A Charge-Coupled Device (CCD) is a technology used in cameras and imaging devices to capture light and convert it into electronic signals. It consists of an array of tiny light-sensitive cells that collect photons and generate electrical charges. These charges are then transferred across the device to create a digital image. CCDs are commonly found in digital cameras, telescopes, and scanners, providing high-quality images with excellent sensitivity and low noise. They work by using a process called charge transfer, which moves the collected charges to an output node for processing. This technology has been essential in advancing fields like astronomy and medical imaging.