Patent · US Active

Method and device for increasing an optical system focal depth

US7950398B2 · kind B2 · utility

17Cited by

4References

13Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Eckhard Schroeder · Eckental, DE
Matthias Wottke · Burgthann, DE
Rudolf Von Buenau · Jena, DE

Key dates

Filing date	Mar 23, 2006
Grant date	May 31, 2011
Priority date	—
Expiry date	Mar 7, 2028

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2009/00895
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A method and device for modifying optical system properties by means of a continuously multifocal profile, wherein said profile comprises a component for increasing the optical system focal depth and is calculated according to a fourth-order Zernike polynom. The aim of said invention is to avoid the eye base refraction and, for this purpose, said focal depth increasing component is also calculated according to the second-order Zernike polynom.

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