Patent US3272831A successfully refreshed from Google Patents.
US4095136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image tube employing a microchannel electron multiplier
Assignee: DKP A Corp OF
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Filing: 1971-10-28
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Granted: 1978-06-13
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Expires: 1991-10-28
Abstract
Abstract In an image tube, a microchannel electron multiplier plate is disposed between the photocathode and a cathodoluminescent output screen for multiplying the electron current of electron images. Electrodes are deposited upon the input and output face of the microchannel electron multiplier plate. On the output face the electrode is deposited into the ends of the microchannels to a distance of approximately 2 diameters of the individual channels. A semiconductive material, such as zinc sulphide, is deposited over the output electrode in the output ends of the microchannels for causing the secondary electrons emitted from the end portions of the microchannels to show a narrow energy spread, whereby the resolution of the intensified output image is enhanced.
Inventors
- 👤 Wilfrid F. Niklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:28
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; H01J31/00; H01J31/08; H01J31/26; H01J31/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
In an image tube, means for producing an electron image in the tube, a multichannel electron multiplier means having an electron image input face and an output face, means for accelerating and for directing said electron image upon the input face of said multichannel electron multiplier means for multiplying the electron current of said received image, an output means spaced from said output face of said electron multiplier means for receiving the multiplied output electron image of said electron multiplier means, metallic electrode means formed on the output face of said multichannel electron multiplier means for applying an operating potential to said output face of said electron multiplier means, said electrode means extending into the output ends of the channels and over the inside walls of said channels in said multichannel electron multiplier means, and a layer of semiconductive material overlaying said metallic electrode means, said semiconductive layer extending over said electrode means and into an output end portion of said channels, the remaining portion of said channels being free of said semiconductive material, for improving the information transfer of the electron image as directed from the output face of said multichannel electron multiplier onto said output means.
Claim 2
Dependent Claim
198 words
In an image tube, means for producing an electron image in the tube, a multichannel electron multiplier means having an electron image input face and an output face, means for accelerating and for directing said electron image upon the input face of said multichannel electron multiplier means for multiplying the electron current of said received image, an output means spaced from said output face of said electron multiplier means for receiving the multiplied output electron image of said electron multiplier means, metallic electrode means formed on the output face of said multichannel electron multiplier means for applying an operating potential to said output face of said electron multiplier means, said electrode means extending into the output ends of the channels and over the inside walls of said channels in said multichannel electron multiplier means, and a layer of semiconductive material overlaying said metallic electrode means, said semiconductive layer extending over said electrode means and into an output end portion of said channels, the remaining portion of said channels being free of said semiconductive material, for improving the information transfer of the electron image as directed from the output face of said multichannel electron multiplier onto said output means.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein said semiconductive material is zinc sulfide.
Claim 4
Dependent Claim
35 words
The apparatus of claim 1 wherein said electrode means and said overlaying semiconductive layer extend into the output ends of said channels for an axially extent within the range of 1 to 4 channel diameters.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |