venerdì 7 agosto 2015

piccolo è bello, ma non troppo: Samsung S5K3P3

Nella continua riduzione dei pixel abbiamo varcato le soglie della fisica quantistica, soprattutto quando la luce è poca e l'aumento della sensibilità genera artefatti. Per i sensori da 16MP (bandiera irrinunciabile per il marketing attuale?) Samsung passa da 1,12 a 1,00μm (-10% nella dimensione del pixel = -25% nella superficie dello stesso) per ridurre lo spessore del chip ed evitare protrusioni nelle sagome degli smartphone ...


Samsung has announced the start of mass-production of its S5K3P3 image sensor for mobile devices. The new chip is thinner than previous generations, allowing for the design of thinner, more compact, camera modules. At under 5mm thickness, these new modules can be used in ultra-thin smartphones without resulting in protruding cameras as we've seen on some of the latest Samsung Galaxy models.

The slimming is achieved by reducing the size of each individual pixel. They now measure 1.0 micron compared to 1.12 micron in the sensors that are being used in the Galaxy S6 or Note 4. Samsung says that despite the smaller photosites, sensor performance is just as good as on previous models and conventional sensors with 1.12 micron photosites. The new chip also uses Samsung's ISOCELL technology which reduces color crosstalk of neighboring pixels and increases the chief ray angle by adding physical barriers between each pixel.

While it's impressive that Samsung is capable of designing and manufacturing such small sensors and camera modules, generally smaller pixels mean a reduction in sensor performance. So future buyers of an ultra-thin 'camera-hump-less' Samsung smartphone should be aware that they might be trading off some image quality for a sleeker device. Of course, we won't know if there is an image quality tradeoff until we hold one of the new devices in our hands. The new sensor may even make its debut in the Galaxy Note 5, which is expected to be launched on August 13.

Il vero caposaldo sono i 4K (3940 x 2160) e, per immagini migliori, speriamo in una futura generazione di sensori da 8,5MP con superficie doppia del singolo pixel, già molto sovrabbondanti per una visione su un monitor QHD (2560 x 1440). La maggior parte degli scatti nel mio Samsung S6 sono a 6MP (3264 x 1836) nel formato 16:9 e 8MP (3264 x 2448) a 4:3.

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