Visual sensor
A visual sensor was part of the sensor technology which was placed on board starships and allowed visual frames of a specified region.

In 2152, moments after Captain Jonathan Archer found an alien device in launch bay 2, he activated visual sensor J-15 and left a message for a group of unidentified aliens, who had placed the device on board. ()

Voyager had long range visual sensors, which it used in 2374 to image a relay station in the Hirogen communications network. ()

Sensor technology