Document scanning apparatus

Details Document scanning apparatus Document scanning apparatus

1982-03-08

1983-12-20

Britton, Howard

Facsimile and static presentation processing

Facsimile

Recording apparatus

355 8, 355 67, 358294, 362217, 362347, H04N 124

Patent

active

044221002

ABSTRACT:
An illuminator for a traveling scanner of a document scanning system is disclosed. The illuminator comprises an elliptic-cylindrical surface of about one-half an ellipse in section with a line light source lamp located on one elliptic focal line. The illuminator is positioned so that the line of a document being copied is located at the other elliptic focal line. A reflecting cylindrical light baffle is positioned over the lamp to reflect light that would otherwise not strike the elliptical reflecting surface back through the source and onto the elliptical reflecting surface. The open end of the ellipse is covered with a heat filter to protect the material being copied. The ellipse is set at a relatively small angle, and a perpendicular reflection of material from the document being copied passes through a slot in the heat filter and a slot in the base of the ellipse for further sensing.

REFERENCES:
patent: 3302519 (1967-02-01), Young
patent: 3947115 (1976-03-01), Hamaguchi
patent: 4095881 (1978-06-01), Maddox
patent: 4239383 (1980-12-01), Peterson
patent: 4259711 (1981-03-01), Mochizuki
patent: 4273441 (1981-06-01), Nagoshi
IBM Technical Disclosure Bulletin, vol. 14, No. 11, pp. 3236-3237, by Baxter et al., dated Apr. 1972.

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