Back to results
US 4,374,617 AGranted
Multi-function document processor
AssigneeXerox Corporation
InventorTibor Fisli
Life of this patent
Estimating the term…
Abstract
A rotating polygon-type laser scanning subsystem is integrated with a photocopying subsystem to provide a relatively high quality, economical and compact multi-function document processor. To optimize the performance of the document processor, the laser scanning subsystem preferably is a symmetrical, double pass, underfilled system, and the photocopying system preferably is a light/lens xerographic system. Shared optics are used to reduce the cost, complexity and size of the document processor.
Claims11
In a multi-function document processor for selectively performing photocopying and raster scanning, said document processor including
- (a) a transparent platen for supporting a subject copy,
- (b) a selectively energizeable light source for illuminating said subject copy for photocopying,
- (c) another selectively energizeable light source for supplying a light beam for raster scanning, and
- (d) a photosensitive recording medium, and
- (e) imaging optics for photocopying and raster scanning, said imaging optics being optically aligned between said platen and said recording medium and having a predetermined optical axis;
- the improvement comprising
- (i) a reflective, multi-faceted rotating polygon for cyclically scanning said light beam through a predetermined scan angle during raster scanning, and
- (ii) means aligned with the optical axis of said imaging optics in a tangential plane and displaced from said axis in a sagittal plane for applying said light beam to said polygon for raster scanning;
- (iii) said imaging optics being selected to focus said light beam on said polygon and to refocus said light beam on said platen or on said recording medium.
6 more elements
Dependencies are inferred from the claim text.