Abstract

In order to realize rapid fabrication of a lightweight mirror, an AlSi10Mg alloy mirror was made through 3D printing and replication methods. The mechanical, thermal, and physical properties, the surface accuracy, and the dimensional stability were investigated. Through a selective laser melting method, an Al alloy mirror was printed and exhibited a low areal density of $28.4\mathrm{kg}/{\mathrm{m}}^2$. Through replication, the mirror surface accuracy was improved to $0.033\lambda$ (root mean square, $\lambda =632.8\mathrm{nm}$); surface roughness was 1.3 nm (Ra). The stability test result indicated that the 3D printed mirror presented good dimensional stability in air for a long time and in a temperature changing environment.

© 2018 Optical Society of America

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