Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1987-03-02
1989-09-12
Arnold, Bruce Y.
Facsimile and static presentation processing
Facsimile
Recording apparatus
340713, 350393, G02F 103, G09G 302, H04N 574
Patent
active
048665290
ABSTRACT:
The invention relates to an optical relay which includes a target plate of an electrically insulating material and allowing the light to pass in a manner dependent on the electric field parallel to the direction of propagation of this light, means for scanning a first surface of this target plate by means of an electronic beam (34) controlled by a wehnelt electrode (34), an anode (38), an optically transparent plate (38) which is electrically conductive and which receives the visual information electric signal from an amplifier which supplies a video signal. The optical relay operates with a further amplifier (52) which applies a small overmodulation supplied by the video signal to the wehnelt electrode in order to enhance the readability. The overmodulation may be automatically controlled by means of a picture integrator.
REFERENCES:
patent: 2983824 (1961-05-01), Weeks et al.
patent: 3520589 (1970-07-01), Angel et al.
patent: 3637931 (1972-01-01), Donjon et al.
patent: 3878328 (1975-04-01), Marie et al.
patent: 4692758 (1987-09-01), Fawcett et al.
Polaert Remy
Tissot Maurice
Arnold Bruce Y.
Edmondson David J.
Marion Michael E.
U.S. Philips Corporation
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