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Panasonic Long-Range ToF Sensor Article

Nikkei publishes an article on Panasonic 250m-range ToF solution, first presented 2 months ago.

"Panasonic Corp developed a range image sensor that can take an image of a 10cm object located 250m away in the dark. [there is no info on the range and resolution in a bright sunlight - ISW]


In the field of autonomous driving, the company considers that the sensor can supplement the functions of existing sensors because the new sensor (1) supports a longer distance than LiDAR (light detection and ranging), which enables to obtain range images, and (2) can take images in the complete dark unlike CMOS image sensors.

Panasonic expects to start to ship samples in fiscal 2019 and begin volume production in fiscal 2021.

...the new sensor uses a principle similar to the principle of flash-type LiDAR. In other words, near-infrared-light pulse (wavelength: 940nm, output: 1,200W, pulse width: 10ns, GaAs-based laser device in the case of the prototype) is applied to the entire imaging area.

With the prototype, near-infrared pulse is emitted with a cycle of 167μs to measure distance for each distance range. Based on a calculation conducted by Panasonic, when the viewing angle of the prototype is set at 20°, the number of photons coming from a distance of more than 100m away and entering one pixel is 1 or less. Therefore, in the case of a distance from which the number of incoming photons becomes 1 or less, measurement is carried out several times for the same distance range.
"

ToF APD sensor with 260,000 11.2μm2 pixels

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