AERIAL CAMERA Russian patent published in 2002 - IPC

FIELD: production of photographic images of the underlying surface from flight vehicles in exploration of the natural resources of the Earth. SUBSTANCE: additional introduction of an auxiliary cylindrical lens, exposure slot with an exposure shaft, film-pulling mechanism with a photographic film, two light filters and an optical axis bend unit placed in an opaque chamber, the optical modulator is made in the form of an aperture reflecting mask with elements, measuring NxN, whose each element with number i,j is made transparent, if quantity Wal (i,j) of the Walsh function takes value +1, and reflecting, if quantity Wal (i,j) of the Walsh function takes value -1, placed in succession in the reflected luminous flux are the optical axis bend unit, auxiliary cylindrical lens, the first auxiliary light filter, auxiliary exposure slot with an auxiliary exposure shaft, and the second light filter is positioned in the passing luminous flux between the cylindrical lens and the exposure slot. EFFECT: expanded operating capacities of the aerial camera. 1 dwg