Title: X-ray conversion screens

Abstract: An X-ray conversion screen having reduced afterglow without any appreciable loss in the brightness under X-ray excitation comprises a substrate and at least one fluorescent layer applied thereto, the fluorescent layer containing a fluorescent substance which comprises terbium-activated lanthanum or gadolinium oxyhalide having yttrium or lutetium and, as desired, ytterbium added thereto as impurities.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Watanabe, Minoru (Kawasaki, JA)
Kubo, Ryoichi (Yokohama, JA)
Nishimura, Toshio (Yokohama, JA)
Yokota, Kazuto (Yokohma, JA)

Application Number: 741109
Filing Date: 1976-11-11
Publication_date: 1977-10-18
Assignee: Tokyo Shibaura Electric Co., Ltd. (Kawasaki, JA)
Primary Class(es): 250/483.1 252/301.4H, 976/DIG439
Other Classes:
US Patent Ref:

RE28592	Oct, 1975	Rabatin	252/301.
3617743	Nov, 1971	Rabatin	250/483.
3872309	Mar, 1975	DeBelder	250/483.
4029851	Jun, 1977	Degenhardt	250/483.

Other Refs:
Primary Examiner: Dixon, Harold A.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman