Method and lens for producing a wide angle image

Details Method and lens for producing a wide angle image Method and lens for producing a wide angle image

1984-10-01

1987-07-21

Corbin, John K.

350128, 350452, G02B 1308, G02B 308, G03B 2160

Patent

active

046814051

ABSTRACT:
A method and anamorphic viewing lens is disclosed for producing a wide angle television or other CRT screen display, which display is expanded along the horizontal axis to allow increased visual information content or to change the aspect ratio for television viewing of wide screen motion pictures. The method includes the step of producing a width-compressed record of a field of visual features, displaying the width-compressed video record on a television or other CRT screen, which display is viewed through a single axis anamorphic viewing lens according to the invention to produce a width-expanded image of the television screen displayed record. The width-compressed video record is produced in several ways including filming a scene through an anamorphic lens system; recording the scene through a second reverse geometric version of the anamorphic lens according to the present invention; or by electronic processing of the video signal data. Alternatively, the anamorphic record may be projected through a single axis anamorphic lens for direct viewing of a width-expanded image. The single axis anamorphic lens comprises an eschelon lens formed by a sheet of optically transparent material having a series of parallel, vertical sawtooth grooves formed into one face, which increase nonlinearly in angularity from the center of the lens to the outer lateral edges.

REFERENCES:
patent: 2824396 (1958-02-01), Thomas
patent: 3644037 (1972-02-01), Larraburu
patent: 3761162 (1973-09-01), Hall
patent: 3820873 (1974-06-01), Radington et al.

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