Pick-up tube having light controllable furcated light pipes

Details Pick-up tube having light controllable furcated light pipes Pick-up tube having light controllable furcated light pipes

1978-10-20

1981-03-31

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

350 9610, H01J 3138, G02B 514

Patent

active

042596092

ABSTRACT:
A light conductor is utilized in a vidicon type pick-up tube to transmit light from a light source to the tube target for biasing the dark current of the target. The light conductor is preferably a bifurcated glass rod having a stem and two branches defining a crotch region. The light that is transmitted through the stem into the branches is selectively attenuated by filling in the crotch region with either glass redistributed from portions of the stem and branches or with additional glass. By controlling the light transmission with predetermined amounts of glass, the illumination and, hence, the dark current of the target can also be controlled.

REFERENCES:
patent: 2506672 (1950-05-01), Kell et al.
patent: 3217292 (1965-11-01), Henderson
patent: 3352277 (1967-11-01), Schmidt
patent: 3628076 (1971-12-01), Weijland et al.
patent: 3751703 (1973-08-01), Weijland et al.
patent: 3978365 (1976-08-01), Limper

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