METHOD AND DEVICE FOR OBSERVATION OF REMOTE OBJECTS Russian patent published in 1998 - IPC

FIELD: optical instruments, in particular, observing equipment with zoom facility (for example, binoculars, telescopes, distance meters, sights, geodesic equipment). SUBSTANCE: image displaying method involves multiple passing (one, two, ..., n times) of beams between lens and ocular. Corresponding device has mirror lens and ocular. Other claims of invention disclose device design in which additional mirror is located in center of lens. EFFECT: simplified design, increased zooming range (zoom factor of 1.5 to 100 and more) under constant size of device, which length is shortened. 10 cl, 18 dwg