细光束 meaning in Chinese

beamlet
thin pencil of ray

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。
Narrow central pencil
中心细光束