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 ...

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 ...

Projectors come in some pretty compact sizes these days, but higher quality options still come in relatively bulky packages that need to be housed somewhere. A newly announced projector from Fujifilm ...