Optical imaging is a technique that uses light to capture images of objects or scenes. This method relies on various technologies, such as cameras and microscopes, to visualize details that may not be visible to the naked eye. It is widely used in fields like medicine, biology, and astronomy to study structures and processes. In medical applications, optical imaging can help doctors see inside the body without invasive procedures. Techniques like endoscopy and fluorescence imaging allow for real-time observation of tissues and cells, aiding in diagnosis and treatment planning. Overall, optical imaging plays a crucial role in advancing scientific research and healthcare.