Optical diffuser plates

US6424406B1 · kind B1 · utility

Assignee

• ROEHM GMBH & CO. KG · DE

Inventors

• Michael Mueller · Gifhorn, DE
• Volker Benz · Kelsterbach, DE
• Michael Meier-Kaiser · Pfungstadt, DE
• Hans Lorenz · Darmstadt, DE
• Volker Mende · Darmstadt, DE
• Helmut Haring · Otzberg, DE
• Berthold Schoenig · Roßdorf, DE

Key dates

• Filing date: Jul 7, 1999
• Grant date: Jul 23, 2002
• Expiry date: Jul 7, 2019

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E06B2009/2417
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

The invention relates to optical diffuser plates (1) made of transparent plastics such as polycarbonate or polymethacrylate. Several thin strips (2) made of plastic B inserted into plates made of transparent plastic A with the proviso that A and B are incompatible and the strips (2) made of plastic B are subsequently withdrawn. The hollows that are formed in the plate (1) made of plastic A are used to deflect light.