US3606548A
Expired / Lapsed
US
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Measurement of dispersion of light
Assignee: NAT RES DEV
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Filing: 1968-10-10
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Granted: 1971-09-20
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Expires: 1988-10-10
Abstract
Abstract AN APPARATUS FOR MEASURING THE DISPERSION OF LIGHT DURING ITS PASSAGE THROUGH THE ATMOSPHERE IN WHICH A RAY OF LIGHT IS MODULATED BY A ROTATING CHOPPER. LIGHT OF DIFFERING WAVE-LENGTHS IN THE RAY IS CHOPPED AT DIFFERENT INSTANTS DUE TO THE LATERAL DISPLACEMENT OF IMAGES OF THE SOURCE OF THE RAY FORMED BY LIGHT OF DIFFERING WAVELENGTHS RESULTING FROM DISPERSION OF THE LIGHT BY THE ATMOSPHERE. THE PHASE DIFFERENCE OF THE MODULATIONS FOR TWO COLOURS, WHICH IS RELATED TO THE DISPERSION, IS MEASURED.
Inventors
- 👤 James Dyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |