Patent US3569967A successfully refreshed from Google Patents.
US3569967A
Expired / Lapsed
US
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Echo processing apparatus of side looking detection systems operating with frequency modulated transmitted pulses
Assignee: Thales SA
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Filing: 1968-12-06
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Granted: 1971-03-09
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Expires: 1988-12-06
Abstract
Abstract In a moving side-looking coherent detection system, wherein the transmitted pulses are linearly frequency modulated, the echoes are submitted to a compression which is a function of the range of the target from which they originate, and by means of which the recording of the echoes on a photographic film displaced at a speed proportional to that of the system, supplies, for each echo, a pattern similar to that of a Newton ring; the observation of that pattern with a coherent and plane luminous wave and an appropriate conventional optical system allows the direct vision of the position of the target.
Inventors
- 👤 Robert Jules Gendreu
- 👤 Jean Andre Lemoing
- 👤 Guy Francis Le Parquier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:01
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/89; G01S13/90; G01S13/9004; G01S13/9005; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/50; G01S13/58; G01S13/64
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A coherent linearly frequency modulated pulse detection system of the type comprising distance gates, a phase detection device coupled to said gates and having an output, scope means coupled to said output and synchronized with the distance gates, and means for recording the scope luminous signals on a moving film, wherein respective compression filters are respectively inserted between said gates and said phase detection device, the compression ratio of each filter having a predetermined algebraic value which is a function of the range of the distance gate to which it is coupled.
Claim 2
Dependent Claim
92 words
A coherent linearly frequency modulated pulse detection system of the type comprising distance gates, a phase detection device coupled to said gates and having an output, scope means coupled to said output and synchronized with the distance gates, and means for recording the scope luminous signals on a moving film, wherein respective compression filters are respectively inserted between said gates and said phase detection device, the compression ratio of each filter having a predetermined algebraic value which is a function of the range of the distance gate to which it is coupled.
Claim 3
Dependent Claim
72 words
A detection system according to claim 1, further comprising: first means for lighting said film with a coherent plane wave, said plane being decomposed when traversing the recorded signals into a group of further plane waves, a group of respective convergent waves having respective real foci an and a group of respective divergent waves having respective virtual foci; and second means for observing the foci of one of said groups of waves.
Claim 4
Dependent Claim
20 words
A detection system according to claim 2, further comprising means for recording on a film the group of foci observed.
Claim 5
Dependent Claim
95 words
A detection system according to claim 2, wherein said group foci comprising the virtual foci, said system comprise means for shifting the nonobserved planes and convergent waves out of the vision field of the observation means. Claim 5. A system according to claim 4, further comprising means for shifting by a constant value the frequency of the phase detected signals supplied to the scope means. Claim 6. A system according to claim 5, wherein said coherent plane is inclined with respect to said film by an angle which is a function of said auxiliary frequency.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |