Method of programmed displacement for prolong usage of optical elements under the irradiation of intensive laser beams
US6859335B1 · kind B1 · utility
25Cited by
6References
20Claims
0Family size
Inventors
Key dates
| Filing date | Nov 13, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Nov 14, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00897
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention contemplates a programmed displacement to prolong the usage life of UV crystal for deep UV generation by displacing step by step the crystal with interval between steps much shorter than the degradation time of the crystal. Meanwhile, the present invention contemplates the programmed displacement to obtain stable UV generation by avoiding defect locations of the crystal. Further, the present invention contemplates the programmed displacement to achieve optimal stability in UV power for each layer of UV ablation in photo-refractive surgery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.