Rare earth phosphors and phosphor screens

Details Rare earth phosphors and phosphor screens Rare earth phosphors and phosphor screens

1977-04-11

1981-10-27

Dixon, Harold A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250486, 2523014H, G01J 158

Patent

active

042975840

ABSTRACT:
This invention relates to rare earth phosphor screens for converting image carrying incident radiation to image carrying visible or near-visible radiation and to the rare earth phosphor materials utilized in such screens. The invention further relates to methods for converting image carrying charged particles to image carrying radiation principally in the blue and near-ultraviolet region of the spectrum and to stabilized rare earth phosphors characterized by having a continuous surface layer of the phosphors of the invention. More particularly, the phosphors of the invention are oxychlorides and oxybromides of yttrium, lanthanum and gadolinium activated with trivalent cerium and the conversion screens are of the type illustratively including x-ray conversion screens, image amplifier tube screens, neutron imaging screens, cathode ray tube screens, high energy gamma ray screens, scintillation detector screens and screens for real-time translation of image carrying high energy radiation to image carrying visible or near-visible radiation.

REFERENCES:
patent: 3591516 (1971-07-01), Rabatin
patent: 3617743 (1971-11-01), Rabatin
patent: 3829700 (1974-08-01), Buchanan
patent: 3872309 (1975-03-01), De Belder et al.
patent: 3891852 (1975-06-01), Bollen et al.
patent: 4054798 (1977-10-01), Watanabe
Fluorescent & Other Gaseous Discharge Lamp by Forsythe et al., Murray Hill Books (1949), pp. 47-50.

Affiliated with

Also associated with

Rating

Rare earth phosphors and phosphor screens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rare earth phosphors and phosphor screens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth phosphors and phosphor screens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-281330