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Prototype Fujifilm sensor is three times more sensitive than current sensors - The new sensor uses a similar concept to the Foveon sensor. Different layers of light sensitive material react to each primary colour of light at each photosite, resulting in greater colour depth.
The new sensor technology is reported to consist of three layers of organic pigments, each separately reacting to red, green and blue light. The layers are sandwiched between transparent electrodes from which electric current flows when light enters the corresponding pigment layer.
Fujifilm has already made a prototype image sensor using a pigment that reacts to green light. It produces monochrome pictures with the same depth as colour photographic film and is three times more sensitive than current digital image sensors. Work has already started on making prototype elements for the red and blue layers as well.
A patent has already been filed for the technology, and Fujifilm hope that it will be available in three to four years.