Glossary Definition

# Microbolometer

A microbolometer is a specific type of bolometer (a very sensitive digital thermometer where its electrical resistance varies with temperature) used as a detector in a thermal camera.

It is a grid of microscopic Vanadium Oxide, or Amorphous Silicon heat sensors atop a corresponding grid of silicon. Infrared radiation from a specific range of wavelengths strikes the VOx, or amorphous Silicon, and changes its electrical resistance. This resistance change is measured and processed into temperatures which can be represented graphically.