| US 7,576,791 B2 | ||
| Method and apparatus for signature reduction using wavefront coding | ||
| Jaime Sonstroem, Springfield, Va. (US) | ||
| Assigned to The United States of America as represented by the Secretary of the Army, Washington, D.C. (US) | ||
| Filed on Apr. 20, 2005, as Appl. No. 11/110,993. | ||
| Prior Publication US 2006/0238638 A1, Oct. 26, 2006 | ||
| Int. Cl. H04N 5/225 (2006.01); G01J 5/02 (2006.01) | ||
| U.S. Cl. 348—335 [250/352; 250/353] | 19 Claims |
| 1. A low-signature wavefront-coded electric-optic system comprising:
at least one lens;
a phase plate;
a focal plane array; and
a means to reconstruct an image
wherein the phase plate has been specifically designed and positioned within the system such that light originating from an
external source and entering the system, passes through the phase plate, reflects off the focal plane array, passes again
through the phase plate and exits the system and is not retroreflected back to the source.
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