Optoelectric Devices
Optoelectric Devices
Light• Electromagnetic radiation visible to human
eye• Frequency range
300 to 300,000,000 gigahertz• Visible region
400,000 to 750,000 gigahertz
Figure 26-1. Photo cell.
Figure 26-3. Construction of a solar cell.
Figure 26-5. PN junction photodiode.
Figure 26-6. PIN junction photodiode.
Figure 26-7. Photodiode package.
Figure 26-9. Voltage divider using a photodiode.
Figure 26-12. Darkness-on DC switch.
Figure 26-13. LED construction.
Figure 26-14. Common LED packages.
Figure 26-19. Commercial optical coupler.
Semiconductor devices that interact with light• Light-detection devices• Light-conversion devices• Light-emitting devices
Light is electromagnetic radiation that is visible to the human eye
Light-sensitive devices include photo cells, solar cells, photodiodes, and phototransistors
Light-emitting devices include the LED (light-emitting diode)
An optical coupler combines a light-sensitive device with a light-emitting device