US3372278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for locating sources of infrared radiation
Assignee: Albiswerk Zuerich AG
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Filing: 1966-02-09
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Granted: 1968-03-05
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Expires: 1986-02-09
Abstract
No abstract record available.
Inventors
- 👤 Aemmer Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/787; G01S3/788; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
304 words
IN APPARATUS FOR LOCATING SOURCES OF INFRARED RADIATION BY MEASURING AT LEAST ONE ANGULAR COORDINATE RELATIVE TO THE OPTICAL AXIS OF THE APPARATUS, SAID APPARATUS HAVING A FIRST RADIATION DETECTOR, AN OBJECTIVE FOR PROJECTING AN IMAGE OF THE SOURCE-CONTAINING SPACE ONTO SAID FIRST DETECTOR, AND A SCANNING MEMBER DISPOSED BETWEEN SAID DETECTOR AND SAID OBJECTIVE FOR CAUSING SAID DETECTOR TO ISSUE FOR EACH INFINITESIMAL IMAGE ELEMENT A FIRST OSCILLATING AND FREQUENCY-MODULATED SIGNAL, THE IMPROVED WHICH COMPRISES A SECOND RADIATION DETECTOR ON ONE SIDE OF SAID SCANNING MEMBER, AN INTERNAL AUXILIARY RADIATOR SITUATED ON THE OTHER SIDE OF SAID SCANNING MEMBER FOR IRRADIATION SAID SECOND DETECTOR THROUGH SAID SCANNING MEMBER TO PRODUCE IN SAID SECOND DETECTOR A SECOND OSCILLATING AND FREQUENCY-MODULATED SIGNAL, SAID RADIATOR BEING DISPLACEABLE RELATIVE TO SAID SECOND DETECTOR FOR ADJUSTING THE PHASE POSITION OF SAID SECOND SIGNAL RELATIVE TO THE PHASE POSITION DETECTORS FOR MIXING SAID FIRST AND SECOND SIGNALS, A FILTER CONNECTED TO SAID MIXER STAGE FOR FURNISHING A MODULATED OF SAID FIRST SIGNAL, A MIXER STAGE CONNECTED TO SAID TWO MIXED SIGNAL, A FREQUENCY DISCRIMINATOR STAGE CONNECTED TO SAID MIXER STAGE FOR DEMODULATING SAID MIXED SIGNAL, A SECOND FREQUENCY DISCRIMINATOR STAGE CONNECTED TO ONE OF SAID TWO DETECTORS FOR DEMODULATING THE SIGNAL ISSUING THEREFROM, A PHASE DISCRIMINATOR CONNECTED TO SAID TWO FREQUENCY DISCRIMINATOR STAGES FOR MEASURING THE PHASE ANGLE BETWEEN THE TWO DEMODULATED SIGNALS, SAID PHASE DISCRIMINATOR HAVING AN OUTPUT VOLTAGE INDICATIVE OF SAID PHASE ANGLE, POSITIONAL CONTROL MEANS MECHANICALLY CONNECTED WITH SAID AUXILIARY RADIATOR AND ELECTRICALLY CONNECTED TO SAID PHASE DISCRIMINATOR FOR DISPLACING SAID RADIATOR IN THE PHASE-ANGLE REDUCING SENSE UNDER CONTROL BY SAID OUTPUT VOLTAGE, AND AN ADDING STAGE CONNECTED TO SAID TWO FREQUENCY DISCRIMINATOR STAGES AND HAVING AN OUTPUT VOLTAGE CORRESPONDING TO THE SUM OF SAID TWO DEMODULATED SIGNALS AND INDICATIVE OF THE ANGULAR COORDINATE BEING MEASURED.
Claim 2
Dependent Claim
304 words
IN APPARATUS FOR LOCATING SOURCES OF INFRARED RADIATION BY MEASURING AT LEAST ONE ANGULAR COORDINATE RELATIVE TO THE OPTICAL AXIS OF THE APPARATUS, SAID APPARATUS HAVING A FIRST RADIATION DETECTOR, AN OBJECTIVE FOR PROJECTING AN IMAGE OF THE SOURCE-CONTAINING SPACE ONTO SAID FIRST DETECTOR, AND A SCANNING MEMBER DISPOSED BETWEEN SAID DETECTOR AND SAID OBJECTIVE FOR CAUSING SAID DETECTOR TO ISSUE FOR EACH INFINITESIMAL IMAGE ELEMENT A FIRST OSCILLATING AND FREQUENCY-MODULATED SIGNAL, THE IMPROVED WHICH COMPRISES A SECOND RADIATION DETECTOR ON ONE SIDE OF SAID SCANNING MEMBER, AN INTERNAL AUXILIARY RADIATOR SITUATED ON THE OTHER SIDE OF SAID SCANNING MEMBER FOR IRRADIATION SAID SECOND DETECTOR THROUGH SAID SCANNING MEMBER TO PRODUCE IN SAID SECOND DETECTOR A SECOND OSCILLATING AND FREQUENCY-MODULATED SIGNAL, SAID RADIATOR BEING DISPLACEABLE RELATIVE TO SAID SECOND DETECTOR FOR ADJUSTING THE PHASE POSITION OF SAID SECOND SIGNAL RELATIVE TO THE PHASE POSITION DETECTORS FOR MIXING SAID FIRST AND SECOND SIGNALS, A FILTER CONNECTED TO SAID MIXER STAGE FOR FURNISHING A MODULATED OF SAID FIRST SIGNAL, A MIXER STAGE CONNECTED TO SAID TWO MIXED SIGNAL, A FREQUENCY DISCRIMINATOR STAGE CONNECTED TO SAID MIXER STAGE FOR DEMODULATING SAID MIXED SIGNAL, A SECOND FREQUENCY DISCRIMINATOR STAGE CONNECTED TO ONE OF SAID TWO DETECTORS FOR DEMODULATING THE SIGNAL ISSUING THEREFROM, A PHASE DISCRIMINATOR CONNECTED TO SAID TWO FREQUENCY DISCRIMINATOR STAGES FOR MEASURING THE PHASE ANGLE BETWEEN THE TWO DEMODULATED SIGNALS, SAID PHASE DISCRIMINATOR HAVING AN OUTPUT VOLTAGE INDICATIVE OF SAID PHASE ANGLE, POSITIONAL CONTROL MEANS MECHANICALLY CONNECTED WITH SAID AUXILIARY RADIATOR AND ELECTRICALLY CONNECTED TO SAID PHASE DISCRIMINATOR FOR DISPLACING SAID RADIATOR IN THE PHASE-ANGLE REDUCING SENSE UNDER CONTROL BY SAID OUTPUT VOLTAGE, AND AN ADDING STAGE CONNECTED TO SAID TWO FREQUENCY DISCRIMINATOR STAGES AND HAVING AN OUTPUT VOLTAGE CORRESPONDING TO THE SUM OF SAID TWO DEMODULATED SIGNALS AND INDICATIVE OF THE ANGULAR COORDINATE BEING MEASURED.
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |