charge injection device

astronomy

Also known as: CID

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Last updated

June 24, 2026

Quick Summary

A charge injection device (CID) is a semiconductor device used in astronomy, similar to a charge-coupled device (CCD). Both CIDs and CCDs are employed in telescopes to detect light from celestial objects. They utilize light-sensitive materials on silicon chips to electronically register photons. The primary difference lies in how the electric charge is transferred before being recorded. For astronomical purposes, CIDs and CCDs are often interchangeable. CCDs, in particular, are highly sensitive to light and are used in digital cameras and optical scanners due to their ability to store electrical charges.12

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telescope
Charge-coupled devices
Another similar device, the charge injection device, is sometimes employed. The basic difference between the CID and the CCD is in the way the electric charge is transferred before it is recorded; however, the two devices may be used interchangeably as far as astronomical work is concerned.
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Another similar device, the charge injection device, is sometimes employed. The basic difference between the CID and the CCD is in the way the electric charge is transferred before it is recorded; however, the two devices may be used interchangeably as far as astronomical work is concerned.
Read More