The XQ3457R is a camera pick-up tube. The R denotes red sensitivity and Green and Blue versions were made and three would be used in professional colour cameras. The type is a diode gun Plumbicon. Plumbicon refers to the lead oxide target that was originally developed by Philips.
Plumbicon tubes were characterised by a high signal to noise ratio and were much used for medical imaging. The diode gun was used to achieve a high beam reserve and enhanced resolution. The basic Plumbicon was slightly inferior to the image orthicon in resolution. The diode gun has a modulator that is held at a small positive potential.
This image shows this miniature tube within the scanning assembly. The target connection is at the front and contains the initial signal amplifier - a MOSFET.
The scanning assembly is 38 mm in diameter. The gold fingers make contact with the target output contact.
The base and coil connections.
Here the tube has pulled out of the scanning coils. The white ring is part of target system and insulates the amplifier ring from the coils.
The faceplate with the target connector at the top.
The base and gun components.
The thin glass tube envelope is 18 mm in diameter, and excluding the base pins is 74 mm tall.