Diffraction gratings and optical branching filter elements
US4673241A · kind A · utility
50Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Oct 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical branching filter element comprised of a substrate having a wave guide thereon of a material capable of reversibly changing its refractive index and an erasable diffraction grating formed on the waveguide. The diffraction grating may be formed by a holographic exposure method or a light beam scanning method and may be erased by suitable erasing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.