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RSS FeedsSensor breakthrough: Sony has developed a backlit CMOS sensor with global shutter
(Digital Photography Review)

 
 

16 february 2018 19:08:05

 
Sensor breakthrough: Sony has developed a backlit CMOS sensor with global shutter
(Digital Photography Review)
 


Sony has made something of a breakthrough in sensor development, announcing a new backside-illuminated stacked sensor that can read out every pixel simultaneously to enable global shutter. While the company has only made it work with a 1.46-million-pixel sensor so far, the nascent technology has significant potential. The sensor is able to read out from every pixel instantly because each pixel has its own analog-to-digital converter (ADC) buried in a `bottom chip,` which is stacked beneath a `top chip` containing the active, photosensitive pixels. This allows all exposed pixels to be read simultaneously, rather than sequentially row-by-row as is done with traditional CMOS sensors containing far fewer `column parallel` ADCs. This instant read-out avoids the rolling shutter distortion caused by the time delay as each row of pixels is recorded one after the other. In most existing chips, fast-moving objects become warped as they progress across the frame, because the pixels at the top of the sensor were read earlier than those at the bottom. This can also lead to banding under certain types of artificial lighting. Global shutter-reading out all of the pixels at once-solves both these problems. Shot with an exposure time of 0.56ms Sony claims its sensor is the first back-illuminated high-sensitivity CMOS sensor with pixel-parallel ADCs and a pixel-count greater than 1 million. While one million pixels may not be much good to photographers, this is a big step towards the production of a photographic quality sensor. Chips with `global shutter` need only an electronic shutter to record undistorted action pictures, boast the ability to use short electronic shutter speeds with flash, and are able to work under fluorescent and solid state (LED) lighting without banding. In the end, a global shutter sensor like this be useful for both still and movie photographers. It`s also a major improvement over current global shutter CMOS sensor ...


 
17 viewsCategory: Culture > Photography
 
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