特性的研究提供了有力的理论工具。

Resonant laser ablation is a two-step process, occurring within a pulse of a tunable laser, in which the leading edge of the laser pulse ablates the surface of the solid sample to produce neutral atoms or molecules that are then resonantly ionized by the trailing edge of the same pulse.

共振激光烧蚀技术是指发生在同一激光脉冲时间内的两步过程，它是指用波长可调谐的染料激光取代固定波长输出的激光，并调谐激光输出波长实现所研究原子或分子电子态之间的共振跃迁，激光单次脉冲的前沿对样品进行烧蚀，烧蚀的物质在激光光束内形成粒子气团，同一次激光脉冲的后沿实现对气相原子或分子的共振电离。

PEPC electro-optical switch used in beam reverser of multipass amplifier.

用于多程放大系统光束反转器的等离子体电极电光开关。

Instead of sunbeams, today's light-wave communication systems use laser light ricochet ing through tiny glass fibers.

今天的光波通信系统利用的不是日光束，而是通过微细玻璃纤维掠射的激光。

In cross section, of a right angle triangle.

光束分离器由相连接的两个棱镜组成。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。