Optical inspection is a method used in manufacturing industries to assess the quality of products. It involves the use of various optical technologies such as cameras, lasers, and sensors to detect defects, measure dimensions, and verify the correctness of a product. Optical inspection systems can be used to inspect surfaces, structures, and assemblies without physical contact, making them ideal for high-speed and non-destructive quality control processes. This technology is widely used in industries such as electronics, automotive, pharmaceuticals, and aerospace to ensure products meet quality standards and specifications.