US3699346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-conductive image intensifiers
Assignee: US Philips Corp
•
Filing: 1970-12-07
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Granted: 1972-10-17
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Expires: 1990-12-07
Abstract
Abstract Coupling conductors are disposed in electrical contact between the input photo-conductive layer and the output electroluminescent layer of a photo-conductive image intensifier panel so that the photo-conductive layer acts only to an extremely small depth of light penetration and therefore photo-current occurs mainly at the input surface of the photo-conductive layer and is then conducted directly to the electroluminescent layer, avoiding the severe attenuation of the photo-current when it must pass through the thickness of the photo-conductive layer.
Inventors
- 👤 Mervyn Geoffrey Harwood
- 👤 John Schofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H10; H10F; H10F55/00; H10F55/10; H10F55/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
A panel as claimed in claim 1 wherein the said conductive plates reflect light from the EL layer in addition to being opaque thereto so as to improve the luminance of the output image.
Claim 2
Dependent Claim
29 words
A panel as claimed in claim 1 wherein the input electrode lies against the input face of the photo-conductive layer which layer is continuous except for the said apertures.
Claim 3
Dependent Claim
31 words
A panel as claimed in claim 1 wherein the input ends of the coupling conductors are provided with flanges to provide area contact with the input face of the photo-conductive layer.
Claim 4
Dependent Claim
22 words
A panel as claimed in claim 1 wherein the input electrode grid is transparent to the radiation which is to be imaged.
Claim 5
Dependent Claim
48 words
A panel as claimed in claim 1 wherein the whole of the space between said input electrode grid and the plates is filled by the photo-conductor, nearly all the photo-conductor acting as a mere filler and only a very thin layer thereof being operative at the input face.
Claim 6
Dependent Claim
25 words
A panel as claimed in claim 4, wherein the input electrode grid and said flanges are transparent to the radiation which is to be imaged.
Claim 7
Dependent Claim
21 words
A panel as claimed in claim 1, wherein said means is a filler disposed as a backing on said electroluminescent layer.
References Cited (Backward Citations)
US3235736A
Cited
US2920232A
Cited
US3300645A
Cited
US3405276A
Cited
US3558974A
Cited
US3604938A
Cited
US3590253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |