Pick-up tube having bias lighting and controls therefor

摘要

A vacuum envelope contains a photoconductive target at one end and a tubular anode electrode having light scattering properties. Light is uniformly reflected onto the target by the anode electrode from a light source mounted on the other end of the tube, outside the evacuated envelope. This uniform illumination tends to reduce build-up and decay lags at low level operating conditions. The light source is removably secured to the tube on a ceramic board incorporating an electric circuit connected to the light source for adjusting and controlling the bias light intensity.