James H Rector

US Patent:

6635892, Oct 21, 2003

Filed:

Feb 28, 2002

Appl. No.:

10/085506

Inventors:

Larry Calvin Nunley - Madison AL
Gianluigi Mucci - Anderson AL
James Brian Rector - Harvest AL
Timothy Michael Sears - Huntsville AL
Glen Alan Dace - Huntsville AL

Assignee:

PEI Electronics, Inc. - Huntsville AL

International Classification:

G21G 400

US Classification:

2504931, 2504951, 250504 R

Abstract:

A small and compact infrared scene projector allows for projection of infrared images from a variety of sources. The unit utilizes an external power supply to reduce the weight of the unit and has several input pathways such as an integrated RS-232 serial port and a video port for receiving RS-170 formatted video signals. The projector uses a digital signal processor to control its internal electronics and for on-board generation of pre-programmed infrared images. A processor electronics card and a scene generator electronics card communicate internally to generate images and to control a thermoelectric cooling device mounted to a semiconductor infrared emitter array to project flicker free, high resolution infrared images. Optics in the form of an interchangeable lens or a mirrored collimator allow for projection of a generated image onto a test object. Internal high speed memory and electrically erasable firmware, both externally programmable, allow for on-the-fly programming and self-sustaining and continued operation after disconnection from a separate programming computer.