Method and apparatus for determining cleave end angle of an opti

Details Method and apparatus for determining cleave end angle of an opti Method and apparatus for determining cleave end angle of an opti

1990-11-14

1992-08-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 2186, G01C 308

Patent

active

051401673

ABSTRACT:
A method of testing a length section of optical fiber in order to determine whether the angle between an end face of the length section and a plane perpendicular to a longitudinal axis of the length section of optical fiber is within a predetermined range, comprises positioning the length section of optical fiber so that its longitudinal axis substantially coincides with the optical axis of a camera, selecting at least two test regions on the end face of the fiber, adjusting the position of at least one of a camera, a lens and the length section of optical fiber to focus each of the test regions on the sensing surface of the camera, and comparing the adjustments performed in the preceding step for the two test regions respectively.

REFERENCES:
patent: 4092068 (1978-05-01), Lucas et al.
patent: 4571084 (1986-02-01), Wright
patent: 4629324 (1986-12-01), Stern
patent: 4640620 (1987-02-01), Schmidt
patent: 4657393 (1987-04-01), Stern
patent: 4743771 (1988-10-01), Sacks et al.
patent: 4920273 (1990-04-01), Sacks et al.

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