Patent US3555344A successfully refreshed from Google Patents.
US3555344A
Expired / Lapsed
US
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Image dissector for counteracting magnification due to range closure
Assignee: United States Department of the Navy
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Filing: 1968-03-06
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Granted: 1971-01-12
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Expires: 1988-03-06
Abstract
Abstract An image dissector tube having an aperture plate for forming an electronic scanning slit and for counteracting the magnification or growth effect of an object in the scene image due to range closure.
Inventors
- 👤 Loyd C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/42; H01J31/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
An image dissector tube for counteracting the effect of magnification of objects within the scene image, comprising: a. a tube housing having a transparent input end; b. a photocathode means at the input end of said tube for emitting an electron image of objects in a scene viewed at said tube input; c. readout means; d. focusing means for focusing the electron image emitted from said photocathode means and projecting the image upon said readout means; e. deflection means for moving the focused electron image about the surface of said readout means; f. said readout means comprising an aperture plate having a plurality of apertures extending from the center in progressively increasing magnitude to the outer edge of said aperture plate for sampling the electron image; g. an output anode for each aperture in said aperture plate to which is fed electron energy from respective apertures; h. respective microchannel electron multipliers provided for each aperture between respective apertures and output anodes to provide additional gain; and i. the size of said electron multipliers in both diameter and length being in proportion to their respective apertures.
Claim 2
Dependent Claim
185 words
An image dissector tube for counteracting the effect of magnification of objects within the scene image, comprising: a. a tube housing having a transparent input end; b. a photocathode means at the input end of said tube for emitting an electron image of objects in a scene viewed at said tube input; c. readout means; d. focusing means for focusing the electron image emitted from said photocathode means and projecting the image upon said readout means; e. deflection means for moving the focused electron image about the surface of said readout means; f. said readout means comprising an aperture plate having a plurality of apertures extending from the center in progressively increasing magnitude to the outer edge of said aperture plate for sampling the electron image; g. an output anode for each aperture in said aperture plate to which is fed electron energy from respective apertures; h. respective microchannel electron multipliers provided for each aperture between respective apertures and output anodes to provide additional gain; and i. the size of said electron multipliers in both diameter and length being in proportion to their respective apertures.
Claim 3
Dependent Claim
24 words
A device as in claim 1 wherein said apertures extend in a single line from the center to the edge of said aperture plate.
Claim 4
Dependent Claim
31 words
A device as in claim 1 wherein an image intensifier means is positioned between said photocathode means and focusing means for multiplying the number of electrons emitted from the photocathode means.
Claim 5
Dependent Claim
40 words
A device as in claim 1 wherein the apertures extend in four separate rows of apertures extending from the center to the edge of said aperture plate with one row of apertures being in each quadrant of the aperture plate.
Claim 6
Dependent Claim
27 words
A device as in claim 1 Wherein said deflection means is for rotating the electron image about an axis perpendicular to the center of said readout means.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |