Infrared detector

US5015857A · kind A · utility

Inventors

• Walter Bross · Überlingen, DE
• Hans Kordulla · Singen, DE
• Robert Rid · Markdorf, DE

Key dates

• Filing date: Mar 13, 1990
• Grant date: May 14, 1991
• Expiry date: Mar 13, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V8/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a multi-element infrared detector a light guide is arranged in front of each detector element, the dimensions of this light guide causing attenuation of radar radiation. Each light guide is formed by a light guiding passage having reflecting and electrically conductive inner walls. The light guiding passages are formed in a passage plate. The surface of the passages are electrically conductive and connected to signal ground. A light stop plate is arranged in front of the passage plate. This light stop plate has light stop apertures in alignment with the light guiding passages. The apertures have non-reflecting inner surfaces. The light stop plate reduces stray radiation.