Large holographic memory with plural overlapping detector arrays
US3949235A · kind A · utility
10Cited by
5References
5Claims
0Family size
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Key dates
| Filing date | Mar 12, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Mar 12, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C13/042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Relatively large hologram storage plates, e.g., those storing a large number of discrete entries such as character definitions for a large character set, comprise an array of mini-holograms arranged in different memory plate sections. A different photodiode array is associated with each hologram plate section (for efficiency, some elements of different diode arrays may be common). When the stored contents of any mini-hologram are interrogated by a coherent light beam, the stored information is derived via the associated photodiode array and converged (as by OR logic) to memory output terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.