A CCD sensor, or Charge-Coupled Device sensor, is a type of image sensor used in cameras and other imaging devices. It converts light into electrical signals, allowing for the capture of high-quality images. CCD sensors are known for their excellent light sensitivity and low noise levels, making them ideal for low-light photography. These sensors work by transferring charge across the chip to a readout node, where the signal is processed. CCD sensors are commonly found in professional cameras, telescopes, and medical imaging equipment, providing clear and detailed images in various applications.