Method of making infrared crystalline fiber
US5342022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Feb 4, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2201/84
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of making silver halide fibers involves reducing turbulence and friction during extrusion by moving an extrusion die in a direction opposite from flowing fiber and against a stationary preform arrangement. In another embodiment, the preform is doped with AgI or is a metal compound of the formula MY wherein M is selected from Li, Na, K, Rb, Cs; or MY.sub.2 wherein M is selected from Mg, Ca, Sr, Pb, Ba, Cd or Hg, and Y is selected from Cl, Br, or I. The resulting fiber has a more even core/clad interface with decrease in grain size to fiber surface and texture elongated along the fiber axis. This structure together with strengthening and stabilizing dopants, added to fiber material, gives decreased and stabilized optical losses and a higher elasticity of fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.