A plano concave lens is an optical lens with one concave surface and one flat surface. It has a negative focal length, and can be used for light projection, beam expansion, or to increase focal length ...

Your lens determines image sharpness, throw ratio, aspect ratio and maximum picture size. Fixed lenses are cheap and portable; zoom adds size flexibility; lens shift eases placement. Protect and clean ...

Tired of home-theater projector systems that work only in warehouse-size spaces? The latest short-throw and ultra-short-throw projectors use concave mirrors, lasers and specialized lenses to minimize ...

Plano-convex lenses is the most common type of lens element. It can be used to focus, collect and collimate light. It is also useful as a simple imaging lens where image quality requirement is not too ...

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