Method of calculation for detailed waverfront calculation for spectacle lenses with a diffractive grating

US9835875B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Wolfgang Becken · Munich, DE
• Gregor Esser · Munich, DE
• Helmut Altheimer · Munich, DE
• Edda Wehner · Grafing, DE
• Stephan Trumm · Munich, DE
• Rainer Sessner · Roth, DE
• Dietmar Uttenweiler · Munich, DE

Key dates

• Filing date: Nov 16, 2011
• Grant date: Dec 5, 2017
• Expiry date: Sep 7, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/22
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Method for assessing an optical property of kth order of an optical element at an evaluation point. The optical element has a boundary surface formed of a refractive base surface and a phase-modifying optical element. The method includes determining the properties of a wavefront in the local surrounding of the evaluation point by means of a local wavefront tracing, anddetermining the optical property at the evaluation point based on the properties of the wavefront in the local surrounding of the evaluation point,wherein the local wavefront tracing has a local wavefront tracing upon passage through the boundary surface, and the local wavefront tracing upon passage through the boundary surface is performed according to the equation for the local wavefront tracing through the refractive base surface, the equation being supplemented by an additive additional term PK(k).