Fujifilm’s First Stacked, Again-Illuminated, X-Trans Sensor Coming in 2022


Fujifilm has introduced that it’s at the moment growing a brand new flagship digital camera that may function the corporate’s first back-illuminated, stacked layer X-trans CMOS sensor.

The corporate has mentioned that to rejoice the tenth anniversary of the X-system, it plans to convey out not solely new lenses (which had been introduced as a part of a lens roadmap) however will even launch a brand new flagship digital camera that options the corporate’s first mixture stacked layer and backside-illuminated X-trans CMOS sensor.

Whereas Fujifilm’s present fourth-generation 26.1-megapixel picture sensor that’s featured within the X-T30, for instance, is already backside-illuminated, the corporate has by no means used a stacked construction earlier than.

Again-illuminated, additionally referred interchangeably as backside-illuminated or BSI, sensors are a sort of picture sensor that makes use of an association of imaging parts that improve the quantity of sunshine captured and due to this fact enhance low mild efficiency. Typical front-side illuminated sensors are constructed equally to how a human eye works with a lens in entrance and the photodetectors within the again. Whereas simpler and less complicated to fabricate, the best way the components that make up the sensor are organized will really trigger a number of the mild that hits it to replicate again outwards and scale back the quantity of sunshine sign that it’s able to really recording to make a picture.

Picture by Cmglee, CC BY-SA 4.0

In distinction, again illumination rearranges the identical parts behind the photocathode layer in order that the wiring not is in entrance, which improves the light-gathering capabilities from about 60% effectivity to over 90%.

A stacked CMOS is taken into account a next-generation backside-illuminated sensor and was first developed by Sony in 2012. On this design, the supporting circuitry that was moved behind the photodiodes in an ordinary backside-illuminated sensor are additional moved beneath the energetic pixel part and provides a further 30% enchancment to mild gathering functionality. As a result of components have been rearranged on a stacked CMOS sensor, designers can do extra with the area. Sony, for instance, has constructed RAM straight into the sensor which has resulted in dramatically improved readout speeds, a system that has allowed the Alpha 7R IV, Alpha 9 II, and Alpha 1 cameras to carry out extraordinarily quick frames per second bursts at ever-increasing resolutions.

Typically talking, this sensor design doesn’t enhance picture high quality however as a substitute focuses the advantages at pure pace of information switch.

Within the case of Fujifilm, the corporate hasn’t indicated how a lot decision must be anticipated out of what’s prone to be the fifth-generation X-trans sensor, however even when the corporate chooses to stay across the mid-20-megapixel vary, the efficiency positive factors from including that stacked design will very seemingly be appreciable when in comparison with the fourth-generation sensor at the moment out there.


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