Using the DP-190 glue for adhesive attachment of a large space mirror and its rim

Oleg Vlasenko; Alexey Zverev; Mikhail Sachkov

doi:10.1117/12.2055729

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18 July 2014 Using the DP-190 glue for adhesive attachment of a large space mirror and its rim

Oleg Vlasenko, Alexey Zverev, Mikhail Sachkov

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Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 91513I (2014) https://doi.org/10.1117/12.2055729
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The glue DP-190 is widely used for adhesive attachment of astrositall (zerodur) lightweight large-size space astronomical mirrors (diameter of 1.7 m and more) with elements of their frames of invar. Peculiarities of physicalmechanical behavior of the glue DP-190 when exposed to the environment during the ground operation and in orbit cause instability of the reflective surface quality of mirrors. In this report we show that even a small (around 1%-5%) volumetric deformation of a cylindrical adhesive layer with a thickness of 0.8 mm between the mirror and the rim element causes significant mirrors deformation. We propose to use adhesive layer of special form that allows to reduce volumetric deformations of the glue DP-190 up to three times. Here we present results based on primary mirror tests of the WSO-UV project.

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Oleg Vlasenko, Alexey Zverev, and Mikhail Sachkov "Using the DP-190 glue for adhesive attachment of a large space mirror and its rim", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91513I (18 July 2014); https://doi.org/10.1117/12.2055729

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