Variable spot size illuminator having a zoom lens
US7150530B2 · kind B2 · utility
4Cited by
17References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2003 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jan 21, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/062
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides variable spot size illuminators that provide a light spot on a treatment plane by utilizing a zoom lens to direct light received from an image of a light source formed on an intermediate image plane onto the treatment plane. The zoom lens allows varying the size of the treatment spot while ensuring that the treatment spot exhibits parfocality. An illuminator of the invention can be utilized for performing a number of ophthalmic surgical procedures, such as, photocoagulation, transpupillary thermal therapy, and photodynamic therapy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.