Trw Limited

Thomas K Samec

Mikio L Yujiri

Paul S Lee

Merit M Shoucri

Barry H Stark

A passive millimeter-wave imaging system (,) is disclosed that provides a full 360&deg; instantaneous azimuthal field-of-view (,) image of a scene. The imaging system (,) makes use of a spherical Luneburg lens (,) and a series of millimeter-wave direct detection receivers (,) configured in a ring (,) around the lens (,), and positioned at the focal plane of the lens (,). The series of receivers (,) are positioned on a plurality of consecutive sensor cards (,), where each card (,) includes a certain number of the receivers (,). The receivers (,) define a one-dimensional focal plane array with limited obscuration, and thus give a 360&deg; instantaneous field-of-view (,) of a slice of the scene. Processing circuitry (,), including a multiplexing array interface for multiplexing the signals from the receivers (,), are positioned on an outer ring (,) outside of the sensor card ring (,). Mechanical actuators (,) are provided to cause the rings (,) to move together in a precessional motion about the lens (,) so that the rings (,) precess at a fixed angle &THgr; about a fixed reference direction (,), thus providing an elevational scan of &plus;/&minus;&THgr; about the plane perpendicular to the reference direction (,).

Millimeter wave all azimuth field of view surveillance and imaging system

An anti-reflection coating for optical elements and a method for forming an anti-reflection coating on an optical element includes one or more layers of a woven plastic mesh material that may be layered on the surface of an optical element such as the lens and secured thereto with a suitable adhesiveor pressed on to the surface by either a peripheral retaining ring or bodily pressed in place by a low loss, low dielectric medium. The number and thickness of the layers of the woven plastic mesh material are selected to provide optimal reduction of reflection losses.

Growing community of inventors

Los Angeles, CA, United States of America

Thomas K Samec