How the Charge Coupled image sensor works
A recent post here covered the definition of the Digital Image Sensor. Some of the information there is illustrated in the video below. I like the way that ‘EngineerGuy’ presents this video. It is simple enough for anyone to understand, comprehensive enough to feel satisfied with the explanation. He is so enthusiastic too. A great, and short, video. Enjoy!
Video by “EngineerGuy ” (Bill Hammack)
On YouTube: http://www.youtube.com/user/engineerguyvideo
As an additional piece of background, why not also have a look at the definition page for DSLR. It fits in well with this video and will help you understand the context of the image sensor.