Ellipsoidal lenses are optical devices shaped like an ellipse, designed to focus light efficiently. They are commonly used in various applications, including theater lighting, projectors, and cameras. Their unique shape allows them to direct light into a narrow beam, enhancing brightness and clarity. These lenses can be made from glass or plastic and are often coated to reduce glare and improve transmission. The design helps minimize distortion, making them ideal for creating sharp images. Ellipsoidal lenses are essential in both professional and consumer optics, contributing to improved visual experiences.