Trw Limited

Jay S Pearlman

Paul S Lee

John Joseph Berenz

Pei-Ming Daniel Chow

Wayne W Lam

A focal plane imaging array (FPIA) (16) for use in a direct detection imaging device (10) for conducting radiometric imaging at microwave and millimeter-wave frequencies is disclosed as having an internal electronic calibration source (36). The plurality of energy detecting pixel elements (14) which comprise the FPIA (16) include a detection circuit (34) and a calibration circuit (36). The calibration circuit (36) is uni-directionally coupled to the detection circuit (34) to allow a known calibration signal 'pulse' to be introduced into the detection circuit (34). The calibration pulse is processed by the pixel detection circuit and the output signal is compared with the pixel's responsivity value. Adjustments in the pixel gain and sensitivity may then be made as appropriate.

Focal plane imaging array with internal calibration source

A microwave locating system is provided for locating known features and distinguishing between different types of features. The locating system includes a plurality of modulated microwave power sources located on known features and radiating modulated microwave signals having modulated frequencies selected in accordance with the known features. A video detection sensor camera is located remote from the sources for sensing microwave signals within a field of view and providing location signals for each of the sources. The camera includes an array of receiver elements which provide narrow bandwidth filtering so as to identify received signals as one of a plurality of selected modulated frequencies. The locating system further provides an image of the location signals which distinguishes between different selected located features.

Growing community of inventors

Rancho Palos Verdes, CA, United States of America

Jay S Pearlman