Dielectric layer polarizer
US4966438A · kind A · utility
62Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Apr 4, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/283
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates in particular to polarizing light whose angle of incidence may vary substantially, e.g. over .+-.10.degree.. A polarizing stack (22) constituted by dielectric layers (30, 31, 32, 33, 34, . . . ) is formed on an oblique face (4). It is in the form of a repetitive sucession of symmetrical sequences (30, 31, 40) each constituted by two half-thickness low refractive index layers (30, 40) on either side of a high refracture index layer (31). The invention is particularly applicable to polarizing the light emitted by a semiconductor laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.