Photodetectors

They generate analog signals proportional to the photon flux

Types

• Photoemission or Photoelectric
• Semiconductor
  • Active-Pixel Sensor
  • Charge-Coupled Devices
  • Reverse biased LEDs
  • Photoresistors
  • Phototransistors
  • Pinned photodiodes
  • Quantum dot photoconductors
• Photovoltaic Cells
• Photochemical
  • Photoreceptor Cells
  • Photographic Plates