Holographic optical devices for the transmission of optical signals of a plurality of channels
US5682255A · kind A · utility
208Cited by
27References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/0408
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic optical device includes a light-transmissive substrate, a first holographic optical element, and a second holographic optical element that is laterally disposed on the substrate from the first holographic optical element. At least one of the holographic optical elements is a complex diffraction grating that can handle a multiplicity of plane and/or spherical waves arriving from a range of angles, and having a range of wavelengths. Applications for the device include a wavelength division multiplexer/demultiplexer, an image reconstructor, a beam expander/compressor, and a visor/head-up display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.