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OKO Tech Introduces 109 Channel Low-Cost Piezoelectric Deformable Mirror

Delft, The Netherlands – October 5, 2006:   Flexible Optical B.V. (a.k.a. OKO Technologies) announces the introduction of a novel low-cost piezoelectric deformable mirror with 109 actuators.
  The mirror has a 53 mm clear aperture with package dimensions of 100×100×60 mm. The mirror weighs approximately 650 g. It is driven by three 40-channel HV amplifier units, controlled from a computer USB port via three 40-channel 12-bit USB DAC modules. The mirror is supplied with an SDK for Windows. Complete closed-loop adaptive optical systems including the 109-channel deformable mirror and OKO's FrontSurfer wavefront sensor are also available.

The mirror figure is controlled by 109 piezoelectric actuators positioned in an orthogonal grid with a pitch of 4.3 mm. The free actuator stroke is approximately 7 µm, the stroke difference between neighbouring actuators reaches 1.5 µm. Higher inter-actuator stroke is available on special order. The initial mirror figure is slightly spherical with an ROC larger than 30 m. RMS deviation from the initial reference sphere does not exceed 0.5 µm. Actuator hysteresis is better than 10%.
Atlas of Laser Scanning Ophthalmoscopy, Scheuerle
The mirror can be actively flattened with respect to the initial sphere with a RMS error of better than λ/20.

The 109-channel 50 mm piezoelectric OKO mirror is suitable for fast correction of large high-order aberrations in vision and ophthalmic systems, laser systems and medium-size telescopes. The mirror can be coated with metal, metal-dielectric and multilayer dielectric coatings for high reflectivity. The mirror surface is robust and can be cleaned using a standard “pull-off” procedure.

OKO 109 Channel Mirror
Full Press Release

© 2006
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