| 摘要 |
An optical system as described in British Patent Application 2249406A using inverting mirrors has the inverting mirrors (13 and 14) disposed in a central unit that is with the mirror (14) disposed between the objective (11) and the first mirror (13). The application also describes a novel baffling system wherein the useful light near the axis of the system passes through a polarising screen (19), a retardation plate (24) twice, and another polarising screen (20) whilst stray light will bypass the retardation plate and be cut out by the cooperation of the two screens. The application also describes a binoculars-camera combination wherein a reflex type mirror (7) and a collimating lens unit (10) passes substantially collimated light to a camera (11). |
