Flexible Optical B.V. (OKO Technologies)

21. How large can be the amplitude of the corrected aberrations?
(FAQs/General)

... range is higher for low spatial frequencies. The maximum profile difference between the adjacent actuators reaches 800 nm for MMDM and can be as large as 3 ?m for a PDM.  ...

22. Linear deformable mirrors
(Products/Wavefront correctors)

... for pulse compression The linear piezoelectric deformable mirror for femtosecond pulse shaping has 10x50mm active area, controlled by two rows of 10 actuators each. The actuator pitch is 5 mm. The maximum ...

23. How linear is the MMDM response?
(FAQs/MMDMs)

... following expression can be used to convert the control signal CS (in the range -1...1) into the control byte CB applied directly to the digital board controlling the mirror actuator: CB=(int)sqrt(0.5*(CS+1))*255.; ...

24. How MMDM works?
(FAQs/MMDMs)

... silicon frame and suspended over a number of planar electrodes - electrostatic actuators. When the membrane is electrically grounded and a voltage is applied to one or a number of the actuators, the membrane ...

25. How to bias the MMDM?
(FAQs/MMDMs)

In the simplest case biasing can be achieved by applying a constant voltage to all actuators of the MMDM. Theoretically under the constant bias the MMDM should take a parabolic shape. In practice, MMDM ...

26. What is "biased operation"?
(FAQs/MMDMs)

... shapes with a reference to a flat surface. To achieve bi-directional operation the membrane should be initially deflected towards the actuators and made perfectly spherical by adjusting the actuator voltages. ...

27. Piezoelectric DM
(Products/Wavefront correctors)

OKO Technologies produces low-cost piezoelectric deformable mirrors (PDM) with clear aperture of 30 mm and 50 mm. The full surface stroke is 6 μm standard with maximum stroke between the adjacent actuators ...

28. Publications based on OKO products
(Products/Technology)

... changes between 1.5 and 2.5 D, at a temporal frequency of 0.2 Hz. The aberrations were measured at 20 Hz using a Shack-Hartmann sensor and corrected using a 37-actuator deformable mirror. The accommodation ...

29. New PDM with 79 channels
(News/2007)

OKO Technologies announces new 50mm PDM with 79 actuators. The mirror has 79 PZT actuators, with 61 actuators forming a hexagonal grid with 4.7 mm pitch, and 18 actuators placed on a circumference ...

30. PDM with 109 actuators
(News/2006)

OKO Tech introduces 50-mm 109-ch  piezoelectric deformable mirror.

31. PDM for high-power lasers
(News/2006)

OKO Technologies introduces 50mm 37ch athermal piezoelectric deformable mirror for high-power laser applications. The mirror features 8000 nm full stroke, 2200 nm inter-actuator stroke. The mirror is specially ...

32. Linear PDM for femtosecond pulse shaping
(News/2006)

OKO introduces  20-ch linear piezoelectric deformable mirror for femtosecond pulse shaping.  The mirror has 10x50mm active area, controlled by two rows of 10 actuators each. Actuator pitch ...

33. 37-channel PDM
(News/2005)

... DM, but has a higher actuator count. For extended technical data click here (PDF, download and then open from disk). ...

34. Piezoelectric DM with 19 actuators
(News/2004)

OKO introduces low-cost 19-channel piezoelectric deformable mirror. Please check out live interferometric images of the device.