electric eye - определение. Что такое electric eye
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Что (кто) такое electric eye - определение

DEVICE OR MECHANISHM FOR DETECTING OBSTRUCTION OF A LIGHT BEAM
Electric Eye; Electronic eye
  • Electric eye for a garage door opener

electric eye         
¦ noun informal a photoelectric cell operating a relay when the beam of light illuminating it is obscured.
Electric eye         
An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.
Electric Eye (video)         
LIVE ALBUM BY JUDAS PRIEST
Electric Eye (Judas Priest)
Electric Eye is a compilation DVD by Judas Priest released in 2003 and certified Platinum by the RIAA. It features music videos, BBC performances, and the first official DVD release of a concert filmed in Dallas, Texas during the 1986 Fuel for Life Tour, previously released as Priest...

Википедия

Electric eye

An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The device does not provide an image; only presence of light is detectable. Visible light may be used, but infrared radiation conceals the operation of the device and typically is used in modern systems. Originally, systems used lamps powered by direct current or the power line alternating current frequency, but modern photodetector systems use an infrared light-emitting diode modulated at a few kilohertz, which allows the detector to reject stray light and improves the range, sensitivity and security of the device.

Примеры употребления для electric eye
1. As someone who likes to photograph lightening but doesn‘t get much opportunity (live in an area of very little lightening), I know from experience that the only way you can get this type of daytime shot, other than incredibly sheer luck, is to have a photo–electric eye mounted to your camera that is specially designed to trigger the shutter the instant a strike is detected.