Method and apparatus for constructing microlens ends for optical

Details Method and apparatus for constructing microlens ends for optical Method and apparatus for constructing microlens ends for optical

1984-10-22

1987-07-07

Lee, John

Electric heating

Microwave heating

Tunnel furnace

219121LF, 350320, 350417, G02B 632

Patent

active

046782680

ABSTRACT:
The method for constructing microlens ends for optical fibres, particularly for biomedical and/or surgical use, is characterised by propagating in the optical fibre a radiation of the type used during the application of the fibre itself, and to which said fibre is transparent, and converting the wavelength of the radiation, outside to the fibre and in proximity to its output end, which has been previously cut along a plane orthogonal to its axis, into a band of wavelengths which can be absorbed by the fibre, for a time sufficient to cause localized fusion of the end. In order to implement this method, the invention also provides for the use of a device comprising a block of material which converts radiation and is provided with a flat surface, a support which keeps the fibre orthogonal to said flat surface and with its previously cut end facing said flat surface, and means for varying in a controlled manner, preferably by micrometric regulation, the distance between the fibre end and the said flat surface of the block of material.

REFERENCES:
patent: 4147402 (1979-04-01), Chown
patent: 4383731 (1983-05-01), Simon et al.
Paek, U. C. and Weaver, A. L. "Formation of a Spherical Lens at Optical Fiber Ends with a CO.sub.2 Laser," Applied Optics, vol. 14, No. 2 (2-1975), pp. 294-298.

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