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Patent Searching and Data


Title:
OPTICAL SWITCH
Document Type and Number:
Japanese Patent JPS5714807
Kind Code:
A
Abstract:
An optical switch (10) is interposed between two light paths (12,14) comprising optical fibres (20,22) and focusing elements (24,26). The switch includes a toroidal enclosure (28) filled with a transparent fluid 40 and a ferrofluid pellet (30) whose rest position is below the space between the light paths which are coupled through the transparent fluid. Electrical coils (32,34) surround the focusing elements and are energisable to generate a magnetic field to move the ferrofluid pellet to a position between the light paths, in which the opacity of the ferrofluid uncouples the light paths. Additional coils (36,38) may be energised to return the ferrofluid pellet upon de-energisation of the coils (32,34).

Inventors:
MAIKERU JIYON BURADEI
ROORENSU BINSENTO GUREGOO
MAAKU JIYONSON
Application Number:
JP7152381A
Publication Date:
January 26, 1982
Filing Date:
May 14, 1981
Export Citation:
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Assignee:
IBM
International Classes:
F16C32/00; G02B6/35; G02B26/02; G02B26/08; H02K44/02; (IPC1-7): G02B5/00; G02B5/14
Domestic Patent References:
JP37000781A
JPS4823452A