US3603832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image intensifier with channel-type secondary emission multiplier
Assignee: US Philips Corp
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Filing: 1968-11-22
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Granted: 1971-09-07
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Expires: 1988-11-22
Abstract
Abstract An electronic image intensifier including an electron multiplier. The device comprises a photocathode, a fluorescent screen, and a body between and spaced from the photocathode and screen. The body is provided with a plurality of elongated, longitudinal passageways, the walls of which are secondary emissive. Electrodes are provided on opposite surfaces bounding the channels and an electrically conductive electron-permeable membrane covering the entrance to each passageway.
Inventors
- 👤 Brian Willaim Manley
- 👤 Pieter Schagen
- 👤 John Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
An electronic image intensifier device including a photocathode, a fluorescent screen and a secondary emission multiplier between and spaced from the photocathode and screen said multiplier comprising a body of insulating material having a plurality of parallel, closely adjacent narrow passageways therein opening out on opposite faces thereof the surfaces of said passageways being of resistive, secondary-emissive material, a conductive layer on the face of said body facing said screen constituting an output electrode and a conductive layer on the face remote from said screen constituting an input electrode, an insulating layer on said input electrode, and a continuous electrically-conductive electron-permeable membrane covering said insulating layer and obturating the entrance to each passageway.
Claim 2
Dependent Claim
113 words
An electronic image intensifier device including a photocathode, a fluorescent screen and a secondary emission multiplier between and spaced from the photocathode and screen said multiplier comprising a body of insulating material having a plurality of parallel, closely adjacent narrow passageways therein opening out on opposite faces thereof the surfaces of said passageways being of resistive, secondary-emissive material, a conductive layer on the face of said body facing said screen constituting an output electrode and a conductive layer on the face remote from said screen constituting an input electrode, an insulating layer on said input electrode, and a continuous electrically-conductive electron-permeable membrane covering said insulating layer and obturating the entrance to each passageway.
Claim 3
Dependent Claim
16 words
A multiplier tube as claimed in claim 1 wherein the screen is devoid of metal backing.
Claim 4
Dependent Claim
12 words
A device as claimed in claim 1 wherein the membrane is aluminum.
Claim 5
Dependent Claim
18 words
A device as claimed in claim 3 wherein the membrane has a thickness between 500 and 1000 angstroms.
Claim 6
Dependent Claim
25 words
A device as claimed in claim 1 in which the screen is adapted to emit light of wavelengths to which the membrane is substantially opaque.
References Cited (Backward Citations)
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US2928969A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |