"Photo-optical" refers to technologies and processes that involve the interaction of light with optical systems. This field combines principles from both photography and optics to manipulate light for various applications, such as imaging, sensing, and communication. In photo-optical systems, light is used to capture images or transmit information through optical fibers. These systems are essential in devices like cameras, microscopes, and fiber-optic communication networks, where precise control of light is crucial for performance and clarity.