Luneburg lens

A Luneburg lens can be used as the basis of a high-gain radio antenna.

The drone could carry Luneburg lenses to give an enhanced radar signature.

A radar reflector can be made from a Luneburg lens by metallizing parts of its surface.

A Luneburg lens antenna offers a number of advantages over a parabolic dish.

Luneburg lenses are one type of gradient-index lens.

Maxwell's fish-eye lens is also an example of the generalized Luneburg lens.

Examples of such a theoretically perfect system include the Luneburg lens and the Maxwell fish-eye.

A typical Luneburg lens's refractive index n decreases radially from the center to the outer surface.

Cylindrical analogues of the Luneburg lens are also used for collimating light from laser diodes.

This uses just one hemisphere of a Luneburg lens, with the cut surface of the sphere resting on a reflecting metal ground plane.

Each point on the surface of an ideal Luneburg lens is the focal point for parallel radiation incident on the opposite side.

This method has resulted in a plasmonic type of Luneburg lens and Eaton lens.

In practice, Luneburg lenses are normally layered structures of discrete concentric shells, each of a different refractive index.

Shaped like a pyramid, the ZAR featured a Luneburg lens receiver aerial weighing about 1,000 tons.

In refractive corneas, the lens tissue is corrected with inhomogeneous lens material (see Luneburg lens), or with an aspheric shape.

Consequently it is necessary to use a variety of Luneburg lens that focusses somewhat beyond its surface, rather than the classic lens with the focus lying on the surface.

Payloads of the drone are passive radar cross-section enhancer (Luneburg lens), acoustic miss distance indicator (MDI), infrared flares and smoke.

The reflector, a type of Luneburg lens, was developed and manufactured by the Institute for Precision Instrument Engineering (IPIE) in Moscow.

A Luneburg lens (originally Lüneburg lens, often incorrectly spelled Luneberg lens) is a spherically symmetric lens that has varying index of refraction inside it.

A variation on the Luneburg lens antenna is the hemispherical Luneburg lens antenna or Luneburg reflector antenna.

Apart from offset systems, dish antennas suffer from the feed and its supporting structure partially obscuring the main element (aperture blockage); in common with other refracting systems, the Luneburg lens antenna avoids this problem.

A Luneburg Lens for the SKA Summary of the MNRF research project into the manufacture of a low-cost microwave refracting spherical lens for radioastronomy, proposes the use of artificial dielectrics.