抄録
A small optical mirror glued by ultraviolet (UV) curable adhesive on a metal plate is moved due to a shrinkage of adhesive film under the inclined illumination of UV-LED light. Off-axis digital holography has been applied for detecting the movement of the small mirror on the adhesive film in its hardening process. When the UV-light illuminates the adhesive film with the inclined angle, the hardening process of the adhesive around the mirror varied due to the intensity variation. To further investigate the shrinkage of the UV-adhesive, off-axis holography was applied to detect the movement of the aluminum plate floated on the adhesive film in the hardening process. By measuring the displacement of the aluminum plate, it was shown that the adhesive film first contracted, and then expanded due to thermal expansion caused by the exothermic photo-polymerization reaction. By comparing both experimental results, it was found that the behavior of the hardening adhesive explained the behavior of the mirror fixed by the UV-curable adhesive.
https://ror.org/01jaaym28 