The GC0309 is a 0.32-megapixel CMOS image sensor manufactured by Galaxycore Microelectronics. It delivers a 648 × 488 pixel array with a 2.5 µm pixel pitch, providing efficient photon collection at each photosite. The optical format spans a 2.028 mm diagonal with a 81:61 aspect ratio. With 2.5 µm pixels, the sensor features very fine pixel pitch targeting maximum spatial resolution in microscopy and metrology systems.