Optical scanner

Details Optical scanner Optical scanner

1973-12-20

1976-03-23

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

178 76, H04N 122

Patent

active

039461505

ABSTRACT:
A flux scanner which is comprised of a rotating polygon for scanning a beam of radiated flux transverse a photoreceptive medium. In the beam path between the flux source and the polygon, an astigmatic-beam expander lens is employed to focus the flux distributions to a spot at an image plane. The astigmatic lens is configured so as to produce a very narrow beam of flux to control the size of the spot in a direction orthogonal to the transverse direction, without any loss of efficiency. Between the photoreceptive medium and the polygon, a cylindrical lens and linear optical elements are positioned to focus the beam to control the size of the spot along the transverse direction. The transverse direction is designated optically as the tangential plane; whereas the direction orthogonal to the transverse direction is designated optically as the sagittal plane. These optical elements are configured to cause the sagittal and tangential planes of best focus to coincide at the image plane even though the object effectively emanates from two separate locations.

REFERENCES:
patent: 2932236 (1960-04-01), Delano
patent: 3317267 (1967-05-01), Offner
patent: 3750189 (1973-07-01), Fleischer
patent: 3752999 (1973-08-01), Sick
patent: 3804976 (1974-04-01), Gard
patent: 3835249 (1974-09-01), Dattilo

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