US3369445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical alignment ascertaining device and process for elimination of refractive effects
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1963-09-09
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Granted: 1968-02-20
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Douglas A Kohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:46
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
APPARATUS FOR DETERMINING THE EXTEND OF MISALIGNMENT BETWEEN AN AXIS OF A SIGHTING INSTRUMENT AND A LINE OF SIGHT FROM SAID INSTRUMENT TO A SOURCE OF LIGHT, WHEREIN LIGHT FROM SAID SOURCE IS REFRACTED TO PRODUCE DIFFERENT WAVELENGTH COMPONENTS, WHICH APPARATUS COMPRISES: BEAM SPLITTING MEANS HAVING AN AXIS OF SYMMETRY FOR SEPARATING LIGHT INCIDENT THEREON INTO FIRST AND SECOND PATHS, SAID BEAM SPLITTING MEANS BEING EFFECTIVE TO SPLIT EACH OF SAID DIFFERENT WAVELENGTH COMPONENTS ACCORDING TO THE LOCATION OF INCIDENCE THEREOF RELATIVE TO SAID AXIS; MEANS FOR DETECTING FOR EACH SAID DIFFERENT WAVELENGTH COMPONENT OF SAID COMPONENTS THE DIFFERENCE IN THE INTENSITY OF SAID COMPONENT IN SAID FIRST PATH FROM THAT OF SAID COMPONENT IN SAID SECOND PATH TO PRODUCE A DIFFERENCE OUTPUT FOR EACH OF SAID DIFFERENT WAVELENGTH COMPONENTS; MEANS FOR COMPARING THE MAXIMUM ONE OF SAID DIFFERENCE OUTPUTS WITH EACH OF SAID DIFFERENCE OUTPUTS; MEANS FOR GENERATING A SIGNAL INDICATIVE OF THE RELATIVE MAGNITUDE OF SAID MAXIMUM ONES OF SAID DIFFERENCE OUTPUTS AND SAID DIFFERENCE OUTPUTS; AND MEANS RENDERED EFFECTIVE WHEN SAID SIFNAL REACHES A PREDETERMINED LEVEL FOR DETERMINING THE DIFFERENCE BETWEEN THE INTENSITY OF SAID DIFFERENT WAVELENGTH COMPONENTS IN SAID FIRST PATH AND THAT OF SAID DIFFERENT WAVELENGTH COMPONENTS IN SAID SECOND PATH TO INDICATE THE EXTENT OF SAID MISALIGNMENT.
Claim 2
Dependent Claim
146 words
THE PROCESS OF ELIMINATING THE EFFECT OF REFRACTION IN THE ALIGNMENT OF A REFERENCE LINE OF A SIGHTING DEVICE WITH A LINE OF SIGHT EXTENDING FROM A SOURCE OF LIGHT TO SAID SIGHTING DEVICE, WHICH COMPRISES THE STEPS OF: POINTING SAID SIGHTING DEVICE GENERALLY TOWARD SAID LINE OF SIGHT TO PERMIT LIGHT FROM SAID SOURCE TO IMPINGE UPON SAID REFERENCE LINE, REFRACTION OF SAID LIGHT BEING EFFECTIVE TO PRODUCE SPACED, DIFFERENT WAVELENGTH LIGHT COMPONENTS, SAID LIGHT WHICH IS UNREFRACTED HAVING SAID DIFFERENT WAVELENGTH COMPONENTS BUNCHED SO THAT SAID SPACING IS LESS THAN A GIVEN AMOUNT; MEASURING THE AMOUNT OF SAID SPACING OF SAID DIFFERENT WAVELENGTH COMPONENTS; AND WHEN SAID MEASURED AMOUNT OF SPACING IS LESS THAN SAID GIVEN AMOUNT OF SAID SPACING MEASURING THE DISTANCE BETWEEN SAID BUNCHED COMPONENTS AND SAID REFERENCE LINE TO INDICATE THE ALIGNMENT OF SAID SIGHTIN DEVICE WITH SAID LINE OF SIGHT.
References Cited (Backward Citations)
US3103586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |