Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1972-08-18
1976-06-01
Stolwein, Walter
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313380, 250369, H01J 3150
Patent
active
039611825
ABSTRACT:
The present invention relates in general to methods for making pick-up screens for X-ray image intensifier tubes and, more particularly, to an improved method wherein the X-ray fluorescent phosphor screen element is formed by evaporation of an alkali metal halide material in vacuum and condensing the evaporated material on an X-ray transparent portion of the X-ray intensifier tube, whereby a curved X-ray image pick-up screen is formed which has improved quantum efficiency and resolution. Such improved X-ray image intensifier tubes are especially useful for, but not limited in use to, X-ray systems and for intensifying gamma ray images obtained in applications of nuclear medicine.
REFERENCES:
patent: 1954691 (1934-04-01), De Boer et al.
patent: 2248630 (1941-07-01), Johnson et al.
patent: 2257827 (1941-10-01), Weissenberg
patent: 2264717 (1941-12-01), Ruedy
patent: 2523132 (1950-09-01), Mason
patent: 2525832 (1950-10-01), Sheldon
patent: 2585551 (1952-02-01), Hofstadter
patent: 2586392 (1952-02-01), Sheldon
patent: 2600579 (1952-06-01), Ruedy et al.
patent: 2673816 (1954-03-01), Neuhaus
patent: 2676113 (1954-04-01), Jervis
patent: 2681420 (1954-06-01), Teves et al.
patent: 2699511 (1955-01-01), Sheldon
patent: 2727863 (1955-12-01), Fonda
patent: 2789062 (1957-04-01), Cusano et al.
patent: 2798823 (1957-07-01), Harper
patent: 2890359 (1959-06-01), Heijne et al.
patent: 2898225 (1959-08-01), Rychlewski et al.
patent: 2903378 (1959-09-01), Rychlewski
patent: 2936246 (1960-05-01), Coghill
patent: 2967111 (1961-01-01), Coghill et al.
patent: 2983816 (1951-05-01), Koller
patent: 3023313 (1962-02-01), DE LA Mater et al.
patent: 3048698 (1962-08-01), Carlson
patent: 3213308 (1965-10-01), Feibelman
patent: 3356851 (1967-12-01), Carlson
patent: 3373279 (1968-05-01), Hofstader
patent: 3558893 (1971-01-01), Ball
patent: 3795531 (1974-03-01), Spicer
"C.sub.s I(NA) Scintillation Crystals" -- by Brinkman -- Physics Letters, vol. 15, No. 4, p. 305, Apr. 1965.
"On the Activation of Oxide--Coated Cathodes," by Hamaker, et al.-Phillips Res. Rep. 2, 171, (1947).
"Monochromatic -. . . " by Rosterkamp Medica Mundi, (1961), pp. 68-77.
"The Oxide--Coated Cathode," by Herman, et al., 1951, p. 113.
Albrecht, et al., X-Ray Screens With Reduced Information Losses, 5 Medici Mundi; pp. 80-84, 1959.
Aine Harry E.
Cole Stanley Z.
Pressman David R.
Stolwein Walter
Varian Associates
LandOfFree
Pick up screens for X-ray image intensifier tubes employing evap does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pick up screens for X-ray image intensifier tubes employing evap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pick up screens for X-ray image intensifier tubes employing evap will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2404159