MIRROR LENS Russian patent published in 1997 - IPC

FIELD: optical instruments. SUBSTANCE: device has two reinforcement spherical mirrors (named first and third), two flat mirrors and aberration compensator which is located before spherical mirrors and has flat-convex lens and negative meniscus. Concave piece of third mirror is directed towards object and is located behind first one. Flat mirrors (named as second and fourth) are joined and are located on flat bevel of central area of convex surface of negative meniscus of aberration compensator. Another claim of invention describes device design in which mirrors are located on concave and convex surfaces of positive meniscus and second and fourth mirrors are located on surface of flat-parallel plate which is directed towards object. Said flat-parallel plate is located between aberration compensator and first spherical mirror. EFFECT: increased zoom capacity. 2 cl, 4 dwg