Patent · US Active

Method and device for forming cut surfaces in a transparent material

US8685007B2 · kind B2 · utility

1Cited by

4References

9Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Hartmut Vogelsang · Jena, DE
Dan Z. Reinstein · New York, US
Matthias Wottke · Burgthann, DE
Andre Narr · Saalburg, DE
Wilfried Bissmann · Jena, DE

Key dates

Filing date	Apr 2, 2009
Grant date	Apr 1, 2014
Priority date	—
Expiry date	Mar 21, 2030

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2009/00897
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A method and a device for forming cut surfaces in a transparent material, particularly in the cornea, by producing optical breakthroughs in the material by application of laser radiation focused into the material. The focal point is adjusted in three dimensions to form the cut surface by the sequential arrangement of optical perforations. The focal point is guided in such a manner that cutting is divided into at least two steps, and in at least one of the steps, the formation of the cut is carried out with a path radius that decreases in size, and in one of the steps, the cut formation is carried out with a path radius that increases in size.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.