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Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0464647-A3-19920617
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EP-0464647-A3-19920617
An optical spherical Luneburg lens is described which is also useful for millimeter wave and microwave operation, which cam provide a multitude of simultaneously acting receiving beams over a hemispherical or spherical field of view. When used in conjunction with surface mounted optical/radio frequency pickup elements, the lens can be employed in a passive target detection system of unique field of coverage and sensitivity. The lens comprises a center sphere of refractive index of approximately √2, around which are arranged in concentric shells of aerogel material. The aerogel material of the respective shells is fabricated to obtain a particular index of refraction approximately equal to (2-(r/r₀)²)1/2, where r is the radius of the shell and r₀ is the radius of the lens assembly. The lens can be employed in a system providing dual mode simultaneous optical and radio frequency operation with a single aperture. Its multibeam simultaneous detection capability can provide an input to advanced digital signal processors to perform automatic image and pattern recognition for commercial and military sensor systems. It may also be used as an active sensor using optical or radio frequency energy.
An optical spherical Luneburg lens is described which is also useful for millimeter wave and microwave operation, which cam provide a multitude of simultaneously acting receiving beams over a hemispherical or spherical field of view. When used in conjunction with surface mounted optical/radio frequency pickup elements, the lens can be employed in a passive target detection system of unique field of coverage and sensitivity. The lens comprises a center sphere of refractive index of approximately √2, around which are arranged in concentric shells of aerogel material. The aerogel material of the respective shells is fabricated to obtain a particular index of refraction approximately equal to (2-(r/r₀)²)1/2, where r is the radius of the shell and r₀ is the radius of the lens assembly. The lens can be employed in a system providing dual mode simultaneous optical and radio frequency operation with a single aperture. Its multibeam simultaneous detection capability can provide an input to advanced digital signal processors to perform automatic image and pattern recognition for commercial and military sensor systems. It may also be used as an active sensor using optical or radio frequency energy.
en
European Patent Office
EP0464647
EP 0464647
G02B 06/12
H01Q 15/08
H01Q 19/06
Multibeam optical and electromagnetic hemispherical/spherical sensor
Multibeam optical and electromagnetic hemispherical/spherical sensor - European Patent Office - EP 0464647 A3
Multibeam optical and electromagnetic hemispherical/spherical sensor - European Patent Office - EP 0464647 A3
Adobe PDF Library 8.0
"EP0464647"; "EP 0464647"; "G02B 06/12"; "H01Q 15/08"; "H01Q 19/06"; "Multibeam optical and electromagnetic hemispherical/spherical sensor"
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0464647
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1992-06-17
91110582
1991-06-26
US
545313
1990-06-27
G02B 06/12
H01Q 15/08
H01Q 19/06
HUGHES AIRCRAFT COMPANY
Baller, Howard
Grünecker, Kinkeldey,Stockmair & SchwanhäusserAnwaltssozietät
Multibeam optical and electromagnetic hemispherical/spherical sensor
Optischer und elektromagnetischer halbkugelförmiger/kugelförmiger Mehrstrahlsensor
Multibeam optical and electromagnetic hemispherical/spherical sensor
Capteur optique et électromagnétique hémisphérique/sphérique à faisceaux multiples
An optical spherical Luneburg lens is described which is also useful for millimeter wave and microwave operation, which cam provide a multitude of simultaneously acting receiving beams over a hemispherical or spherical field of view. When used in conjunction with surface mounted optical/radio frequency pickup elements, the lens can be employed in a passive target detection system of unique field of coverage and sensitivity. The lens comprises a center sphere of refractive index of approximately √2, around which are arranged in concentric shells of aerogel material. The aerogel material of the respective shells is fabricated to obtain a particular index of refraction approximately equal to (2-(r/r₀)²)1/2, where r is the radius of the shell and r₀ is the radius of the lens assembly. The lens can be employed in a system providing dual mode simultaneous optical and radio frequency operation with a single aperture. Its multibeam simultaneous detection capability can provide an input to advanced digital signal processors to perform automatic image and pattern recognition for commercial and military sensor systems. It may also be used as an active sensor using optical or radio frequency energy.
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