MULTIPATH OPTICAL SYSTEM Russian patent published in 1996 - IPC

FIELD: optical instrument engineering. SUBSTANCE: optical system has two concave mirrors- objectives turned to each other with their reflecting surfaces, and two concave mirrors-collecting lenses. Radius of curvature of the first mirror-collecting lens is equal to radius of curvature of the first mirror-objective. Radius of curvature of the second mirror-collecting lens is equal to radius of curvature of the second mirror-objective. The first mirror-collecting lens is mounted at focal point of the first mirror-objective and turned with its reflecting surface to reflecting surface of the first mirror-objective. The second mirror-collecting lens is mounted at focal point of the second mirror-objective and turned with its reflecting surface to reflecting surface of the second mirror-objective. The third mirror-objective, the third mirror- collecting lens, mirror and acoustic-optical modulator are introduced into the device additionally. Mirror and acoustic-optical modulator are mounted between the first and the second mirrors-objectives. The third mirror-objective is turned with its reflecting surface to the reflecting surface of the second mirror-objective. The third mirror- collecting lens is disposed at focal point of the third mirror-objective and turned with its reflecting surface to reflecting surface of the third mirror-objective. EFFECT: improved efficiency. 4 cl, 8 dwg