Patent ID: 8218139

Claim:
An optical reimaging element comprising: a first off-axis parabolic mirror having only the portion of the mirror surface below the first plane that passes through its focal point and is perpendicular to the axis of the first parabola associated with said first mirror, said portion of said first mirror being on the same side of said first plane as the vertex of said first parabola; a second off axis parabolic mirror identical to the first mirror also having only the portion of the mirror surface below the second plane that passes through its focal point and is perpendicular to the axis of the second parabola associated with said second mirror, said portion of said second mirror being on the same side of said second plane as the vertex of said second parabola; and said first and second mirrors being in optical communication with each other so that their said first and second planes coincide and so that their parabolic mirror surfaces are symmetrically opposing, confocal, and coaxial thereby having the property that a ray of light coming from the common focal point of said parabolic mirrors and incident onto one of said parabolic mirrors reflects to other said parabolic mirror wherein it reflects back to said focal point, but at an angle with the direction in which it left said focal point.