Multi-layer CCD

A '''multi-layer CCD''' is a CCD image sensor that captures true RGB using stacked CCD sensor layers.

This concept was the subject of a 1978 Kodak patent application (issued 1986),<ref>{{US patent | 4613895}} "[https://patents.google.com/patent/US4613895 Color responsive imaging device employing wavelength dependent semiconductor optical absorption]" Bruce C. Burkey et al.</ref> but did not result in a working image sensor.

The concept resurfaced as part of an April Fools' Day prank press release from [http://www.dpreview.com/news/0004/00040102canonccd.asp dpreview.com]. When the joke was released in 2000, a remarkably similar device was under development at Foveon—the Foveon X3 image sensor, which is multi-layered but is not a CCD. The Foveon sensor was announced on [http://www.dpreview.com/news/0202/02021101foveonx3.asp dpreview.com] in 2002, with [http://www.dpreview.com/news/0202/02021103foveonx3preview.asp sample images].

==References== {{reflist}}

Category:Image sensors

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