Method for heating a workpiece

US6621048B2 · kind B2 · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Jens Ullmann · Oberkochen, DE
• Ralf Kuschnereit · Oberkochen, DE

Key dates

• Filing date: Sep 4, 2001
• Grant date: Sep 16, 2003
• Expiry date: Oct 11, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a method for heating workpieces, in particular optical elements such as lenses, in particular lenses made from calcium fluoride material, which are optically transparent over a large IR wavelength region of up to approximately 9 &mgr;m, the heating by thermal radiation takes place in the transition region of the optical element between optical transparency and an optically absorbing region in a wavelength region from 9 to 12 &mgr;m.