Method and device for producing a sharp picture of an end region

Optical waveguides – Miscellaneous

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G02B 600

Patent

active

060673974

ABSTRACT:
When imaging the end region of an optical fiber ribbon including individual optical fibers cameras are used which have lens systems and arrays of light sensitive CCD-elements which are connected through an image processing unit to a display monitor. The optical axes of the lens systems form an oblique angle, for example between 45 and 60.degree., to the plane through the optical fibers, so that the optical axes have an angle of for instance between 60 and 90.degree. to each other, in order to obtain pictures having sufficient amounts of information in regard of the positions of the fiber ends. To achieve a sharp picture of all of the fiber ends the CCD-array of a camera is located in an oblique angle to the optical axis of the lens system. This oblique angle is so selected, that the CCD-array is located in the plane, in which the pictures of the individual optical fibers are located. Conventionally the CCD-array would be placed perpendicularly to the optical axis of a camera, resulting in that then substantially only one fiber can be sharply imaged.

REFERENCES:
patent: 4911524 (1990-03-01), Itoh et al.
patent: 5158591 (1992-10-01), Onodera et al.
patent: 5313542 (1994-05-01), Castonguay

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