Manufacture of concentric coatings for fiber waveguides

Details Manufacture of concentric coatings for fiber waveguides Manufacture of concentric coatings for fiber waveguides

1981-02-23

1982-12-14

Hoffman, James R.

Coating processes

Measuring, testing, or indicating

65 311, 65 29, 427 10, 427163, C02B 514, B05D 506, B05D 118

Patent

active

043638279

ABSTRACT:
The forward scattering pattern from a transversely-illuminated polymer-coated optical fiber can be used to insure well-centered coatings on optical fibers. A simple interpretation of the scattering pattern provides an error signal to guide compensatory coating cup alignment. For polymers coating materials with a refractive index higher than that of silica, the scattering pattern contains caustic surfaces. If the coating is eccentric in a direction perpendicular to the incident rays, the positions of the caustic surfaces vary monotonically with eccentricity.

REFERENCES:
patent: 4042723 (1977-08-01), Presby
patent: 4067651 (1978-01-01), Watkins
patent: 4124728 (1978-11-01), Marcuse et al.
Eichenbaum, "Laser-Aided Alignment of Coating Dies on Fiber Drawing Lines: Theory and Practice", Abstract TVBB4, Cleus/ICF '80, Feb. 26-28, 1980.
Applied Optics, vol. 16, No. 9, Sep. 1977, pp. 2383-2390.
The Bell System Technical Journal, vol. 55, No. 10, Dec. 1976, pp. 1525-1537.
The Bell System Technical Journal, vol. 59, No. 3, Mar. 1980, pp. 313-332.

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