F-0309 Analysis of the Creep Properties of Plastic Materials for the Shrink Fitter

Abstract

An ultra-precision method of joining optical lenses in a cell has been developed by using a shrink fitter, which is made of plastics. This method gives contact pressure to the shrink fitter inserted between the optical lenses and the cell in various environmental temperature. Therefore, the contact pressure of the shrink fitted assembly decreased with time because of stress relaxation of the shrink fitter. Consequently, the assembly loosened and the radii of curvature of the lenses changed. We examined the effect of creep properties of the shrink fitter on its mounting performance for optical lenses theoretically and experimentally.