Method and apparatus for eliminating lag in photoelectric tubes

Details Method and apparatus for eliminating lag in photoelectric tubes Method and apparatus for eliminating lag in photoelectric tubes

1984-03-27

1986-07-01

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, H01J 2956

Patent

active

045982350

ABSTRACT:
For each magnitude of charge stored on a section of a target of a photoelectric tube due to the action of incident light thereon, there is a specific value of cathode voltage which ensures the discharge of the section in one pass of the scanning beam. It follows that if the cathode receives a voltage whose instantaneous value is proportional to the magnitude of the charge stored on the corresponding portion of the target, the complete discharge of the target is effected in one pass of the scanning electron beam. Since the output voltage of a camera preamplifier at any instant is directly related to the magnitude of the charge stored on the corresponding portion of the target of the same tube or a different tube viewing the same scene, the preamplifier output voltage herein is selectively applied to the tube cathode, preferably with an appropriate transfer function, whereby lag in the tube is eliminated.

REFERENCES:
patent: 3534168 (1970-12-01), Van Lookeren
patent: 3715490 (1973-02-01), Okada

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