A new kind of sensor having a total of 36 different color layers is developed at the University of Granada. Its working is same as that of the Sigma Foveon sensor the only difference is that the Sigma uses only three layers (Red-Green-Blue), layered vertically one after one. The currently available Sigma and Bayer sensors extract the information from only one of these colours (RGB) in each pixel within the image. It is important to apply algorithms to extract the information from the rest of the colour in the pixel, however these algorithms and procedures are kept secrets of the manufacturing companies.
“Transverse Field Detectors (TFD)” is the name given to this new 36 layered sensor and these can obtain up to twelve times more information than the human eye!
According to the PI in this group, Miguel Ángel Martínez Domingo:
“the new sensors developed at the Polytechnic University of Milan are called Transverse Field Detectors (TFD) and they are capable of extracting the full colour information from each pixel in the image without the need for a layer of colour filter on them.
In order to do so, they take advantage of a physical phenomenon by virtue of which each photon penetrates at a different depth depending on its wavelength, i.e., its colour. In this way, by collecting these photons at different depths on the silice surface of the sensor, the different channels of colour can be separated without the necessity of filters.”
However there is no information available regarding the use of these kinds of sensor into a real mass production camera.