Columnar focal lens

Details Columnar focal lens Columnar focal lens

1998-06-17

1999-05-04

Epps, Georgia

Optical: systems and elements

Lens

359664, 359707, 372101, G02B 300, G02B 1320, H01S 308

Patent

active

059009861

ABSTRACT:
A lens is described that produces a columnar focus comprised of a continuum of focal points at varying distances from the principal plane of the lens aligned along the axis of the lens. The lens refracts an incident wavefront with a focal length that is dependent upon the radial distance from the axis of the lens. The radii of curvature of the primary surface of the lens is dependent upon the desired length of the focal column.

REFERENCES:
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patent: 4830454 (1989-05-01), Karstensen
patent: 5268920 (1993-12-01), Esterowitz et al.
patent: 5315614 (1994-05-01), Grace et al.
patent: 5692005 (1997-11-01), Maag et al.
J.R. Vaill, D. A. Tidman, T.D. Wilkerson, D. W. Koopman, "Propagation of High-voltage Streamers Along Laser-induced Ionization Trails," Appl. Phy. Ltrs., vol. 17, No. 1, pp. 20-22, Jul. 1, 1970.
T. J. Dwyer et al., "On the Feasibility of Using an Atmospheric Discharge Plasma as an RF Antenna," IEEE Trans. on Antennas and Propagation, vol. APPLICATION-32, No. 2, pp. 141-146, Feb. 1984.

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