METHOD AND APPARATUS FOR DETERMINING THE ABSORPTION IN A BLANK

摘要

A method for determining the absorption of a blank (2) for producing an optical element (3), including: radiating a heating light ray (8) through the blank (2) for the purpose of heating the blank (2), and determining the absorption in the blank (2) by measuring at least one property of a measurement light ray (10) influenced by the heating of the blank (2). In the method, either the heating light ray (8) and the measurement light ray (10) or the heating light ray and a further heating light ray are oriented to enter into the blank (2) through a first polished surface (2a) or a second polished surface (2b), situated opposite the first surface, and meet one another exclusively in the interior of the blank (2), preferably in a volume (12) used for the production of the optical element (3). An associated measuring apparatus (1), optical element (3), and optical arrangement are also disclosed.

主权项

1. Method for determining absorption of a blank provided for producing an optical element, comprising:
radiating a heating light ray through the blank for heating the blank, and determining the absorption in the blank by measuring at least one property of a measurement light ray influenced by the heating of the blank, wherein either the heating light ray and the measurement light ray or the heating light ray and a further heating light ray are oriented to enter into the blank through a first polished surface or a second polished surface situated opposite the first surface, and to meet one another exclusively in an interior of the blank.