Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-05-09
1990-10-30
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
343770, N01J 4014
Patent
active
049670778
ABSTRACT:
A plurality of subaperture arrays which may be disposed within the diameter of the conventional single large aperture in order to achieve improved sidelobe energy characteristics with respect to that of the single large aperture. The apertures may be embodied as optical sources or radio frequency energy sources. The preferred arrangements of the subapertures include dispositions on concentric circles circumscribed within the single large aperture with a single aperture at the center of the large aperture and six, twelve, eighteen, twenty four and so on subapertures disposed on each subsequent concentric circle. One particularly attractive subaperture arrangement includes a total of nineteen subapertures with the outer concentric circle twelve of these subapertures being slightly rotated with respect to those of the inner concentric circles.
REFERENCES:
patent: 1860123 (1932-05-01), Yagi
patent: 2837728 (1958-06-01), Schuck
patent: 3495263 (1970-02-01), Amitay et al.
patent: 3502387 (1970-03-01), Hadley
patent: 3633208 (1972-01-01), Ajioka
patent: 4236161 (1980-11-01), Ohm
patent: 4639586 (1987-01-01), Fender et al.
patent: 4725138 (1988-02-01), Wirth et al.
patent: 4797682 (1989-01-01), Klimczak
Watson, S. M., Mills, J. P., and Rogers, S. K. "Two-Point Resolution Criterion for Multi-Aperture Optical Telescopes," Journal of the Optical Society of American A. vol. 5. Jun. (1988).
Shack, R. V., Ramcourt, J. D., and Morrow H. "Effects of Dilution on a six-Element Synthetic Aperture," Applied Optics 10, 257-259 (1971).
Born, M. and Wolf, E. Principles of Optics. New York: Pergamon Press, 1980.
Toraldo Di Francia, G. "Super-Gain Antennas and Optical Resolving Power." Suppltemento Al vol. XI, Series Del Nuovo Cimento, 426, 1952.
Goodman, Joseph W. Introduction to Fourier Optics. San Francisco: McGraw-Hill, 1968.
Tsuchunko, J. F. A. and Sheehan, P. J. "Aperture Configuration and Imaging Performance," Applied Optics, 10, No. 6, 1432-1438, Jun. (1971).
Hollins Gerald B.
Le Que Tan
Nelms David C.
Singer Donald J.
The United States of America as represented by the Secretary of
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