High resolution recording medium
US4431695A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-color, high density recording medium including a substrate having at least two patterned interference filters formed thereon is described. Each of the filters transmits a different wavelength range of visible light and each of the filters comprises an unpatterned interference layer of an inorganic material which is substantially absorption-free in the visible wavelength range of the spectrum. At least one of the interference filters formed on the substrate comprises a first, unpatterned reflecting layer positioned on one side of the respective interference layer, and a second, patterned reflecting layer positioned on the other side of the respective interference layer, such that the pattern of only the first reflecting layer forms the pattern of the at least one interference filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.