Real-time analog creation of holographic fourier transform matched filters
US6323972A · kind A · utility
1Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Oct 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/0066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is disclosed by which filters are created optically in real time--and tested. This technique is made possible by recent advances in Charge Couple Detector (CCD) detector array technology. Pixel (picture element) size has decreased to the point that real fringes can be detected and displayed. The fringes result from the interference of the optical Fourier transform of a displayed scene with a specified plane wave. Phase information is thus preserved. This is the critical information required in producing a hologram or a holographic matched filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.