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),[1] but did not result in a working image sensor.

The concept resurfaced as part of an April Fools' Day prank press release from 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 dpreview.com in 2002, with sample images.

References

U.S. Patent 4,613,895 "Color responsive imaging device employing wavelength dependent semiconductor optical absorption" Bruce C. Burkey et al.

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[1] U.S. Patent 4,613,895 "Color responsive imaging device employing wavelength dependent semiconductor optical absorption" Bruce C. Burkey et al.