The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1992
Filed:
Feb. 22, 1991
Hiroaki Nishimoto, Osaka, JP;
Takayuki Mishima, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical fiber which comprises a core made of a glass material, a thin plastic cladding formed on the peripheral surface of the core and a plastic coating formed on the plastic cladding, and satisfies the conditions (1) a specific refractive index of cladding resin after curing being 0.970 to 0.985 times that of the core periphery at a practical wavelength at ambient temperature, (2) light transmission through the cladding resin after curing being 500 to 4000 dB/km at a practical wavelength, and (3) a coefficient of linear expansion of the cladding resin after curing being not larger than 2.0.times.10.sup.-4 /.degree.C., which optical fiber has a wide band-width and high NA.