US4236077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image intensifier
Assignee: Toshiba Corp
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Filing: 1978-08-24
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Granted: 1980-11-25
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Expires: 1998-08-24
Abstract
Abstract An input screen of an image intensifier comprises an aluminum substrate with electrochemically deposited netty protrusions, a phosphor layer formed on the substrate and including a large number of columnar blocks defined by cracks extending from the tops of the netty protrusions toward the surface of the layer, and a photocathode deposited on the phosphor layer directly or through a protective layer.
Inventors
- 👤 Tomiya Sonoda
- 👤 Hiroshi Washida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:18
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J31/00; H01J31/08; H01J31/50; H01J31/501
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
An image intensifier comprising an input screen converting a radiation image into an electron image; an electro-optical system accelerating and focusing the electron image and an output screen converting the accelerated and focused electron image into a visible light image, wherein at least one of the input screen and the output screen comprises; a substrate; a plurality of electrochemically deposited netty protrusions on at least one surface of the substrate and a phosphor layer formed on the substrate having cracks extending from the tops of the netty protrusions toward the surface of the phosphor layer and a plurality of columnar blocks defined by the cracks.
Claim 2
Dependent Claim
105 words
An image intensifier comprising an input screen converting a radiation image into an electron image; an electro-optical system accelerating and focusing the electron image and an output screen converting the accelerated and focused electron image into a visible light image, wherein at least one of the input screen and the output screen comprises; a substrate; a plurality of electrochemically deposited netty protrusions on at least one surface of the substrate and a phosphor layer formed on the substrate having cracks extending from the tops of the netty protrusions toward the surface of the phosphor layer and a plurality of columnar blocks defined by the cracks.
Claim 3
Dependent Claim
15 words
An image intensifier according to claim 1, wherein the substrate is of electrically conductive material.
Claim 4
Dependent Claim
17 words
An image intensifier according to claim 1, wherein the substrate of the input screen is of aluminum.
Claim 5
Dependent Claim
24 words
An image intensifier according to claim 1, wherein the substrate of the output screen is of glass having an transparent and electrically conductive surface.
Claim 6
Dependent Claim
20 words
An image intensifier according to claim 1, 2, 3 or 4, wherein the electrochemically deposited netty protrusions are of metal.
Claim 7
Dependent Claim
28 words
An image intensifier according to claim 1, 2, 3 or 4, wherein the electrochemically deposited netty protrusions are of a material selected from nickel, gold, copper and chromium.
Claim 8
Dependent Claim
23 words
An image intensifier according to claim 1, 2, 3 or 4, wherein the electrochemically deposited netty protrusions are interceptive walls for luminous light.
Claim 9
Dependent Claim
41 words
An image intensifier according to claim 7, wherein the height of the interceptive walls is nearly equal to or higher than one fifth of the thickness of the phosphor layer and a quarter of the average size of the phosphor blocks.
Claim 10
Dependent Claim
20 words
An image intensifier according to claim 1, wherein a reflective layer is interposed between the substrate and the phosphor layer.
Claim 11
Dependent Claim
14 words
An image intensifier according to claim 9, wherein the reflective layer is of aluminum.
Claim 12
Dependent Claim
19 words
An image intensifier according to claim 1, wherein the phosphor layer of the input screen is of alkali halide.
Claim 13
Dependent Claim
15 words
An image intensifier according to claim 11, wherein the phosphor layer is of cesium iodide.
Claim 14
Dependent Claim
19 words
An image intensifier according to claim 1, wherein the phosphor layer of the output screen is of zinc sulfide.
Claim 15
Dependent Claim
19 words
An image intensifier according to claim 1 or 13, wherein the phosphor layer of the output screen is vacuum-deposited.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |