Method and device for increasing an optical system focal depth

US8307832B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

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

Key dates

• Filing date: May 27, 2011
• Grant date: Nov 13, 2012
• Expiry date: May 27, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00895
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for changing a property of an eye uses a continuously multifocal profile that includes a component for increasing a focal depth. The method includes calculating the component for increasing the focal depth to be rotation-symmetrical. Alternatively, or in addition, the calculating is carried out so as to optimize an encircled energy criterion over an extended range of depth.