US4039815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical correlator
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1975-10-20
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Granted: 1977-08-02
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Expires: 1995-10-20
Abstract
Abstract A system for electro-optically correlating two signals. A running representation of the amplitude variation of a first signal is observed through a mask representing the amplitude variation of a second signal. Means are provided for integrating the resultant light signal and for generating an electrical output signal representing the correlation function of the first and the second signal.
Inventors
- 👤 Ronald Jan Geluk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:34
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001; G06E3/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A system for electro-optically correlating two signals, characterized by: means for forming a running representation of the amplitude variation of one of said signals, and comprised of a cathode ray tube having a phosphorescent screen, said cathode ray tube including deflection plates controlled to produce a light track on said phosphorescent screen, each point of said track having a brightness corresponding to the instantaneous amplitude of said one of said signals; at least one masking means having a geometric configuration representing the amplitude variation of the other of said signals; an image intensifier tube, said image intensifier tube having deflection coils energized so that a dot travelling on said phosphorescent screen of said cathode ray tube is reproduced as a stationary dot on an anode of said image intensifier tube; and means for observing the running representation through said masking means and for integrating the observed signal.
Claim 2
Independent Claim
147 words
A system for electro-optically correlating two signals, characterized by: means for forming a running representation of the amplitude variation of one of said signals, and comprised of a cathode ray tube having a phosphorescent screen, said cathode ray tube including deflection plates controlled to produce a light track on said phosphorescent screen, each point of said track having a brightness corresponding to the instantaneous amplitude of said one of said signals; at least one masking means having a geometric configuration representing the amplitude variation of the other of said signals; an image intensifier tube, said image intensifier tube having deflection coils energized so that a dot travelling on said phosphorescent screen of said cathode ray tube is reproduced as a stationary dot on an anode of said image intensifier tube; and means for observing the running representation through said masking means and for integrating the observed signal.
Claim 3
Dependent Claim
21 words
The system according to claim 1, and further including an objective mounted between said phosphorescent screen and said image intensifier tube.
Claim 4
Dependent Claim
47 words
The system according to claim 1 characterized in that said masking means includes areas arranged so that the light transmission, along a line each time corresponding to said running representation of said one of said signals on said anode, represents the amplitude variation of said other signal.
Claim 5
Dependent Claim
22 words
The system according to claim 1 characterized in that said means for observing and integrating said observed signal is a light detector.
Claim 6
Dependent Claim
47 words
The system according to claim 1 characterized by light distributing means each followed by a masking means, each masking means representing a different amplitude variation, the running representation of said one of said signals being concurrently observable and integrable through each masking means by a light detector.
Claim 7
Dependent Claim
43 words
The system according to claim 5 characterized in that at least one of said masking means represents a compressed representation of a signal and at least one further masking means represents an expanded representation of said signal so as to determine Doppler displacements.
Claim 8
Dependent Claim
17 words
The system according to claim 1 wherein said masking means has a spatially varying light transmission factor.
Claim 9
Dependent Claim
36 words
The system according to claim 6, characterized by said masking means being provided with a spatially varying light transmission factor so that said masking means represents both a compressed and an expanded representation of a signal.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |