Array of focusing holograms
Abstract
Abstract AN ARRAY OF LIGHT FOCUSING HALOGRAMS IS DISCLOSED, THAT IS PARTICULARLY USEFUL IN RECORDING A HALOGRAM MEMORY. LIKE THE ARRAY OF FOCUSING HALOGRAMS IN U.S. PAT. 3,530,442, EACH OF THESE HOLOGRAMS IS FORMED SO THAT IT DIRECTS LIGHT THROUGH A PAGE OF DIGITAL DATA TO A DIFFERENT PORTION OF A PLANE WHERE THE HALOGRAM MEMORY IS RECORDED. IN ADDITION, HOWEVER, EACH HALOGRAM IS ALSO FORMED SO THAT IT DIRECTS LIGHT THROUGH ONLY THOSE PORTIONS OF THE DATA PAGE WHERE INFORMATION CAN BE FOUND. MOREOVER, THE LIGHT FOCUSSING HALOGRAM ARE ALSO DESIGNED TO REDUCE THE ABERRATIONS THAT WOULD OTHERWISE BE ENCOUNTERED IN RECORDING A HALOGRAM MEMORY AT POINTS NOT ON A NORMAL TO THE DATA PAGE. ADDITIONAL FEATURES OF THIS DISCLOSURE MAKE POSSIBLE THE CONVIENT SUBSTITUTION OF ONE DATA PAGE FOR ANOTHER AND THE EFFICIENT READOUT OF THE MEMORY.
Inventors
- 👤 C Vincelette
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |