Method and apparatus for determining surface data and/or measurement data relating to a surface of an at least partially transparent object

US10337953B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Stephan Trumm · Munich, DE
• Rainer Sessner · Roth, DE
• Dietmar Uttenweiler · Munich, DE

Key dates

• Filing date: Mar 23, 2016
• Grant date: Jul 2, 2019
• Expiry date: Apr 5, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/21
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and an apparatus for determining surface data and/or measurement data relating to a surface, for the quality control of an at least a partially transparent object, an ophthalmic lens, having an optically active first surface and an opposite optically active second surface. The method includes irradiating polarized light with an irradiation polarization from at least one illumination device onto an analysis area of the object to be examined, wherein, for the purpose of setting the irradiation polarization, the light is passed through a polarizer assigned to the illumination device or integrated in the latter, and receiving light which is reflected at the first and/or second surface and has an analysis polarization by use of at least one receiving device, wherein the light is passed through an analyzer assigned to the receiving device or integrated in the latter.