Device for homogenizing radiation by means of irregular microlens arrays

US7839573B2 · kind B2 · utility

Assignee

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

Inventors

• Frank Wippermann · Meiningen, DE
• Andreas Bräuer · Schlöben, DE
• Peter Schreiber · Jena, DE

Key dates

• Filing date: Oct 5, 2007
• Grant date: Nov 23, 2010
• Expiry date: Nov 17, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/01
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A device for the homogenization of radiation, preferably light, using chirped microlens arrays (cMLA) from the established regular microlens arrays (rMLA), chirped microlens arrays are an arrangement of non-identical lenses in one array. Non-identical means that the lens parameters of the lenses of the array, such as e.g. the radius of curvature, the free diameter, vertex position, and others, can vary from lens to lens or cell to cell. The parameters of each lens or cell can be determined by functions (analytically, numerically), the functions preferably being dependent upon the position of the cell or the lens in the array.