Vidicon and Plumbicon X-Ray T.V.
Camera Tubes
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X-Ray fluoroscopy practically started in the
late forties or early fifties with the short-lived, expensive and cumbersome
combination of Image Orthicon pick-up tubes
(RCA) adapted to a sophisticated mirror-optical system (CINELIX), but it became popular and practical only later
in the fifties with the introduction of the image
intensifier which, combined with Vidicon
pick-up tubes through dedicated optical systems,
gave bright dynamic fluoroscopy pictures, although they suffered from some
image lag and trailing artifacts. The Plumbicon pick-up tube, introduced by
Philips in the sixties, offered higher resolution with less lag and less trailing
artifacts than the Vidicon and became practically, and until lately, the
standard in vascular x-ray practice. In the
Nineties, CCD’s (charge coupled devices) started replacing TV pick-up
tubes and are now considered as the “state of the art” technology. Note the different colours of the optical
input face-plate of the tubes pictured above. They have standard diameter
sizes of 1, 2/3 and 1/2 inches. The largest tube in the picture is
7.5”(17.5cms) long and the smallest, 4” (10cms). The large tube and the three
next tubes are Plumbicons (made by Philips). The other tubes are Vidicons or
similar variants of different makes (Saticon, Newvicon,
etc). In the
x-ray picture below, the upper and middle tubes are Plumbicons. The lower one
is a Vidicon. Interesting link : http://www.crtsite.com/page4.html |
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