Polytopic multiplex holography
US7167286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/55
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a multiplexing method and apparatus that allows holograms to be spatially multiplexed with partial spatial overlap between neighboring stacks of holograms. Each individual stack can additionally take full advantage of an alternate multiplexing scheme such as angle, wavelength, phase code, peristrophic, or fractal multiplexing, for example. An amount equal to the beam waist of the signal beam writing a hologram separates individual stacks of holograms. Upon reconstruction, a hologram and its neighbors will all be readout simultaneously. An filter is placed at the beam waist of the reconstructed data such that the neighbors that are read out are not transmitted to the camera plane. Alternatively, these unwanted reconstructions can be filtered out with an angular filter at an intermediate plane in the optical system that has a limited angular passband.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.