Sony has managed to develop a groundbreaking backside-illuminated sensor. The 1.46 megapixels sensor also has a global shutter. While the image resolution doesn’t sound that impressive, the main highlight of this innovative creation by Sony is its global shutter. The resolution will also improve drastically within a short period of time, reported Camera Jabber.
Global shutter is essentially a sensor, which can capture a picture by exposing from every pixel at once.
Backside illumination, on the other hand, is a design of the image sensor, which makes use of its arrangement of imaging elements in order to increase the captured light. This leads to the camera’s enhanced low-light performance.
Sony a7R II had become the world’s first back-illuminated full frame camera with 35mm lens.
Last year, Nikon had released D850, which had 45+ megapixel BSI sensor.
The latest sensor by Sony can read every pixel at the same time due to its ‘stacked’ design. It includes a top chip with active pixels. Below that, there is a bottom chip, which carries an analog-to-digital converter. The converter is connected to every pixel in the photo-sensitive top chip.
In simple words – mostly all the CMOS image sensors make use of rolling shutters, which means that the sensor is capable of scanning your scene from top to bottom. Sony’s latest global shutter, on the other hand, as well as Panasonic’s new 8K global shutter sensor scans the entire frame simultaneously.
“The new Sony sensor comes with newly developed low-current, compact A/D converters positioned beneath each pixel. These A/D converters instantly convert the analog signal from all the simultaneously exposed pixels in parallel to a digital signal to temporarily store it in digital memory. This architecture eliminates focal plane distortion due to readout time shift, making it possible to provide a Global Shutter function*1, an industry-first for a high-sensitivity back-illuminated CMOS sensor with pixel-parallel A/D Converter with more than one megapixel*3. The inclusion of nearly 1,000 times as many A/D converters compared to the traditional column A/D conversion method*2 means an increased demand for current. Sony addressed this issue by developing a compact 14-bit A/D converter which boasts the industry’s best performance*4 in low-current operation,” said Sony.