Imaging Infrared System with Extended Depth of Field Focusing

The objective of this proposal is to demonstrate an innovative optical detection and imaging system that will allow battlefield imaging through smoke, dust and fog obscurants in the 10 micron wavelength range. The Phase I effort will deliver a feasibility concept design and a prototype instrument. The system employs a multi-mode, diffraction-limited, infrared telescope that can operate either in a passive mode or in an active mode using 10.6 micron laser illumination. This is the first system of its kind, including the following innovative capabilities: 10 times improvement in the depth of field as compared to standard optical systems, uncooled microbolometer array for ease of operation, elimination of cat's eye reflection, use of narrow band filter in the active mode of operation to improve signal to noise performance, and computer controls for automated operation. The proposed, final system will be small, portable and designed for battlefield environments. The primary optics is 10 inches in diameter. Low cost is achieved through small size and use of state-of-the-art, commercially available components. The system is designed to operate in the range from 500 feet to 10 miles with a minimum of focus adjustment required because of the extended depth of field capability.