Closed-loop focal positioning system and method
US6751033B2 · kind B2 · utility
104Cited by
13References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Oct 12, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00891
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A closed-loop focusing system and method positions a focusing assembly to a desired positioned. A feedback positioning device, such as a linear encoder, provides an actual or “read” value for the linear movement of the focusing assembly. The desired position is compared to the actual position of the focusing assembly. If the two values are outside of a predetermined tolerance or valid range, then an audible or visual warning will be given. Furthermore, when a laser source is utilized with the focusing system, then laser operation will be prevented where the two values are outside of tolerance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.