photosensor


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photosensor

[¦fōd·ō′sen·sər]
(electronics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

photosensor

A light-sensitive device that is used in optical scanning machinery. See photoelectric.
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References in periodicals archive ?
Kim, "The characteristics of photosensors and electronic dimming ballasts in daylight responsive dimming systems," Building and Environment, vol.
The Sci-Fi have been characterized to measure the attenuation length of the light over the distance travelled from the production point to the end of the fiber that is optically coupled to a photosensor. The manufacturer supplies a range of catalog specifications for all types of Sci-Fi with a diameter of one millimeter.
The wall-mounted photosensor is provided with a crescent-shaped shield such that it only "sees" the rotating mirror and stray light within its field of view over the vertical angles 0[degrees] to 180[degrees].
"Simulation of Adaptive Equation of Photosensor Array Parameters Using Microscanning", // Informal Processes, vol.
Each system was controlled by a photosensor, which ensured that the LED lighting did not come on during the day or when the overhead lights were on, and by a motion sensor that slowly turned the lights on when the resident put his/her feet on the floor or when a nurse walked into the room.
The built-in photosensor controls the LEDs based on ambient light levels, making this camera an suitable for night-time security uses.
Instead of individual photocells, one large-area, specially structured photosensor generates the four 90-degree electrically phase-shifted scanning signals.
For example, component degradation occurs whenever corrective maintenance is required, such as a loose belt, a worn brush of a motor, dust on a photosensor, etc, but the components have not failed.
Any metal contaminants are identified to sensitivity levels of 1.5mm Fe and, if any contaminated product is found, the microprocessor-controlled Combo instructs an air-jet to blow the wedge into a sealed bin, and a photosensor alarm system automatically stops the line if the rejected pack fails to enter the bin.
A tab on the back of the mirror interrupts the photosensor light beam circuit as the mirror crosses maximum deflection.
"They wanted us to reduce energy, minimize artificial light, maximize daylight, minimize toxic and hazardous waste, and avoid light pollution and trespass by using technologies that were environmentally friendly." With the big-picture strategy in hand, Schuler Shook and architect SCB filled in the details by using energy-saving sources with low mercury content, abundant natural light, and photosensor controls and dimming to produce a lighting power density of just 0.91 watts per sq ft--a 20 percent reduction over the ASHRAE/IES 90.1-2007 requirement.