Holographic diffraction grating patterns and methods for creating the same
US5291317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1990 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Jul 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods for creating a plurality of holographic diffraction grating patterns in a raster scan fashion. In accordance with the method, the desired pattern is made up of a large plurality of individual spots, each spot comprising a holographic diffraction grating of a predetermined grating spacing and angular orientation for that spot. Variation of the angular orientation and/or grating spacing between spots and/or groups of spots provide the desired holographic effect. The spot locations may vary as desired, including locations drawing out a desired pattern, and two-dimensional orthogonal matrices in which a pattern is drawn by variations between spots or group of spots as in a raster scan type image. Various embodiments and methods for creating the same are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.