US3783299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray image intensifier input phosphor screen and method of manufacture thereof
Assignee: General Electric Co
•
Filing: 1972-05-17
•
Granted: 1974-01-01
•
Expires: 1992-05-17
Abstract
Abstract The surface of a waffle-like metal substrate forms an array of cells for the support for the input phosphor screen of an x-ray image intensifier tube. The hollow projecting walls of the metal surface substantially reduce degradation of image resolution due to lateral scattering of light in the phosphor and thereby permits use of a thicker phosphor screen for higher x-ray absorption and, or higher image resolution. The method of fabricating the phosphor screen includes the intermediate steps of forming rubber and plastic replicas of a metal master of the waffle surface. The plastic replicas are nickel plated to form low cost metal replicas with the plastic being dissolved whereby the projecting walls are hollow.
Inventors
- 👤 J Houston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:28
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
28 words
The x-ray image intensifier phosphor screen set forth in claim 1 wherein the metallic substrate member layer is of thickness in the range of 0.0002 to 0.0005 inch.
Claim 2
Dependent Claim
20 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said metallic layer is formed of nickel.
Claim 3
Dependent Claim
51 words
The x-ray image intensifier input phosphor screen set forth in claim 3 wherein the major portion of the second side of said metallic substrate member is connected to the inner surface of said face plate by means of a thin uniform thickness layer of silicone resin for bonding the adjoining surfaces.
Claim 4
Dependent Claim
20 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said face plate is fabricated of aluminum.
Claim 5
Dependent Claim
20 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said face plate is fabricated of glass.
Claim 6
Dependent Claim
24 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said face plate is fabricated of a low atomic number metal.
Claim 7
Dependent Claim
19 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said phosphor layer comprises cesium iodide.
Claim 8
Dependent Claim
21 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said phosphor layer comprises a transparent phosphor material.
Claim 9
Dependent Claim
38 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein said phosphor layer comprises a granular phosphor of large grain size of particle diameter greater than 0.3 mil to thereby obtain high light transmission characteristics.
Claim 10
Dependent Claim
29 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the floor portions on the first side of said metallic substrate member each being square shaped.
Claim 11
Dependent Claim
36 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the floor portions on the first side of said metallic substrate member form equal size squares separated by equal size said wall-like projections.
Claim 12
Dependent Claim
29 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the floor portions on the first side of said metallic substrate member each being hexagon shaped.
Claim 13
Dependent Claim
36 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the floor portions on the first side of said metallic substrate member form equal size hexagons separated by equal size said wall-like projections.
Claim 14
Dependent Claim
22 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the wall-like projections each extend outward approximately 10 mils.
Claim 15
Dependent Claim
26 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the wall-like projections each have an outer width dimension of approximately 0.5 mils.
Claim 16
Dependent Claim
36 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the floor portions on the first side of said metallic substrate member each have a width dimension of approximately 5 to 6 mils.
Claim 17
Dependent Claim
29 words
The x-ray image intensifier input phosphor screen set forth in claim 14 wherein the hexagon shaped floor portions each having a width dimension of approximately 5 to 6 mils.
Claim 18
Dependent Claim
30 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the wall-like projections of said metallic substrate member extend into the phosphor layer at least halfway therethrough.
Claim 19
Dependent Claim
29 words
The x-ray image intensifier input phosphor screen set forth in claim 1 wherein the wall-like projections of said metallic substrate member extend through approximately 80% of the phosphor layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |