Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1982-01-11
1983-05-17
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
350 68, 355 8, 358285, 358300, G03G 1504
Patent
active
043837557
ABSTRACT:
A self contained, demountable, unitary modular optical system for a Solid State Laser Diode Printer/Copier utilizes a folded light beam path whereby laser light is collimated through a compound four element collimating objective lens assembly, passed through a cylindrical lens focussing the beam to a horizontal line image onto the facets of a rotatable polygon mirror assembly. The beam is then passed through a cylindrical meniscus lens focussing the beam to a small dimension in the scanning or horizontal direction. A pair of cylindrical-spherical lenses with the corresponding centers of the cylindrical and spherical surfaces located near the facet of the polygon provide cross-scan focussing in the vertical direction as well as approximating a pair of toridal lenses. Horizontal and vertical spot size can thus be independently focussed.
REFERENCES:
patent: 3995110 (1976-11-01), Starkweather
patent: 4046471 (1977-09-01), Branham
patent: 4205348 (1980-05-01), DeBenedictis
patent: 4308544 (1981-12-01), Lucero et al.
Fedder Richard C.
McMahon Thomas F.
Robson Thomas
Schafner George C.
Burroughs Corporation
Fissell, Jr. Carl
Moses R. L.
Peterson Kevin R.
Rasmussen David
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