Iconoscope development

[Steve McVoy]

This is a 1850 Iconoscope, which is about 6 inches in diameter. The thing in front is a lens, focusing an image on the mosaic plate at the rear of the iconoscope. The electron gun (not visible) is located at the bottom of the small diameter tube, and the deflection coils are located at the top of this tube. The white line going from the deflection coils to the mosaic plate is a depiction of the electron beam, probably added to the photograph when the negative was printed.