photoelectric

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Related to phototransistor: Optocoupler

pho·to·e·lec·tric

(fō'tō-ē-lek'trik),
Denoting electronic or electric effects produced by the action of light. See: photoelectric effect, photoelectric absorption.

pho·to·e·lec·tric

(fō'tō-ĕ-lek'trik)
Denoting electronic or electric effects produced by the action of light.

photoelectric 

Pertaining to the interaction between radiation and matter resulting in the absorption of photons and the consequent emission of electrons.
References in periodicals archive ?
Take a remote control unit (thingy) that you know works well, and at a distance of less than a foot, point it at the Thingumajig's phototransistor. Press a button.
The machine language subroutine checked and rechecked the output from a phototransistor at intervals of [approximately equals] 50 [micro]s.
COMPONENTS FOR A MAGNETOMETER (Radio Shack part numbers in parentheses) Item Remarks Magnetic compass Needs to have transparent housing Op-amp integrated LM-741 circuit or equivalent (276-007) Resistor 820 ohms, 1/2 watt (271-022) Resistor 4.7 megohms, 1/4 watt (can use five 1-megohm resistors, 271-1356, in series) Light-emitting diode Infrared type (276-143) Phototransistor Infrared-sensitive NPN type (276-145) Solenoid The coil of a dismantled reed relay (about 20,000 turns of 0.06-mm wire) Rod Made of soft iron, about 50 mm long Potentiometer 10-kilohms, 15-turn type (271-343) Power supply Regulated, +15 and -15 volts DC, 100 milliamperes Circuit board (276-147) Sheets of acrylic Ideally 8 mm thick for rigidity
The team now hopes that the new phototransistor would have thousands of applications from digital cameras, night-vision headsets, and smoke detectors to satellites, military equipment, and many other devices that are embedded with electronic light sensors.
Phototransistors employ the principle of photodiodes, but the amplifying action of the transistor makes these devices more sensitive.
The phototransistor can help in recording high definition and clearer images even in low-light conditions, according to the research paper.
The receiver part consist of a phototransistor detector SFH 350V, a 5 V voltage, two resistors with 471[OMEGA] and headphone amplifier circuit.
Since IR emitters and receivers are used in combination, matching the wavelength of the emitter output with the peak sensitivity of the phototransistor receiver can result in improved performance and lower power consumption.
Designated the OPB733TR device, the infrared sensor uses a lensed IR LED and phototransistor elements to collimate the light beam, giving the device an optimizing detection range from 0.4" to 1.0" (10 to 25.4 mm).
The ERT-3280 Series is a sub-miniature (2.7 mm x 3.2 mm x 1.4 mm) reflective high-speed optical sensor combining a high-output GaAs IRED with a high sensitivity phototransistor. This sensor is designed for applications requiring a light-weight device and minimum installation space.
A standard optocoupler provides complete electrical isolation of electronic circuits from input to output while transmitting information across that electrical isolation barrier using infrared light from the phototransistor contained inside the optocoupler.