The museum has a CV148 IR image converter and also the paper by Tom Pratt. Tom was my boss at the end of the war, when I graduated. They were called RG tubes to keep their use secret, and RG stood for raiogram.
It was a very simple tube, not useful for good imaging except in the centre of the field of view, but it was simple to make, and the UK used it a lot. The US and Germany concentrated on tubes with electrostatic focus, which gave a much better image, but the construction was so difficult they were never used in anger. The RG tube was.