Jump to content

Photodetector

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by 69.29.197.12 (talk) at 07:40, 2 January 2005. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)

Photosensors or photodetectors appear in several varieties:

  • Photoresistors or Light Dependant Resistors (LDR) which change resistance when illuminated
  • Photovoltaic cells or solar cells which produce a voltage and supply an electric current when illuminated
  • Photodiodes which can operate in photovoltaic mode or photoconductive mode
  • Phototubes containing a photocathode which emits electrons when illuminated and in general behaves as a photoresistor.

This article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Photodetector&oldid=13180072"