Autonomous Extended Depth of Field for Imaging Sensors

"Physical Sciences Inc. (PSI) proposes to develop a closed loop focus control system based upon interactions of the human visual system with a novel NVD optical design. The common feature of existing auto-focus systems is that they depend directly in someway on some information contained in the scene being imaged. The proposed control system uses a key parameter needed to control focus which is totally independent of the visual scene, which renders it insensitive to background clutter. In Phase I, PSIproposes to use this visual property to extract focus control commands directly from the operator's eyes themselves to produce an accommodating night vision device (ANVD). With the needed focus range and speed, the proposed focus control approach becomesa simple electro-optical extension of the human visual fixation reflex, without compromising image quality or covert operation. This capability would constitute a revolutionary advance in the man-machine interface for defense NVD systems to bring anytarget to focus, all the operator need do is look at it. Compact, low-cost, sensor technology will be designed and demonstrated in the proposed Phase I Program to prove feasibility. The military and civilian applications of night vision systems representa large market. The proposed focus control approach will significantly enhance performance of man-portable binocular devices, from aviator's heads up displays to hand-held and helmet-mounte