Device for imaging test objects using electromagnetic waves, in particular for inspecting people for suspicious items

US8169355B2 · kind B2 · utility

Assignee

• SMITHS HEIMANN GMBH · DE

Inventors

• Bernd Bartscher · Wiesbaden, DE
• Uwe Flehmig · Wiesbaden, DE
• Michael Jeck · Mainz, DE

Key dates

• Filing date: Aug 21, 2009
• Grant date: May 1, 2012
• Expiry date: Oct 21, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/9088
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

To depict test objects using electromagnetic waves, particularly to check people for suspicious articles, an apparatus is provided having: an antenna which emits electromagnetic waves, particularly millimetric waves, means for concentrating the emitted waves in three dimensions, and means for manipulating the waves at the point of high concentration such that this point serves as a moving virtual antenna for SAR evaluation. Whereby the means for three-dimensional concentration contain a rotatably mounted, focusing or defocusing, quasi-optical element and the means for manipulating the waves at the point of high concentration contain a reflector. In accordance with the invention, the quasi-optical element and the reflector are rotatably mounted about a common rotary axis and at the same angular velocity.