Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1979-09-25
1981-09-15
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350320, 356138, G02B 514
Patent
active
042893747
ABSTRACT:
The invention relates to a method of and a device for providing an outer surface of an envelope which is concentric to a light-conductive core, around a monomode optical fiber. According to the invention, the eccentricity of the fiber and the envelope may be for example, 0.1 .mu.m for a core diameter of 3 .mu.m. This accuracy is acieved by splitting a light beam, emerging from the end of a fiber which is clamped in an envelope, into two subbeams by means of rotating optical means, each of the beams producing a circular image. By a suitable choice and adjustment of the optical means, the two light beams will form oppositely moving images when the fiber end is displaced with respect to the axis of rotation and observation. When the images are concentric, the fiber end is situated on the axis of rotation. Machining of the envelope by the use of a tool which rotates around the axis of rotation results in an envelope which is concentric to the light-conductive core of the fiber.
REFERENCES:
patent: 3902784 (1975-09-01), Dakss et al.
patent: 3938895 (1976-02-01), Bridger et al.
patent: 3998554 (1976-12-01), Burch et al.
patent: 3999841 (1976-12-01), Dakss et al.
patent: 4167304 (1979-09-01), Gelbke
Sullivan, "Alignment of Rotational Prisms", Applied Optics, vol. 11, No. 9, Sep. 1972, pp. 2028-2032.
Nicia, "Practical Low-Loss Lens Connector for Optical Fibres", Electronics Letters, vol. 14, No. 16, Aug. 1978, pp. 511-512.
Franken Adrianus J. J.
Khoe Giok D.
Kuyt Gerard
Nicia Antonius J. A.
Potters Cornelis J. T.
Corbin John K.
Lee John D.
Schechter Marc D.
U.S. Philips Corporation
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