Bimorph Mirrors | FMB Oxford

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Bimorph Mirrors

Bimorph Mirrors

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Mirror Systems

Bimorph mirrors are assembled by gluing together two pairs of bi-layers consisting of an active element (zirconate lead titanate PZT ceramic) and a neutral fused silica plate, which is then polished. A specific feature of a bimorph is that the bending mechanism is intrinsic to the mirror.

Advantages of Bimorphs are:

  • Up to 32 electrodes available, this allows correction of high spatial frequency errors (a mechanical bender can only correct for the length if one actuator or half the length if
  • fitted with two actuators)
  • Can correct optical defects from the whole beamline
  • Adaptive zonal control
  • Compact and lightweight
  • No mechanical moving parts

Bimorph mirrors are used on monochromatic beamlines as they are currently limited to low heat loads.


LengthUp to 1700mm
WidthUp to 45mm
Slope error2μrad RMS (no voltage applied)
1μrad RMS (after connection)
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