Process for gradient refractive index optical objects

Details Process for gradient refractive index optical objects Process for gradient refractive index optical objects

1997-11-25

2000-07-25

Bell, Janyce

Coating processes

Optical element produced

Polarizer, windshield, optical fiber, projection screen, or...

4272554, 4273935, 427399, 427508, 427509, 427514, B05D 506

Patent

active

060934484

ABSTRACT:
An improved process, preferably continuous, for the manufacture of gradient refractive index optical objects, wherein a core polymer, which itself may be prepared by a continuous and incorporated process, is passed through a hollow porous surrounding, generally cylindrical so as to obtain and maintain a rounded fiber, through which is fed a second monomer whose polymer has a lower refractive index than the core polymer, so as to swell the core polymer. The swollen polymer with a gradient of swelling by the second monomer from surface to core, is then led to a polymerization unit to complete the polymerization before equilibration of the second monomer throughout the core polymer occurs. The resulting polymers are useful in the preparation of optical fibers and light pipes.

REFERENCES:
patent: 3955015 (1976-05-01), Ohtsuka et al.
patent: 3999834 (1976-12-01), Ohtomo et al.

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