Holographic imaging
Abstract
Abstract IN THE PARTICULAR EMBODIMENTS OF THE INVENTION DESCRIBED HEREIN, DEEP HOLOGRAPHIC IMAGING IS ACCOMPLISHED BY POLARIZING THE OBJECT AND REFERENCE BEAMS IN TWO PERPENDICULAR DIRECTIONS AND PASSING ONE OF THE BEAMS TWICE THROUGH A QUARTERWAVE PLATE PRIOR TO FORMATION OF THE HOLOGRAM. IN ONE FORM, THE OBJECT ILLUMINATING BEAM IS PASSED THROUGH A PHOTOGRAPHIC EMULSION AND THEN THROUGH A QUARTERWAVE PLATE TOWARD THE OBJECT, FROM WHICH IT IS REFLECTED BACK THROUGH THE QUARTERWAVE PLATE FOR INTERFERENCE WITH THE REFERENCE BEAM. IN ANOTHER FORM, THE REFERENCE BEAM PASSES THROUGH THE PHOTOGRAPHIC EMULSION AND A QUARTERWAVE PLATE TO A MIRROR, FROM WHICH IT IS REFLECTED BACK THROUGH THE QUARTERWAVE PLATE TO THE EMULSION FOR INTERFERENCE WITH THE OBJECT BEAM.
Inventors
- 👤 Dennis Gabor
Bibliographic Details
Claims Analysis
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |