Ultraviolet light permeable filter for flaw detection light and method for detection of flaws
US6563126B1 · kind B1 · utility
1Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2002 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/283
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultraviolet light permeable filter for an ultraviolet detection light is equipped on a filter glass surface with a dielectric multi-film layer which allows a visible radiation of wave length from 694 nm to 780 nm to reflect on the layer. The 694 nm to 780 nm wave length does not penetrate through the multi-film layer. When placed in an ultraviolet detection system, this filter prevents the occurrence of a reddish halation during inspection and display of a flaw detection light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.