Hybrid tracking system
US6604825B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 26, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Sep 16, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00897
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hybrid tracking system is configured to combine the advantages of open loop and close loop tracking systems. The hybrid tracking system employs a position-sensing device in an open loop configuration, while the position-sensing device itself is a close loop device. A particular application of this tracking system is to track eye movement in a refractive laser surgery. The hybrid-tracking configuration enables optical and mechanical separation of the position-sensing device from the surgical laser beam. As a result, the position-sensing device can be made as a modular device, and the hybrid eye-tracking system can have a relatively large tracking range even when a curved mark such as the limbus is used as the tracking reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.