electric eye
Light-triggered detector
An electric eye is a photoelectric cell that detects when a beam of light is interrupted, triggering a response—opening automatic doors, counting objects on a conveyor belt, or sounding an alarm.
The term evokes the device's function as a vigilant, unblinking sensor: The electric eye at the door opened it as we approached.
Light-to-current semiconductor
- photocellLight-sensitive electronic component
- detectorDevice that senses
- infraredHeat-bearing electromagnetic waves
- phototransistorLight-sensitive amplifying component
LDR · transducer · beam · light-sensitive · optical · receiver · emitter · reflector
Organic-mechanical hybrid entity
- roboticStiff and unemotional
- androidMachine resembling a person
- replicantBioengineered human duplicate
- TerminatorKiller android series
HAL · cyberpunk · dystopian · artificial · bionic · scanner · retinal · omniscient
Ongoing observation of something
- CCTVSurveillance camera network
- cameraImage capturing device
- observationAttentive watching or remark
- watchfulnessCareful, sustained attention
tracking · detection · security · scrutiny · vigilance · oversight · snooping · spying
Urgent warning signal
- intruderUnauthorized person present
- perimeterShape's outer edge length
- gateHinged barrier in fence
- tripwireConcealed activation cord
entry · exit · checkpoint · barrier · protection · elevator · retail · anti-theft
photodiode
Light-to-current semiconductor
- photocellLight-sensitive electronic component
- detectorDevice that senses
- infraredHeat-bearing electromagnetic waves
phototransistor · LDR · transducer · beam · light-sensitive · optical · receiver · emitter · reflector · proximity
cyborg
Organic-mechanical hybrid entity
- roboticStiff and unemotional
- androidMachine resembling a person
- replicantBioengineered human duplicate
Terminator · HAL · cyberpunk · dystopian · artificial · bionic · scanner · retinal · omniscient · futuristic
monitoring
Ongoing observation of something
- CCTVSurveillance camera network
- cameraImage capturing device
- observationAttentive watching or remark
watchfulness · tracking · detection · security · scrutiny · vigilance · oversight · snooping · spying · panopticon
alarm
Urgent warning signal
tripwire · entry · exit · checkpoint · barrier · protection · elevator · retail · anti-theft · shoplifting
synthesizer
Electronic sound-generating instrument
- automatic cameraspoint-and-shoot, autofocus, auto focus, compact camera, auto exposure
electric eyewatchman
Building security guard
visual inspection · naked eye · security guard · guard · sentry
electric, electricity, electrical, electrically, electrician, electrify, electrified, electrifying, electrification