Author(s)

I. Nitta, A. Kanno, K. Komata & S. Iguchi

Abstract

New joining method for laser scanner lenses by using a shrink fitter I. Nitta*, A. Kanno^, K. Komata^ & S. Iguchf ^Graduate School of Science and Technology, Niigata University, Japan. * Japan Science and Technology Corporation, Japan Abstract A laser scanning unit, which was designed to converge the laser beam to 4.8 over a wide scanning width of 30 mm, consisted of 6 optical lenses. To realize such high performance of the laser scanning unit, the optical lenses in a housing were needed to be placed with their optical axis in a exactly straight line. Usually the optical lenses in the housing are pressed on their rims by ring-shaped retainers for their location. However, the lens location is not accurate by this present method. In addition, the temperature change causes the laser spot deteriorated over the wide scanning width because the thermal expansion coefficients of the lenses are greatly different from that of the metallic housing. We have applied a shrink fitter, which is a new mach

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