US3898498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel multiplier having non-reflective amorphous aluminum layer obturating channel entrances on side facing photocathode
Assignee: US Philips Corp
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Filing: 1974-01-14
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Granted: 1975-08-05
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Expires: 1994-01-14
Abstract
Abstract An improved non-reflective input electrode membrane for a channel plate electron multiplier comprising a layer of reflective aluminum on the side facing the channel plate and a layer of non-reflective amorphous aluminum on the other side.
Inventors
- 👤 Henry Dermott Stone
- 👤 Iain Craig Paton Millar
- 👤 David Henry Nicholls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:57
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; H01J9/00; H01J9/02; H01J9/12; H01J9/125; H01J2201/00; H01J2201/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
IN A CHANNEL PLATE IMAGE INTENSIFIER DEVICE OF THE TYPE WHEREIN A PHOTOCATHODE CLOSELY FACES THE IMPUT SIDE OF A CANNEL PLATE ELECTRON MULTIPLIER, SAID MPUT SIDE HAVING AN ELECTRON PERMEABLE IMPUT ELECTRODE MEMBRANE OBTURATING THE ENTRANCES TO THE CHANNELS OF SAID CHANNEL PLATE ELECTRON MULTIPLIER, THE IMPROVEMENT WHEREIN SAID IMPUT ELECTRODE MEMBRANE COMPRISES A LAYER OF REFLECTIVE ALUMINUM FACING SAID CHANNELS AND A LAYER OF NON-REFLECTIVE AMORPHOUS ALUMINUM FACING SAID PHOTOCATHODE
Claim 2
Dependent Claim
72 words
IN A CHANNEL PLATE IMAGE INTENSIFIER DEVICE OF THE TYPE WHEREIN A PHOTOCATHODE CLOSELY FACES THE IMPUT SIDE OF A CANNEL PLATE ELECTRON MULTIPLIER, SAID MPUT SIDE HAVING AN ELECTRON PERMEABLE IMPUT ELECTRODE MEMBRANE OBTURATING THE ENTRANCES TO THE CHANNELS OF SAID CHANNEL PLATE ELECTRON MULTIPLIER, THE IMPROVEMENT WHEREIN SAID IMPUT ELECTRODE MEMBRANE COMPRISES A LAYER OF REFLECTIVE ALUMINUM FACING SAID CHANNELS AND A LAYER OF NON-REFLECTIVE AMORPHOUS ALUMINUM FACING SAID PHOTOCATHODE
Claim 3
Dependent Claim
36 words
In a channel plate image intensifier device, the improvement defined in claim 1 wherein said layer of non-reflective amorphous aluminum is thicker than but not more than five times thicker than said layer of reflective aluminum.
Claim 4
Dependent Claim
43 words
In a channel plate image intensifier device, the improvement defined in claim 2 wherein the thickness of said layer of reflective aluminum is approximately 200 angstroms and the thickness of said layer of non-reflective amorphous aluminum is between 300 angstroms and 800 angstroms.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |