Process and apparatus for spherically curving an end of an optic

Details Process and apparatus for spherically curving an end of an optic Process and apparatus for spherically curving an end of an optic

1980-12-05

1982-08-24

Lowe, James B.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65 2, 65 12, 65158, 65292, 264 15, 264 27, 264 401, B29D 1100, C03B 3714

Patent

active

043459307

ABSTRACT:
In order to provide an end face of an optical fiber with a spherical curvature of predetermined radius, designed to optimize the transfer of luminous intensity from an adjoining light source such as a light-emitting diode, a flat fiber is heated to a temperature near its melting point while its profile is optically enlarged. When that profile is found to have reached a predetermined shape criterion, as determined by visual observation or by electronic scanning, heating is terminated.

REFERENCES:
patent: 2189860 (1940-02-01), Frei, Jr.
patent: 2300917 (1942-11-01), Gaskill
patent: 2530692 (1950-11-01), Gage
patent: 3113010 (1963-12-01), Willis et al.
patent: 3486875 (1969-12-01), Pymm
patent: 4280827 (1981-07-01), Murphy et al.
"Design Criteria for Optimum Coupling between a High Radiance LED and a Bulb-Ended Fiber", Basola et al., CSELT Rapporti Technici, vol VI, N. 4, Dec. 1978, pp. 279-285.

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