The limiting spatial resolution of the intensifier is 35 line-pairs per millimeter. Both of these characteristics are essentially limited by the first stage of the intensifier tube. A lens assembly consisting of 9 components in a double Gaussian design is used to transfer the image from the output phosphor of the intensifier to the fiber-optic faceplate of the TV camera. The camera tube is a Westinghouse WX32719 low-light TV tube. During operation each diode is reverse biased.
Incoming photoelectrons generate electron-hole pairs which discharge the diodes.
An amplified charge pattern corresponding to the image is then stored in the diodes. The charge flowing in the target lead, when the scanning beam recharges the diodes, is the signal current.