Multifilament type plastic optical fiber and process for prepara

Details Multifilament type plastic optical fiber and process for prepara Multifilament type plastic optical fiber and process for prepara

1989-03-08

1991-08-13

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 16, 264171, 2641771, 26417713, 2642108, D01F 804

Patent

active

050394576

ABSTRACT:
A multifilament type plastic optical fiber having a substantially rectangular cross-section and an islands-in-the-sea structure in which 100 to 10,000 islands are arranged in the sea, wherein the respective islands have a substantially circular cross-section and a core-sheath structure, the islands are arranged in a zigzag-stacked structure, the core occupaney ratio in the multifilament type optical fiber cores section is at least 50% and the brightness index value I which is defined by the following (1), is at least 4.5.times.10.sup.-2 : ##EQU1## wherein S stands for the core occupancy ratio in the multifilament type optical fiber, .alpha. stands for the transmission loss (dB/m) per meter of the multifilament type optical fiber, NA stands for the numeral apertures, and L stands for the length (m) of the used optical fiber.

REFERENCES:
patent: 3556635 (1971-01-01), Schrenk et al.
patent: 4352550 (1982-10-01), Uchida
patent: 4564261 (1986-01-01), Kojima et al.
patent: 4690500 (1987-09-01), Hayami et al.
patent: 4732716 (1988-03-01), Sakunaga et al.

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