Coating processes – Optical element produced – Polarizer – windshield – optical fiber – projection screen – or...
Patent
1984-06-26
1986-06-03
Hoffman, James R.
Coating processes
Optical element produced
Polarizer, windshield, optical fiber, projection screen, or...
65 311, 204 20, 204 384, G02B 514, B05D 118
Patent
active
045929327
ABSTRACT:
An optical fiber which has just been drawn from an optical preform is provided with two external hermetic coatings. The primary coating is a metallic coating provided by, for example, using a heterogeneous nucleation thermochemical deposition technique. This technique involves passing the fiber through a reaction zone which contains a gaseous medium that includes a reactant which decomposes, or a mixture of reactants which chemically react, at a predetermined temperature to form the material of the coating. The second coating is provided by immersing the fiber in a deposition bath containing a liquid medium which includes at least one reactant capable of deposition onto the primary coating to form a secondary coating. The deposition process may be achieved by applying a current through the medium at a predetermined temperature or by including reactants in the medium which will deposit at predetermined temperatures without applying a current. The resulting fiber may then be provided with an additional polymer coating layer.
REFERENCES:
patent: 4390589 (1983-06-01), Geyling et al.
patent: 4418984 (1983-12-01), Wysucki et al.
patent: 4485122 (1984-11-01), Williams et al.
Biswas Dipak R.
Raychaudhuri Satyabrata
Hoffman James R.
ITT Corporation
O'Halloran John T.
Werner Mary C.
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