Surface relief volume reflective diffractive structure
US8254029B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2008 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Mar 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/25
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A surface relief structure includes a recording medium configured to be structurally modified when exposed to interfering and non-interfering portions of radiation beams, the structurally modified recording medium including, when viewed in a two-dimensional cross-section along one of the axes of the recording medium a plurality of equally spaced steps of fine-sized periodicity superimposed upon a plurality of deep depressions of substantially coarse-sized periodicity. The structurally modified recording medium is configured to produce in reflection single and multiple colors in a broad spectral range when illuminated by a source of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.