US3606518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wavefront reconstruction process and system
Assignee: McDonnell Douglas Corp
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Filing: 1969-05-14
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Granted: 1971-09-20
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Expires: 1989-05-14
Abstract
Abstract A NEW PROCESS FOR CREATING A HOLOGRAM IS DISCLOSED WHICH UTILIZES A COMPUTER TO INTERPOLATE THE PHASE OF IMPINGING RADIATON AS BETWEEN DISCRETE TRANSDUCERS IN AN ARRAY AND TO CALCULATE THE LOCATION OF LINES OF EQUAL PHASE AS BETWEEN TRANSDUCERS OF THE WAVES OF RECONSTRUCTION RADIATION. A PHOTOGRAPHIC RECORD, EQUIVALENT TO A DIFFRACTION GRATING, IS CREATED USING THE COMPUTER OUTPUT AND THE RECORD CAN BE USED AS A HOLOGRAM TO GENERATE REAL AND VIRTUAL IMAGES.
Inventors
- 👤 Alexander F Metherell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:51
CPC Classifications
G; G03; G03H; G03H3/00
Claims Analysis
Total Claims: 0
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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) | 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 |