Optical system with compensated spatial dispersion

US6816326B2 · kind B2 · utility

Assignee

• Schott Glas · DE

Inventors

• Kurt Nattermann · Ockenheim, DE
• Ewald Moersen · Mainz, DE

Key dates

• Filing date: Jul 12, 2002
• Grant date: Nov 9, 2004
• Expiry date: Jul 12, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B13/143
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The optical system has a first optical element (11,17, 19, 26) and a second optical element (12, 18, 20, 27) having respective plane surfaces and cubic crystal structures, which are arranged next to each other along an optic axis (10) so that one of the crystal axes of each optical element is parallel to the optic axis and the plane surfaces are resting against each other. The first and second optical elements have first and second orientations in relation to the optic axis, which are preferably rotated by a rotation about the optic axis (10) with respect to each other according to the rotational symmetry of the material. At least one of the first optical element and second optical element is pre-stressed by applying a compressive stress (&sgr;,&sgr;,1,&sgr;2) thereto. The compressive stress is applied radially symmetrically in a plane perpendicular to the optic axis (10) and compensates for spatial dispersion.