1. Lens types include plano-concave, plano-convex, biconvex, biconcave, meniscus, cemented, and cylindrical lenses.
2. They could be used on telescope, binoculars, collimator, optical transceiver, magnifier, alignment instrument, scanner, microscope, monitor camera, optical communication facilities, radiometer, and cryogenic instrument etc.
Please refer to the attachment.