Accession Number : ADD007849

Title :   Ellipticized Lens Providing Balanced Astigmatism

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sternberg,Robert L

Report Date : 23 Sep 1980

Pagination or Media Count : 7

Abstract : An ellipticized singlet azimuth versus elevation optimized and aperture extremized nonspherical lens antenna of very low or even minimal F-number providing balanced astigmatism for wide angle acoustic, microwave or optical applications is described. The lens has an elliptical periphery and surface defined by a system of nonlinear partial differential equations, the surfaces acting together to produce two perfect primary off-axis foci F and F prime at a finite distance in back of the lens and two perfect conjugate off-axis foci F infinity and F prime infinity in front of the lens at infinity; i.e., the lens simultaneously focuses energy from the primary foci F and F prime into two off-axis parallel ray plane wave beams directed towards infinity at equal but opposite angles with respect to the lens axis. The lens may be built of various materials depending on its intended application in acoustics, microwaves or optics. (Author)

Descriptors :   *Patents, *Optical lenses, Balance, Astigmatism, Partial differential equations, Acoustics, Microwave equipment, Optics

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE