View Full Version : Spacelab CCD experiment

2004-Mar-17, 05:55 PM
I'm doing a lab report on a Spacelab experiment of the properties of a LYNXX CCD. As I do it, I may have questions for the esteemed honourable denizens of this noble board.

Question number 1
Is the release of electrons in the CCD a result of the photoelectric effect?

Question number 2
Could the old vidicon tubes be used for still photography?

2004-Mar-17, 09:44 PM
I don't know specifically about the Lynxx CCD, but in general the answer to question 1 is yes. The term CCD denotes a wide variety of device but they all essentially move charge about in a controlled manner. For imaging application the input charge to the CCD usually comes from a photodiode (I don't know how else they would do it), and a photodiode works on the photoelectric effect.

To use the CCD for imaging you will need to convert the light to charge. For size, cost, and probably other considerations I can't think of, it's best to combine the photon-to-charge device and the CCD into one IC. And the photodiode is probably the simplest photo-to-charge device you can make on an IC.