Image processing method for determining focus depth of a refractive laser
US9393157B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2011 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Aug 10, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00855
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a laser apparatus, system, and method for determining a depth of a focus point of a laser beam. An interface device is coupleable to the laser apparatus and has an applanation element comprising a front surface and a back surface. A laser beam having a predefined shape is focussed through the applanation element at a focus point. A superimposed image of a spurious reflection, which is reflected from the front surface of the applanation element, with a standard reflection, which is reflected from the back surface of the applanation element, is detected. The spurious reflection is then filtered out of the superimposed image. Based on the remaining standard reflection, the depth of the focus point of the laser beam can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.