Numerical division of two arrays by optical processing
US4686647A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1984 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Aug 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06E3/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for performing a division of a dividend intensity array by a divisor intensity array on a pixel-by-pixel basis, to yield a quotient intensity array, wherein optical feedback principles are utilized in conjunction with two spatial radiation modulators, so that analog division is achieved. Specifically, a fraction of the output array of a first spatial radiation modulator is provided as the readout array to a second spatial radiation modulator, whose input is the divisor intensity array. The output array of the second image converter is then added to the dividend array and provided as the input to the first spatial radiation modulator, whereupon the output of the first spatial radiation modulator is the pixel-by-pixel quotient array resulting from division of the dividend array by the divisor array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.