A sensor channels the light signal along an optical fibre.

传感器沿光导纤维输送光信号。

《牛津词典》

The key development lies in the ability of the sphere, an optical device, not only to remain invisible itself but to slow light.

关键在于光纤球功能的开发，一种光学设备，不仅要保持自身的不可见性，还要能减缓光线。

youdao

To measure the difference in elevation between poles, surveyors used an optical level—a telescope on a level base—placed halfway between the poles.

为了测量两极之间的高程差，测量员在两极中间的一个水平基座上使用了光学水准望远镜。

youdao

An optical laser reads the transparency and creates a wobbly, out-of-tune, almost eerie-sounding keyboard effect.

NPR: Marco Benevento: Jazz Not Jazz

Picture an optical telescope, a really good optical telescope, and you have to think big.

ENGADGET

It's got an optical drive, too, which we can't say of all the notebooks listed here.

ENGADGET: Samsung Series 5 UltraTouch review: a solid, if slightly overpriced, mid-range Ultrabook