The AR1820 is a 18.10-megapixel CMOS image sensor manufactured by On Semi. It delivers a 4912 × 3684 pixel array with a 1.25 µm pixel pitch, providing efficient photon collection at each photosite. The optical format spans a 7.675 mm diagonal with a 0.16875 aspect ratio, characteristic of 1/3-inch sensors widely used in embedded and surveillance systems. With 1.25 µm pixels, the sensor features very fine pixel pitch targeting maximum spatial resolution in microscopy and metrology systems.