Waveguide for an optical near-field microscope

Details Waveguide for an optical near-field microscope Waveguide for an optical near-field microscope

1985-12-20

1988-02-16

Kyle, Deborah L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 9624, 350523, H01J 516

Patent

active

047257270

ABSTRACT:
The waveguide comprises a transparent body having a very sharp point at one end and being coated with a first opaque layer, such as metal. The first opaque layer carries a layer of an optically transparent material which is covered, in turn, by a second opaque layer. The apex of the point has been removed so as to expose the transparent body through a first aperture and to expose the transparent layer through a second aperture, the first aperture occupying an area of less than 0.01 .mu.m.sup.2.
Light enters the transparent body at its remote end and exits through the first aperture to illuminate an object. Reflected light from the object enters the transparent layer through the second aperture and is guided to a light detector for further processing.

REFERENCES:
patent: 3554721 (1971-01-01), Gardner
patent: 4000416 (1976-12-01), Goell
patent: 4407561 (1983-10-01), Wysocki

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