Request InfoQuality Vision International (QVI)The QVI TurnCheck from Quality Vision International Inc. is a precision optical instrument for the measuring of shafts and other cylindrical parts. QVI TurnCheck systems address the major sources of uncertainty found in shaft measurement by focusing on advanced optics, thermal stability, and ease of use. The illumination system produces highly collimated light with a constant wavelength, eliminating the wraparound effect on turned parts. The receiving optics are fully telecentric with each element designed to eliminate distortion. 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