System for monitoring spaces by electro-optical means

US3972021A · kind A · utility

Inventors

• Ludwig Leitz
• Knut Heitmann · Wetzlar, DE
• Eckart Schneider

Key dates

• Filing date: May 21, 1975
• Grant date: Jul 27, 1976
• Expiry date: May 21, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G08G1/04
• WIPO field: Control
• WIPO sector: Instruments

Abstract

System for monitoring spaces by electro-optical means, using optical imaging means (1) capable of detecting objects present in the monitored spaces and beam splitting means (2) for grating resolution of the object images into geometric, mutually complementary components. The imaging and beam splitting means form a correlation imaging sensor system equipped with photoelectric detectors (4,5) for the purpose of separately converging light fluxes corresponding to the image components into analogue electrical signals, and electrical means for measuring the amplitudes and phases of the signals as well as their variations. The correlation sensor system analyzes these values with respect to presence and/or motion of objects within the monitored spaces.