The AIM9 Sidewinder missile is famous for its success and use in air forces around the world. This video looks at the basic mechanics of how the infrared seeker and missile works.

For more on this fascinating topic, some links below. Courtesy to them for their valuable research and insights.

https://en.wikipedia.org/wiki/AIM9_S...

http://www.ausairpower.net/TESidewin...

http://www.ausairpower.net/TEIRGuid...