US3567947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging screen assembly for image intensifier tube
Assignee: Machlett Laboratories Inc
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Filing: 1969-03-26
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Granted: 1971-03-02
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Expires: 1989-03-26
Abstract
Abstract An image intensifier tube having an imaging screen assembly provided with means for preventing particles of imaging screen material and flakes of reflective coating material from being drawn electrostatically away from the imaging screen assembly, which means include an electrode comprising a layer of lighttransmissive material disposed between the imaging screen and the output face plate of the tube.
Inventors
- 👤 Charles D Robbing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:33
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
An image intensifier tube as set forth in claim 1 wherein said electrostatic field between the light reflecting layer and the light-transmissive layer is in the same direction as the electrostatic field between the electrode and the light reflecting layer.
Claim 2
Dependent Claim
42 words
An image intensifier tube as set forth in claim 1 wherein said electrostatic field between the light reflecting layer and the light-transmissive layer is in the opposite direction as compared to the electrostatic field between the electrode and the light reflecting layer.
Claim 3
Dependent Claim
145 words
An image intensifier tube comprising: an evacuated envelopE having opposing input and output face plates; a layer of photoemissive material disposed on the inner surface of the input face plate; a light-transmissive layer of conductive material disposed on the inner surface of the output face plate; a luminescent layer of dielectric material disposed on the inner surface of the light-transmissive layer; a light reflecting layer of conductive material adherently bonded to the inner surface of the luminescent layer; a microchannel plate disposed between the photoemissive layer and the light reflecting layer and having a conductive surface thereof disposed in opposing spaced relationship with the light reflecting layer; first means for producing an electrostatic attractive force between the conductive surface of the microchannel plate and the light reflecting layer; and second means for reducing the electrostatic effects of said attractive force on the light reflecting layer.
Claim 4
Dependent Claim
28 words
An image intensifier tube as set forth in claim 4 wherein said second means includes a voltage potential applied between the light reflecting layer and the light-transmissive layer.
Claim 5
Dependent Claim
49 words
An image intensifier tube as set forth in claim 5 wherein a higher positive voltage is applied to the light reflecting layer than to the conductive surface of the microchannel plate and a still higher positive voltage is applied to the light-transmissive layer than to the light reflecting layer.
Claim 6
Dependent Claim
133 words
An image intensifier tube comprising: a tubular envelope having an input face plate at one end and an output face plate at the opposite end; a photoemissive layer of conductive material disposed on the inner surface of the input face plate; a light-transmissive layer of conductive material disposed on the inner surface of the output face plate; a luminescent layer of dielectric material disposed on the inner surface of the light-transmissive layer; a light reflecting layer of conductive material disposed on the inner surface of the luminescent layer; a microchannel plate disposed between the photoemissive layer and the light reflecting layer and having opposing conductive surfaces in predetermined spaced relationship therewith; and means for applying voltage potentials to the layers of conductive material and to the opposing conductive surfaces of the microchannel plate.
Claim 7
Dependent Claim
49 words
An image intensifier tube as set forth in claim 7 wherein said means includes a second means for applying a higher positive voltage potential to the light reflecting layer than to the conductive surfaces of the microchannel plate and a still higher positive voltage potential to the light-transmissive layer.
Claim 8
Dependent Claim
60 words
An image intensifier tube as set forth in claim 7 wherein said means includes a second means for applying a higher positive voltage potential to the light reflecting layer than to the conductive surfaces of the microchannel plate and a lower positive voltage potential to the light-transmissive layer than said higher positive voltage potential applied to the light reflecting layer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |