Scanning tip for optical radiation

Details Scanning tip for optical radiation Scanning tip for optical radiation

1989-10-27

1991-02-19

Hille, Rolf

Communications: radio wave antennas

Antennas

Wave guide type

343785, H01Q 1300

Patent

active

049948180

ABSTRACT:
Scanning tip for electromagnetic radiation having wavelengths below about 3 cm comprising a waveguide (10) which acts as high-frequency hollow waveguide and which comprises a wall (12) of an electrically conductive material and the internal cross-section of which diminishes from a point at which it has a magnitude which permits unrestricted propagation of the radiation perpendicularly to the cross-sectioin to an end aperture (14) having a dimension (s) which is small in comparison with the wavelength of the radiation, having a rod (20) which comprises an electrically conductive surface which is electrically insulated with respect to an electrically conductive inner wall of the hollow waveguide and extends from the aperture (14) at least up to said location (z=0).

REFERENCES:
patent: 2307011 (1943-01-01), Barrow
patent: 2548821 (1951-04-01), Riblet et al.
patent: 2685068 (1954-07-01), Goubau
patent: 3588754 (1971-06-01), Hafner
patent: 4528528 (1985-07-01), Augustin
E. A. Ash et al., Nature vol. 237, Jun 30, 1972, pp. 510-512.
Optical Stethoscopy: Image Recording with Resolution, D. W. Pohl, W. Denk d M. Lanz-Apr. 1, 1984, pp. 651-653.

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