The MT9M131 is a 1.31-megapixel CMOS image sensor manufactured by On Semi (Micron, Aptina). It delivers a 1280 × 1024 pixel array with a 3.6 µm pixel pitch, providing efficient photon collection at each photosite. The optical format spans a 5.901 mm diagonal with a 0.211111111 aspect ratio, in the 1/4-inch class found in compact embedded vision modules. With 3.6 µm pixels, the sensor features compact pixel pitch suited for high-resolution imaging in space-constrained camera designs.