Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1993-02-12
1995-12-12
Wong, Peter S.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358474, 358484, 358505, 25022726, 250229, H04N 140, H04N 104, H04N 146, H01J 516
Patent
active
054754950
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention refers to the field of electronic reproduction technology and is directed to a device for point-by-point and line-by-line optoelectronic scanning of image originals, referred to as contone originals and/or originals having script and line elements, referred to as line originals.
In such scanner devices, an original is scanned point-by-point and line-by-line by an optoelectronic scanner element and the scan light reflected from the original (opaque original) or the scan light allowed to pass through the original (transparency original) and modulated with the informational content of the scanned original is converted into at least one image signal. The image signal can be digitally stored for later employment or can be directly supplied to a recording device for recording a reproduction of the original.
For a contone scanning and a line scanning, i.e. for scanning contone and line originals, separate scanner devices adapted to the respective application are generally employed. Given changing applications, however, a relatively complicated refitting of the scanner device can also be undertaken in that a contone scanner system is replaced by a line scanner system or vice versa. Beyond this, the known scanner devices for scanning line originals are not adequately suited for implementing line scannings at high speed. Specific devices are respectively employed for this purpose that are adapted to the respective application.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to improve a device of the type initially cited such that a flexible employment as well as a high scan speed are guaranteed.
This object is inventively achieved in that both a contone scanner system for the implementation of a contone scanning as well as a line scanning system for the implementation of a line scanning are provided, both the contone scanning system as well as the line scanning system are fashioned as multi-channel devices and a switchover means is provided for the selective connection of either the contone scanner system or the line scanner system.
This combination of the line scanner system and the contone scanner system makes it possible to offer a uniform apparatus that can be selectively employed for contone scanning or for line scanning dependent on a specifically existing application.
The multi-channel designing makes it possible to process color image originals in a contone scanning and to additionally undertake a scanning of the surrounding field. It has been particularly envisioned in a multi-channel line scanning to simultaneously acquire a plurality of tracks and to thereby multiply the scanning speed in accordance with the plurality of channels.
In particular, it has been conceived of beyond this to design the switch over means as a positionable mirror that selectively steers the optical information in the direction to the contone scanner system or to the line scanner system, and that occludes the system that is respectively not to be employed so that no signal falsification can ensue due to stray light effects or due to a processing of the optical information both with the line scanner system as well as with the contone scanner system.
In order to guarantee a compact structure, it is possible to undertake a conversion of the optical information into electrical information with multipliers to which both the output signals of the contone scanner system as well as the output signals of the line scanner system are supplied. An especially economical embodiment can be realized in that groups of four multipliers are employed in a standard embodiment for contone scans, and a respective channel for the line scanning is allocated to each of the multipliers.
It is proposed in a further, preferred embodiment that a varifocal lens is arranged in the line scanner system, this varifocal lens enabling an adaptation to different track widths during scanning in a simple way. Given a varifocal lens having a range of adjustment of, for example, 1:10, it is possible
REFERENCES:
patent: 3708670 (1973-01-01), Back
patent: 3956587 (1976-05-01), Nelson
patent: 4189752 (1980-02-01), Moe et al.
patent: 4424589 (1984-01-01), Thomas et al.
patent: 4473848 (1984-09-01), Juergensen
patent: 4487482 (1984-12-01), Itoh et al.
patent: 4558214 (1985-12-01), Fujii et al.
patent: 4616226 (1986-10-01), Morley
patent: 4680642 (1987-07-01), Shimano et al.
patent: 4777525 (1988-10-01), Preston, Jr.
patent: 4816922 (1989-03-01), Futaki
patent: 5019703 (1991-05-01), Boyd et al.
Patent Abstracts of Japan, vol. 012377 dated Jul. 10, 1988, "Copying Device Used for Both Full Color and Black-and-White", Mizuma Kenichi et al.
Patent Abstracts of Japan, No. JP63124065 dated May 27, 1988, Mizuma Kenichi et al "Copying Device used for Both Full Color and Black-and-White".
Frahm Eric
Linotype-Hell AG
Wong Peter S.
LandOfFree
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