Optical grating and a method of fabricating an optical grating
US6172811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jan 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/02166
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical grating includes a sequence of grating lines, the sequence being such that each grating line is centered on a position which is an integer multiple of a line spacing distance from a datum position on the grating, the sequence of grating lines is non-periodic and the sequence of the grating lines is formed from N concatenated sub-sequences. Each sub-sequence includes a series of one or more instances of a respective grating line pattern. Such an optical grating has a structure that is more amenable to calculation of the grating lines necessary to achieve a desired characteristic. A method of calculating and fabricating such a grating is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.