Electronic still camera tube

Details Electronic still camera tube Electronic still camera tube

1988-05-09

1989-06-06

Ng, Jin F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358110, 250213VT, H04N 530

Patent

active

048376310

ABSTRACT:
An electronic camera tube includes a transparent envelope enclosing an evacuated cavity, a photocathode layer on a first internal surface of the envelope and an array of storage electrodes on a second internal surface of the envelope. The first and second surfaces are parallel and closely spaced. The photocathode layer emits electrons in response to an incident light intensity pattern. The storage electrodes in the array receive the electrons from the photocathode layer and emit secondary electrons, thereby accumulating a charge pattern representing the light intensity pattern. The camera tube further includes a readout device associated with each storage electrode for reading out the charge pattern during a readout phase. The readout devices operate by generating a readout current through an evacuated region adjacent to each storage electrode. Each readout current is a function of the charge accumulated on the adjacent storage electrode during the exposure phase. A number of different readout techniques can be utilized.

REFERENCES:
patent: 3353114 (1967-11-01), Hanks et al.
patent: 4059840 (1977-11-01), van de Polder et al.
patent: 4471378 (1984-09-01), Ng
patent: 4555731 (1985-11-01), Zinchuk
patent: 4727427 (1988-02-01), Kime

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