Method and apparatus for analyzing optical waveguide cane
US5396323A · kind A · utility
8Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1994 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Feb 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/412
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for non-destructive analysis of canes and preforms which contain "striae" in which the cane or preform is transversely illuminated with a beam of light at a wavelength which is long enough to substantially eliminate the effect of striae resulting from variations in dopant concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.