G'day all.
I've lately been browsing the East Anglican Film Archive site
http://www.eafa.org.uk and have found a couple of brilliant films on PYE cameras:
An Eye to the Future 1952
http://www.eafa.org.uk/catalogue/733
(This one details on the PYE MK1 photicon camera including the construction of the photicon tube)
The Cambridge Story 1957
http://www.eafa.org.uk/catalogue/734
(This one features a range of PYE products and goes into excellent detail on their range of industrial vidicon cameras put into action which includes off the monitor screen shots!)