Phase detection

Phase detection is a technique used in cameras and imaging systems to accurately align the focus or exposure settings by comparing light signals. It works by analyzing the timing (phase) of light waves or signals to determine if the subject is in focus or if adjustments are needed. In autofocus systems, phase detection quickly measures the difference between light coming from different parts of the lens to adjust focus precisely and swiftly. This method enhances the speed and accuracy of focusing, resulting in sharper images, especially in dynamic or fast-moving scenes.