Characterisation of a novel super-polished bimorph mirror

A novel super-polished adaptive bimorph mirror has been developed, which provides variable focal distance and local figure control in the sub-nm range. The optic has the potential to generate distortion-free beams and enable dynamical focusing and wavefront control. We present results of this optic, including ex-situ characterisation of the surface topography using the Diamond-NOM, and in-situ investigation using synchrotron light at Diamond's B16 Test beamline. The wavefront properties of the mirror have also been studied using at-wavelength metrology methods based on X-ray speckle tracking.