Zoom handpiece for laser surgery
US6451010B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/173
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A handpiece for projecting laser radiation from a solid-state laser via an articulated arm to biological tissue being treated is disclosed. An optical system in the handpiece provides that the laser radiation is projected in a spot of selectively variable size at a fixed distance from the handpiece. The projected spot can be defined as an image of a characteristic invariant cross-section of the laser beam delivered to the handpiece which has about the same width at a wide range of M2 values of the laser beam. This provides that at any mechanically selected size, the size of the projected spot remains substantially constant over the range of M2 values between about 1 and 15. In one example the handpiece projects 2.94 &mgr;m radiation in a range of spot sizes between about 0.5 mm and 1.5 mm. Spot size remains substantially constant over a range of M2 values between about 1 and 15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.