Plastic optical fiber, optical fiber cable, plugged optical...

Details Plastic optical fiber, optical fiber cable, plugged optical... Plastic optical fiber, optical fiber cable, plugged optical...

2005-03-22

2005-03-22

Williams, Joseph (Department: 2879)

Optical waveguides

Having particular optical characteristic modifying chemical...

Of waveguide core

C385S126000

Reexamination Certificate

active

06871000

ABSTRACT:
The present invention relates to a production method of a plastic optical fiber which comprises the steps of heat drawing an undrawn plastic optical fiber obtained by melt spinning and annealing the drawn fiber at a circumferential velocity ratio between the front and rear rollers (circumferential velocity of a rear roller/circumferential velocity of a front roller) of 0.5 to 1.2 under heating conditions which satisfy 4≦y≦−1.5x+330 and (Tgc−5)° C.≦x≦(Tgc+110)° C. [Tgc: a glass transition temperature of a core, x: an annealing temperature (° C.), and y: an annealing time (seconds)]. According to the present invention, a plastic optical fiber having a small thermal shrinkage ratio and excellent heat resistance can be provided.

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