Photodiode
part · 1950 · Digital age
A diode that turns light into current.
Principles and materials it uses
- Photovoltaic effect — uses. Light generates a current in the junction.
- Silicon — is made of. A photodiode is silicon.
- P–n junction — uses. Light generates a current in the p–n junction.
Where it is used
- Image sensor — is part of. A sensor pixel is a photodiode.
- Lidar — is part of. A receiver of reflected light.
- Fax — is used in. Scanning with a photocell.
- Smoke detector — is part of. An optical scattering sensor.
- Pulse oximeter — is part of. A photodiode.
- Light pen — is part of. A photocell catches the CRT beam.
- Gamma camera — is part of. Photodetectors for scintillations.
- Exposure meter — is part of. A photocell.
- Infrared seeker — is part of. A photodetector.
- Perceptron — is part of. Photocells read the image.
- PET scanner — is part of. Photodetectors register the scintillations.
- LIGO — is part of. A photodetector of the interference.
What it is a kind of
- Diode — is a kind of. A kind of diode.