A mechanical structure to realize the rotation of optical fiber along the axis

Abstract

The invention belongs to the field of micro-processing on special optical fibers, particularly relates to a two-dimensional calibration mechanism used with CCD (charge coupled device) imaging systems, and discloses a mechanical structure for enabling optical fibers to axially rotate. The mechanical structure for enabling the optical fibers to axially rotate is applied to axially rotationally processing the optical fibers and comprises a circular pillow block cover, pillow blocks, two displacement precision bolts in Y-axis directions, two displacement precision bolts in X-axis directions, an optical fiber fixture carrier and an optical fiber fixture. Guide rail grooves are formed in two sides of each pillow block, guide rails in the X-axis directions are arranged inside the optical fiber fixture carrier, guide rails in the Y-axis directions are arranged on two sides of the optical fiber fixture carrier, the optical fiber fixture carrier is combined with the pillow blocks by the guide rails on the two sides of the optical fiber fixture carrier, and the pillow block cover is fixed to two sides of the pillow blocks by the aid of screws to be integrated with the pillow blocks. The mechanical structure has the advantages that the axes of the optical fibers can be aligned with the centers of rotary mechanisms, the optical fibers can be adjusted and calibrated by the precision bolts in real time, accordingly, errors can be smaller than a few micrometers, and the mechanical structure can be applied to carrying out melting tapering, engraving and grinding on the optical fibers and manufacturing single-core or multi-core helical optical fibers.

Description

technical field [0001] The invention belongs to the field of special optical fiber micromachining, and in particular relates to a two-dimensional correction mechanism used in conjunction with a CCD imaging system, which is applied to optical fiber axial rotation processing to realize the mechanical structure of optical fiber rotating along the axis. Background technique [0002] Rotation of optical fiber along the axis can produce single-core or multi-core spiral-core optical fiber with a certain pitch, or write spiral grooves, etc., which is of great significance to the production and research of optical fiber sensors. In the field of optical fiber micromachining, people have mastered micromachining technologies such as drilling, grinding, and tapering of optical fibers, but there is still a lot of room for improvement in the precision rotational processing of optical fibers along the axial direction. The invention realizes the concentric rotation of the axis of the optical...

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Problems solved by technology

[0003] The US patent (US3938895) is a method for positioning optical fibers, which can accurately position optical fibers, but it cannot be applied to the rotational processing of optical fibers

Chinese patent (CN202066993) special optical fiber fixture for coupler production, realizes two-dimensional fine-tuning function of optical fiber, but does not have CCD online monitoring and rotation centering function

Chinese patent (CN101879659A), the method and device for rotating optical fiber for micromachining, which suppresses the rotational drift of the optical fiber well, but does not give the problem of how to align the center of the optical fiber with the center of rotation. The concentricity of the rotating mechanism undoubtedly puts forward high requirements for the existing machining accuracy

Since the rotation of the optical fiber along the axial direction requires two-dimensional high-precision displacement optical fiber rotary jigs are characterized by light weight, small size, high precision, easy rotation, and easy feedback, etc., the existing two-dimensional or three-dimensional displacement platforms are bulky and complex to operate. None of them can be applied to the axial concentric rotation system of optical fiber, such as "Design and analysis of a nanoscale two-dimensional micro-positioning worktable" (Optics and Precision Engineering 2006, 14(3):1004-924X), "Two-dimensional high-precision magnetic levitation positioning platform Research on "(Journal of Xi'an Jiaotong University 2008, 42(11))

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