Ellipticized optical lens providing balanced astigmatism

Details Ellipticized optical lens providing balanced astigmatism Ellipticized optical lens providing balanced astigmatism

1980-04-09

1981-12-22

Corbin, John K.

G02B 304

Patent

active

043067778

ABSTRACT:
An ellipticized singlet azimuth versus elevation optimized and aperture eemized nonspherical optical lens of very low or even minimal F-number providing balanced astigmatism for wide angle optical applications is described. The optical lens has an elliptical periphery and surfaces defined by a system of nonlinear partial differential equations, the surfaces acting together to produce two perfect primary off-axis foci F and F' at a finite distance in back of the lens and two perfect conjugate off-axis foci F.sub..infin. and F'.sub..infin. in front of the lens at infinity; i.e., the optical lens simultaneously focuses energy from the primary foci F and F' into two off-axis parallel ray plane wave beams directed towards infinity at equal but opposite angles with respect to the optical lens axis. The optical lens may be built of various materials such as any of several barium flint glasses.

REFERENCES:
patent: 2736894 (1956-02-01), Kock
patent: 3146451 (1964-08-01), Sternberg
patent: 3958559 (1976-05-01), Glenn et al.

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