Resonator system with at least two folding elements

US6768763B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Keming Du · Aachen, DE
• Peter Loosen · Stolberg, DE
• Reinhart Poprawe · Aachen, DE
• Konstantin Boucke · Aachen, DE

Key dates

• Filing date: Sep 6, 2001
• Grant date: Jul 27, 2004
• Expiry date: Sep 6, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/1071
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to a resonator system with at least two folding elements for folding the beam path. Said folding elements serve to restrict the divergence angle of the radiation. The inventive resonator system is further characterized in that the respective folding is caused by reflection on a reflecting surface of the respective folding element. The beam axis of the radiation and the surface normal of the respective reflecting area are positioned at an angle relative to each other that is greater than the critical angle for the total reflection but smaller than the sum of the critical angle for the total reflection plus the divergence angle of the radiation.