Light attenuator and process for fabrication thereof

Optical waveguides – Accessories – Attenuator

Patent

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Details

385 78, G02B 636

Patent

active

051134764

ABSTRACT:
Disclosed is a light attenuator comprising a stick or rod composed of a light-transmitting material, and a light-attenuating layer composed of a thermoplastic resin and formed on at least one end face of the stick or rod, wherein finely divided particles having a light-absorbing or light-scattering property are uniformly incorporated in the thermoplastic resin. This light attenuator is made by forming a light-attenuating thermoplastic resin layer having incorporated therein the light-absorbing or light scattering finely divided particles on a release film or paper; placing the light-attenuating layer formed on the release film or paper on a heating plate; press-bonding the end face of a rod or stick composed of a light-transmitting material inserted and set in a ferrule to the surface of the release film or paper; cooling the bonded assembly; and then peeling the release film or paper to transfer the light-attenuating layer to the end face of the light-transmitting rod or stick.

REFERENCES:
patent: 4461539 (1984-07-01), Bailey et al.
patent: 4477146 (1984-10-01), Bowen et al.
patent: 4639078 (1987-01-01), Sheem
patent: 4666243 (1987-05-01), Rogstradius et al.
patent: 4925514 (1990-05-01), Okada et al.

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