Back as CMOS/CCD EXR/CCD Supper competition!

Digital camera channel on 25 June we all know, the sensor size is what determines whether excellent imaging quality is one of the factors — the larger sensor size, a single pixel of the open rate, photosensitivity, s/n ratio and dynamic range will be increased accordingly.

So is there a way not to increase the size of the sensor can increase photosensitivity, s/n ratio and dynamic range of? the answer is Yes.

The earliest implementations is Fuji Super CCD sensor of, but the Super CCD sensor is the use of non-traditional honeycomb arranged pixel to increase the use of area and thereby increase photosensitivity, s/n ratio and dynamic range, it can be said that remains elevated sensor size.

Really perfect implementation does not increase the sensor size increase photosensitivity, s/n ratio and dynamic range of the latest integrated CMOS sensor according to the type, for use and the General method instead, no wiring layer side irradiation of light irradiation technology on the back, back, according to CMOS from metal wiring and transistors, open rates (photoelectric conversion parts in one pixel of the area ratio) can increase to nearly 100% for no additional sensor size can increase photosensitivity, s/n ratio and dynamic range.

Back photos-CMOS sensor:

In traditional CMOS sensor element, located photo diode, transistor circuit into the amount of light in the rear will be blocking are affected.

The so-called back photo-CMOS is it turns direction, light first entered the photosensitive diode, which is not subject to the metal wiring and transistors, open rates (photoelectric conversion parts in one pixel of the area ratio) can increase to nearly 100%, thus increasing low lighting conditions of the shot.

Super CCD EXR sensor:

Super CCD by Fuji company launched, it does not use conventional square diode, but uses a Octagon of diode, pixels are arranged in a honeycomb structure, and the unit size of pixels than traditional CCD.

Rotate 45 degrees pixels arranged in results can be narrowed to image capture of unwanted extra space, light set higher efficiency, efficiency increase after the photosensitivity, s/n ratio and dynamic range are increased.

Though the footsteps of Fuji has not stopped, in the last year to develop the newest generation of Super CCD EXR sensor.

New sensor using "double exposure control" that is, by controlling the different exposure times (charge accumulation time) to achieve a different speed. In this new structure, the "A" and "B" groups capture channel "has" at the same time, the final "A" and "B" group channel acquisition of image information and generate the final image. This electronic control allows image capture the highlights and low-light detail full capture. In contrast to the past, Super CCD EXR unit pixel size is exactly the same, which means that the EXR's dynamic range has been further improved.

In both of these unusual sensors are necessarily understanding, I think we all have a doubt: "back as type CMOS and Super CCD EXR sensor than ordinary CCD sensor is what's on in Imaging is different, and who better?" and I had the same question, specifically the three sensors made a comparison and wrote this article.