beam detector mirror have a 100 lenses
Detector Condensing lenses Ocular lens Electron beam
Light gate have a beam that rubs from one LED/IR light source onto a detector. The beam is "Cut" whenever movement is detected.
Motion detector alarm systems operate by using light sources. A beam of light is aimed at the light sensor and anyone who passes causes the sensor to register.
difference between detector and diode
A photo interrupter is an opto-electronic sub-system composed of an optical emitter and a detector with amplifier, typically with only logic level electrical output. The emitter uses simple beam forming optics to project light onto the detector, both elements being mechanically positioned with a fixed gap between them. The detector then can be used to sense if the free path between the emitter and the detector is blocked. When the beam path is blocked by an opaque object the logic output state switches, thus providing a non-contact presence sensor for automation. Transition edges can be used to trigger events, such as snapping a digital image with strobe illumination during high volume manufacturing to inspect aspects of production quality.
Smoke detectors work in several ways. A point to point smoke detector detects smoke when the beam projected by the transmitter is obscured in a measurable way and detected by the receiver. A photoelectric detector sees smoke particles inside the detection chamber of the smoke detector because light inside the chamber is scattered in a measurable way. An ionization smoke detector detects smoke because the smoke particles change the 'charge' on the detection plate inside the smoke detector.
"radar" is a palindrome for detector.
Radar is a palindrome for detector.
i just asked for a frequency detector jst as brain wave detector.
The cast of Detector - 2007 includes: Greg Joseph as Detector
Diode detector