Flow camera for large document reproductions having lens adjustm

Details Flow camera for large document reproductions having lens adjustm Flow camera for large document reproductions having lens adjustm

1995-08-02

1997-07-01

Couso, Jose L.

Image analysis

Applications

Document or print quality inspection

382325, 355 50, 355 51, 355 70, G06K 900, G03B 2748, G03B 2754

Patent

active

056446446

ABSTRACT:
A flow camera apparatus (10) operable for photographing large original documents in continuous, moving fashion includes a camera (74) located within the housing (12). An aperture adjustment mechanism (86) allows adjustment of the camera aperture from the outside of the housing (12) without opening the housing (12). The iris adjustment mechanism also allows the aperture to be changed during photographing of a document. The apparatus includes lamps (214, 216 and 218) for illuminating the document during photographing and a "T" mask assembly 22 provided with baffles (204 and 208) for allowing only light reflected from the document to enter the image path (88) to the camera (74). The apparatus (10) also includes precisely balanced detectors (126) for detecting entry of a document into the apparatus (10).

REFERENCES:
patent: 3644036 (1972-02-01), Canfield
patent: 3980167 (1976-09-01), Tamura et al.
patent: 4303333 (1981-12-01), Mechnick
patent: 5341192 (1994-08-01), Wally, Jr. et al.
patent: 5450709 (1995-09-01), Steding

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