Raster input scanner (RIS) with diagnostic mode to predict and v

Details Raster input scanner (RIS) with diagnostic mode to predict and v Raster input scanner (RIS) with diagnostic mode to predict and v

1990-09-28

1992-12-08

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Picture signal generator

358406, 358481, H04N 140

Patent

active

051702673

ABSTRACT:
A diagnostic test process is provided for a visual verification of the spatial illumination characteristics of an illumination system used in a raster input scanner (RIS) system. A calibration reference strip is illuminated by the RIS scanning lamp and the reflected image is detected by a photosensor array. The output data from the photosensor is sampled at predetermined time intervals with each sampling being displayed as a video illumination profile at a display screen. The profile is superimposed on a calibration grid with indicia which allow verification that the lamp calibration is still valid. An out of spec calibration display prompts an operator or tech rep to initiate a recalibration routine or to replace the lamps or possibly clean the optical system components.

REFERENCES:
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patent: 4647981 (1987-03-01), Froelich
patent: 4751377 (1988-06-01), Ishizaka et al.
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patent: 4853739 (1989-08-01), Miyamoto et al.
patent: 4862397 (1989-08-01), Pryor
patent: 4876605 (1989-10-01), Ishikawa et al.
patent: 4961117 (1990-10-01), Rumley

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