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US3742239A
Expired / Lapsed
US
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Discriminating devices
Assignee: EMI Ltd
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Filing: 1961-06-06
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Granted: 1973-06-26
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Expires: 1981-06-06
Abstract
Abstract 1. A target discriminating device comprising a plurality of radiation sensitive elements distributed in rows and columns over an image area, means for condensing incident radiation to form an image on said area, a plurality of row conductors corresponding to the rows of said sensitive elements, a plurality of column conductors corresponding to the columns of said sensitive elements, the row conductors being coupled to the column conductors by the sensitive elements in the respective rows and columns, means for sequentially sampling said column conductors to cause a signal to appear selectively in the row conductors in dependence upon the excitation of the said sensitive elements, an output channel common to said row conductors, coupling means including isolating two-state devices, one for each row conductor, arranged to pass a signal from the respective row conductor to the output channel once only within a predetermined time interval and means for additionally applying a signal to said output channel at each sampling instant, other than via the row conductors, in response to excitation of any sensitive element in the respective column, said output channel including means for generating an output signal only in response to a plural number of successively applied discrete signals within said time interval.
Inventors
- 👤 F Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:36
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/02; G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0411; G01J1/42; G01J1/4228; G01J1/0204; G01J1/0209; G01J2001/0276
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A target discriminating device comprising a plurality of radiation sensitive elements distributed in rows and columns over an image area, means for condensing incident radiation to form an image on said area, a plurality of row conductors corresponding to the rows of said sensitive elements, a plurality of column conductors corresponding to the columns of said sensitive elements, the row conductors being coupled to the column conductors by the sensitive elements in the respective rows and columns, means for sequentially sampling said column conductors to cause a signal to appear selectively in the row conductors in dependence upon the excitation of the said sensitive elements, an output channel common to said row conductors, coupling means including isolating two-state devices, one for each row conductor, arranged to pass a signal from the respective row conductor to the output channel once only within a predetermined time interval and means for additionally applying a signal to said output channel at each sampling instant, other than via the row conductors, in response to excitation of any sensitive element in the respective column, said output channel including means for generating an output signal only in response to a plural number of successively applied discrete signals within said time interval.
Claim 2
Dependent Claim
204 words
A target discriminating device comprising a plurality of radiation sensitive elements distributed in rows and columns over an image area, means for condensing incident radiation to form an image on said area, a plurality of row conductors corresponding to the rows of said sensitive elements, a plurality of column conductors corresponding to the columns of said sensitive elements, the row conductors being coupled to the column conductors by the sensitive elements in the respective rows and columns, means for sequentially sampling said column conductors to cause a signal to appear selectively in the row conductors in dependence upon the excitation of the said sensitive elements, an output channel common to said row conductors, coupling means including isolating two-state devices, one for each row conductor, arranged to pass a signal from the respective row conductor to the output channel once only within a predetermined time interval and means for additionally applying a signal to said output channel at each sampling instant, other than via the row conductors, in response to excitation of any sensitive element in the respective column, said output channel including means for generating an output signal only in response to a plural number of successively applied discrete signals within said time interval.
Claim 3
Dependent Claim
214 words
A target discriminating device comprising a plurality of radiation sensitive elements distributed over an image area, means for condensing incident radiation to form an image on said area, an output channel common to said radiation sensitive elements, coupling means for coupling said radiation sensitive elements to said output channel, said coupling means including isolating means which can be conditioned selectively to enable an excited element to apply or to prevent an excited element from applying a signal to said common channel, said isolating means being responsive to a plurality of said elements to render the condition of said isolating means at any instant dependent upon excitation of respective elements within a predetermined interval of time, thereby to allow an output signal to be produced in said output channel only when at least a predetermined plural number of said elements has been excited in said interval and to prevent an output signal being produced in said channel if a lesser number of said elements has been excited in said interval, and said isolating means comprising a plurality of individual isolating elements coupled to different sensitive elements, each isolating element being arranged to prevent the production of a signal in said output channel when only the respective sensitive element has been excited in the predetermined interval.
Claim 4
Dependent Claim
214 words
A target discriminating device comprising a plurality of radiation sensitive elements distributed over an image area, means for condensing incident radiation to form an image on said area, an output channel common to said radiation sensitive elements, coupling means for coupling said radiation sensitive elements to said output channel, said coupling means including isolating means which can be conditioned selectively to enable an excited element to apply or to prevent an excited element from applying a signal to said common channel, said isolating means being responsive to a plurality of said elements to render the condition of said isolating means at any instant dependent upon excitation of respective elements within a predetermined interval of time, thereby to allow an output signal to be produced in said output channel only when at least a predetermined plural number of said elements has been excited in said interval and to prevent an output signal being produced in said channel if a lesser number of said elements has been excited in said interval, and said isolating means comprising a plurality of individual isolating elements coupled to different sensitive elements, each isolating element being arranged to prevent the production of a signal in said output channel when only the respective sensitive element has been excited in the predetermined interval.
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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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |