DEVICE FOR BUILDING MONOCHROME PICTURE Russian patent published in 1998 - IPC

FIELD: optics. SUBSTANCE: device has interference filter, projecting lens incorporating concentric convex and concave mirror components, and recording system incorporating fiber-optic element connected to one or more photodetectors. All these parts are arranged along beam path. Convex component of lens is made in the form of mirror hemisphere that has annular transparent zones and is applied on external surface of hollow transparent sphere. Concave component is hemisphere with central and peripheral equal-diameter entrance holes. Number of annular transparent zones on convex component is equal to number of opposing entrance holes of concave component and, consequently, to number of interference filters installed in front of entrance holes. Filters are mounted on surfaces of concentric meniscus lenses. Common center of curvature on optical surfaces of each meniscus lens is aligned with center of respective entrance pupil. EFFECT: improved informative capacity due to enlarged angular field; improved quality of monochrome picture. 7 dwg