US3717404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the position of an object in an arbitrary cross-section of a beam of radiation
Assignee: US Philips Corp
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Filing: 1971-07-06
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Granted: 1973-02-20
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Expires: 1991-07-06
Abstract
Abstract AN APPARATUS FOR DETERMINING THE POSITION OF AN OBJECT IN AN ARBITRARY CROSS-SECTION OF A BEAM OF ELECTROMAGNETIC RADIATION IS DESCRIBED. IT IS SET FORTH THAT FOR THIS PURPOSE THE RADIATION BEAM IS PRODUCED BY TWO MONOCHROMATIC COHERENT ORTHOGONALLY POLARIZED RADIATION SOURCES HAVING DIFFERENT FREQUENCIES, THE FREQUENCY DIFFERENCE BEING SMALL COMPARED WITH EACH OF THE FREQUENCIES, WHILST THE RADIATION BEAM IS DIVIDED IN A POLARIZATION-SENSITIVE SYSTEM INTO AT LEAST TWO SUBBEAMS WHICH EACH HAVE ONE OF THE SAID DIFFERENT FREQUENCIES AND ARE APPLIED TO THE DETECTION SYSTEM RIGIDLY SECURED TO THE OBJECT.
Inventors
- 👤 R Dandliker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02; G01B9/02001; G01B9/02002; G01B9/02003; G01B2290/00; G01B2290/70
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |