Single aspherical lens for de-astigmatism, collimation, and circulation of laser beams
US6195208A · kind A · utility
12Cited by
10References
16Claims
0Family size
Inventors
Key dates
| Filing date | Oct 20, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0955
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An astigmatic and non-circular diverging input laser beam is converted into a collimated and circular output laser beam with its astigmatism corrected using a single aspherical lens. The input surface has a concave aspherical profile in the transverse direction and a convex aspherical profile in the longitudinal direction respectively for astigmatism correction. The output surface has a convex aspherical profile in the transverse direction and a non-curved profile in the longitudinal direction respectively for collimation and circularization of the final output laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.