photoconductive cell
Definition
Noun: A photoconductive cell is a type of transducer. Its primary function is to detect and measure light and other forms of electromagnetic radiation. It operates on the principle of photoconductivity, where its electrical conductivity changes when it is exposed to light.
Usage
A photoconductive cell is used as a sensor in electronic circuits. It converts a light signal into an electrical signal.
Examples
- The automatic streetlight uses a photoconductive cell to sense when it gets dark.
- In the laboratory, a photoconductive cell was used to measure the intensity of the laser beam.
- The circuit diagram shows where to connect the photoconductive cell.
Advanced Usage
- In Series/Parallel Configurations: Photoconductive cells can be connected in specific electrical arrangements to modify sensitivity or output.
- Using two photoconductive cells in parallel increased the circuit's response to low light.
- Characterized by Response Time: The performance is often discussed in terms of how quickly the cell reacts to changes in light.
- For high-speed applications, a photoconductive cell with a fast response time is essential.
Variants and Related Words
- Photocell: A common shorter term for a photoconductive cell.
- Light-Dependent Resistor (LDR): A specific, common type of photoconductive cell where resistance decreases with increasing light intensity.
- Photodetector: A broader category of devices that detect light, which includes photoconductive cells.
- Transducer: The general class of devices that convert energy from one form to another (e.g., light to electricity).
Synonyms
- Photoelectric cell
- Optical sensor
Antonyms
- (Conceptual) Light emitter (e.g., LED, lamp)
Noun
-
a transducer used to detect and measure light and other radiations
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