3 Layer Image Sensor
A Canon patent was recently released showing a 3 layer sensor. Sigma has been the leader (I use the term lightly) in this type of sensor design when they purchased Foveon.
Patent Publication No. 2011-129785
2011.6.30 Release Date
2009.12.18 filing date
Canon patent
Back-illuminated imaging device
Plurality of light receiving portion is provided in the order BGR
In one pixel, the charge collection in the center section, provided the charge read to the end
Focusing capabilities of the microlenses, light in the center of the charge collection has increased, the charge read out at the end of the light is reduced
Therefore, in reading the charge of B, it becomes difficult to receive light G, to prevent mixing
Widest area of B. By mixing pixels with narrow spacing of the pixels (light receiving portion for receiving the G colored in B) to prevent
Read the charge and B matches the central microlens. And easy to read the charges received by B, to prevent mixing
Improve performance by preventing the mixing color separation
