Influence of low temperature on the surface deformation of deformable mirrors

You Juncheng^{1, 2, 3}, Guan Chunlin^{1, 2, †}, Zhou Hong^{1, 2}

(color online) Surface deformation of base of ULE DM in 150 mm diameter at −20 °C produced by (a) actuator 1, ; (b) all actuators, .