| 摘要 |
<p>1,155,795. Coated glass. CARL-ZEISS-STIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN]. 6 June, 1967 [8 June, 1966], No. 26072/67. Addition to 1152953. Heading B2K. [Also in Division G2] A light guide comprises a glass rod or a bundle of glass fibres capable of conducting U.V. or visible light coated with a transparent wholly fluorinated aliphatic polymer or copolymer of lower refractive index in optical contact therewith. The polymer may be a copolymer of tetrafluoroethylene and hexafluoropropylene having a refractive index of 1.355, and the glass may be quartz glass of refractive index 1.475, optical glass with a refractive index of 1.544 or glass with refractive index of 1.62, all indices being at 365Á. The rod or fibres may be coated by drawing them vertically upwards from an aqueous dispersion of the polymer or copolymer, and 'the dispersing agent removed by heating at 280-320‹C.</p> |
