Method for electrically reading a resistive target in a camera t

Details Method for electrically reading a resistive target in a camera t Method for electrically reading a resistive target in a camera t

1977-02-01

1978-07-11

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250333, 250351, H04N 533

Patent

active

041005740

ABSTRACT:
A method for electrically reading a target such as a pyroelectric one, in a camera tube. It consists in the repetition of a sequence of three phases: reading by an electron beam scanning process, compensation by secondary electron emission and levelling of the potential of the target, the duration of each of the phases being substantially equal to the duration of an analysis line of the target. The last two phases are provided for lines preceding the line read respectively by numbers p and k of lines with p<k.

REFERENCES:
patent: 3774043 (1973-11-01), Le Carvennec

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