Polygonal cylinder for use in optical picture scanning systems

Details Polygonal cylinder for use in optical picture scanning systems Polygonal cylinder for use in optical picture scanning systems

1979-07-10

1981-06-16

Evans, F. L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250334, 250347, G02B 2717

Patent

active

042734100

ABSTRACT:
An optical system for scanning thermographic pictures comprises a rotating polygonal cylinder for line scanning in one coordinate direction. The polygonal cylinder is subdivided into an inner stationary solid cylindrical portion and a ring surrounding the cylindrical portion. The ring is on its outer side provided with the polygonal faces and rotates around the cylindrical portion. The cylindrical portion has a single curved face extending substantially perpendicular to the optical axis. The inner wall of the ring and the curved face define between them a cylindrical air lens element. The shape of the curved face is computed in accordance with the image distortions of the optical system so that the air lens compensates for the image distortions.

REFERENCES:
patent: 2288079 (1942-06-01), Fitz
patent: 2972280 (1961-02-01), Kudar
patent: 3539251 (1970-11-01), Husted et al.

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