Today may be one of those days where the photo gives a small step that can bring about a radical change. Panasonic has presented to society its new sensor OPF (Organic Photoconductive Film); This sensor has been developed by Fujifilm, offers a dynamic range in acquisition signal of 123 dB, which is equivalent to one sensitivity 100 times greater than the CMOS biass while maintaining the same sensor size.
Photodiode and circuitry, separated
One of the major milestones that Panasonic communicates is that these organic sensors have two parts clearly differentiated: photodiode that captures light and converts it to an electrical signal, and the circuitry that processes these electrical signals.
In a conventional sensor, Silicon photodiode shares its space with the circuitry processing the electrical signal of the photodiode. In a sensor backlit (BSI), the photodiode is located at the top and the circuitry below slightly improving sensitivity. In these new organic sensors (OPF), the photodiode and the circuitry are completely independent so it has been able to work in these parts to improve their effectiveness.
Along with the change in construction, these new photodiodes have been increasing 10 times over the conventional CMOS optical absorption coefficient. This implies that the sensor will need more signal to become saturated and will continue to receive information where other sensors have already reached the value 0 or 255 and ‘clippean’ the black or white.
much thinner and the increase the uptake of the light angle. If on a backlit sensor sample arrived in the 40th as much as, in the case of the OPF will reach the 60th. By pure logic, increasing the information reaching the photodiode, the sensitivity is increased in dark environments and the image is processed better. Panasonic also says that components will reduce its size that will enable incorporate a high range in a compact camera sensor and it will facilitate the design of the objectives.
The dynamic range optimization
Aside from getting an improved structure, have included improvements in hardware and software to enhance and improve this sensitivity. First, find the Dual-Sensitivity Pixel Technology that incorporates two photodiodes of different sensitivities that determine the brightness of the scene. Secondly, the Capacitative-Coupled Noise Canceller Technology that will enhance the intensity of the signal with respect to the noise that is general because the digital gain.
This technology will not stay for research, but it is expected that you apply also to the range of Panasonic consumer products. We might see it in a future Panasonic GH-5?