The reflectivity of optical mirrors can be obtained by measuring linewidth of transmission spectrum of optical cavity and the fineness of Fabry-Perot (F-P) cavity.

谐振腔精细度法是通过测量光学谐振腔透射谱线宽度来实现对光学反射镜反射率的测定。

youdao

Mirrors attached to the rollers form part of an optical system.

装在圆筒上的小镜是光学系统的一部分。

youdao

The environmental and the actual condition tests show that the infrared system with metallic mirrors has met the requirement of optical design.

系统经外场实际测试的结果表明，使用了金属反射镜的红外热成像系统达到了光学系统的设计指标。

youdao

But the optical switch takes the flickers of lights flashing by and, with the use of its micro-mirrors, redirects them from one optical fibre to another.

ECONOMIST: Reinventing Marconi

They are devising ways to send optical signals vast distances without the need for expensive electronic goosing, tinkering with mirrors to switch and bend light in new ways and trimming costs to open up entirely new parts of the telecom infrastructure.

FORBES: Hooked on photonics