MIRROR LENS FOR MONOCULAR GLASS Russian patent published in 1998 - IPC

FIELD: optical instruments which are designed for angular measurements and project erect image. SUBSTANCE: device has three members which are located in series along beam. First member is designed as negative meniscus which concavity is directed to object, second member is designed as near-afocal meniscus which concavity is directed to image. Central region of its second surface serves as secondary mirror. Third member is designed as concave primary mirror with external reflection. EFFECT: increased functional capabilities. 2 dwg