Light transmission guides
US4190315A · kind A · utility
22Cited by
2References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1977 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Oct 20, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/1345
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light transmission guide comprising an anodic film of light transmitting material having a first anodised portion with a relatively high refractive index and at least a second portion with a relatively low refractive index, in which anodic film the increase in refractive index from said relatively high to said relatively low value is smooth and continuous in the vicinity of an interface between the first and second anodised portions, and in which the outer surface of said anodic film possesses a minimum amount of structural discontinuity on an atomic scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.