photoconductor
Illumination changes resistance
A photoconductor is a material whose electrical conductivity increases when exposed to light.
In darkness, it resists current; illumination frees electrons and allows current to flow.
Photoconductors are essential components in photocopiers, laser printers, and some camera sensors, where light patterns create corresponding electrical signals.
Dry electrostatic copying process
- electrophotographyImaging via charged photoconductors
- drumStruck percussion cylinder
- tonerImaging powder or facial astringent
- laser printerLight-beam document output device
photocopier · charging · exposure · development · transfer · fusing · latent image · discharge
Component resisting less when bright
- light sensorDevice detecting luminosity
- image sensorLight-to-signal conversion chip
- CCDLight-sensitive imaging chip
- optical sensorLight-detecting electronic component
light meter · exposure meter · motion sensor · camera sensor · spectrophotometer
Partial electrical conductor
- seleniumElement number thirty-four
- zinc oxideInorganic UV-blocking compound
- polycrystallineHaving many crystal grains
- thin filmNarrow surface coating
doped · intrinsic · crystalline · germanium
Light-induced electrical activity
- electronNegative subatomic particle
- light sensitivityAdverse reaction to brightness
- recombinationGenetic material exchange process
- excitationStimulation of response
Light-to-current converter
- barcode readerOptical stripe decoder
- night visionAbility to see dimly
- medical imagingCreating pictures inside bodies
- security systemEquipment preventing unauthorized access
xerography
Dry electrostatic copying process
- electrophotographyImaging via charged photoconductors
- drumStruck percussion cylinder
- tonerImaging powder or facial astringent
laser printer · photocopier · charging · exposure · development · transfer · fusing · latent image · discharge · scanning
photoresistor
Component resisting less when bright
- light sensorDevice detecting luminosity
- image sensorLight-to-signal conversion chip
- CCDLight-sensitive imaging chip
optical sensor · light meter · exposure meter · motion sensor · camera sensor · spectrophotometer
semiconductor
Partial electrical conductor
- seleniumElement number thirty-four
- zinc oxideInorganic UV-blocking compound
- polycrystallineHaving many crystal grains
thin film · doped · intrinsic · crystalline · germanium
photoelectric
Light-induced electrical activity
- electronNegative subatomic particle
- light sensitivityAdverse reaction to brightness
- recombinationGenetic material exchange process
solar cell
Light-to-current converter
- barcode readerOptical stripe decoder
- night visionAbility to see dimly
- medical imagingCreating pictures inside bodies