Measurement of the positions of centres of curvature of optical surfaces of a multi-lens optical system

US8913234B2 · kind B2 · utility

Assignee

• Trioptics GmbH · DE

Inventors

• Josef Heinisch · Wedel, DE
• Stefan Krey · Pinneberg, DE
• Eugen Dumitrescu · Wedel, DE
• Aiko Ruprecht · Wedel, DE
• Patrik Langehanenberg · Wedel, DE

Key dates

• Filing date: Nov 22, 2011
• Grant date: Dec 16, 2014
• Expiry date: Dec 5, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M11/0221
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method measures the positions of centers of curvature of optical surfaces of a multi-lens optical system. The spacings between the surfaces are measured along a reference axis using an interferometer. Subsequently the centers of curvature of the surfaces are measured using an optical angle-measuring device. In the course of the measurement of the position of the center of curvature of a surface situated within the optical system, the measured positions of the centers of curvature of the surfaces situated between this surface and the angle-measuring device and the previously measured spacings between the surfaces are taken into consideration computationally. In this way, a particularly high accuracy of measurement is achieved, because desired spacings do not have to be fallen back upon.