The basic optical requirement is a fine pencil or thin ribbon of highly collimated, monochromatic, polarized light . 基本的光学要求是要有一个高度准直的单色偏振光的细光束或薄光带。
The basic optical requirement is a fine pencil, or thin ribbon of highly collimated, monochromatic, polarized light . 基本的光学要求是要有一个高度准直的单色偏振光的细光束或薄光带。
As the pulsar rotates, this beam sweeps the sky in the same way that a light house beam sweeps around the horizon . 当脉冲星旋转时，辐射来扫过天空，就像灯塔的光束绕地平面扫视那样。
Quite apparent is the fact that most laser beams are exceedingly directional, or if you will, highly collimated . 非常明显的是，大多数激光光束有很好的方向性，或者说，是高度准确的。
If an attacking aircraft was exactly in the centre between the two beams, the pilot's course would be continuously illuminated . 如果一架进攻的飞机恰好位于两道光束的中间，驾驶员的航迹便不断地被光束照明。
As we've seen, the laser is distinctive in that it emits all its energy in the form of a single, narrow, diffraction-limited beam . 我们已经看到，激光器的一个突出之点，就是把全部能量都集中在一个很窄的，由受衍射限制的光束内射出。
The effects produced when a beam of light falls on a crystal for varying angles of incidence can be readily visualized by a geometrical representation . 投射到晶体上的光束，由于入射角的变化所产生的不同效应，可以很方便地用一种几何图形体直观地显示。
Because the beam formed by a tapered coupler is produced by many rays that emerge at slightly different angles, the outgoing beam is characterized by a relatively large divergence . 因为尖劈耦合器形成的光束是由许多出射角稍有不同的光线组成的，放出射光束的特点是具有较大的发散度。
Smoke detectors - line detectors using an optical light beam 线型光束感烟火灾探测器
That gravity warps space and distorts beams of light 有关重力会使时空扭曲和使光束
