A hysteroscope is an endoscope that carries optical and light channels or fibers.

Kirk gathered with Chekov and Scott at the science officer's station and opened a voice and optical channel direct to the computer.

This yielded a total of four sound channels, as in the 4-track magnetic system, in the track space formerly allocated for one mono optical channel.

The underpinnings of large backbone networks are usually optical channels that cannot be quickly switched.

Rerouting in the case of a node failure does require changing the configuration of the optical channels.

Its contents are too dangerous to risk sending over any radio or optical channel.

The optical channel is made as thin as possible for a desired breakdown voltage.

The dome acts as a reflector, retaining all stray light and reflecting it onto the surface of the sensor, minimizing losses in a relatively long optical channel.

The optical channel would normally be employed only in daylight against very low-level targets or in a heavy jamming environment.

WFC3 was originally conceived as an optical channel only; the near infrared channel was added later.