Research on manufacturing technology of beryllium and beryllium-aluminum alloy reflector

In order to achieve light weighting and improve the performance of optoelectronic systems, the materials used for mirrors must be lightweight, have high specific stiffness and dimensional stability, and have good thermal properties. Beryllium and beryllium-aluminium alloys have become the preferred materials for mirrors in space and ground optical systems by virtue of their excellent force-thermal properties. This paper examines the manufacturing technology of beryllium and beryllium-aluminum alloy mirrors. Initially, mirror blanks with high dimensional stability are obtained through machining and stabilization. Subsequently, a nickel plating process is employed to coat the mirror blank substrate with a nickel layer. Finally, the mirrors are developed through optical processing. The mirror surface root-mean-square (RMS) reaches (1/60~1/50)λ, and the roughness (Ra) reaches 1nm, which meets the requirements for use in various bands.