Flexible Optical B.V. (OKO Technologies)

1. Special offer
(News/Latest news)

...  negligible scattering and negligible actuator print-through.  OKO mirrors can be HR coated  for high-power laser applications,  low-dispersion broadband coatings can be used  for ultrafast applications ...

2. Deformable mirror optimized for low-order Zernike terms
(News/Latest news)

... correction of  low-order aberrations. By locating 18  of 19 mirror's actuators outside the 20-mm aperture, we achieved perfect correction of the first 15 Zernike polynomials practically without any actuator ...

3. MrFit
(Products/Software)

... actuators to achieve the best possible compensation for a specified wavefront aberration, defined as a combination of Zernike terms. The program shows the surfaces of the wavefront, the best fit with ...

4. A4MEMS high-voltage amplifier modules
(Products/Electronics)

... frequency range of up to 1 kHz, with full 300 V amplitude. A4MEMS is usable for driving a wide variety of electrostatic and piezoelectric actuators. A4MEMS features a complete short circuit protection ...

5. MrFit is out
(News/Latest news)

... for simulation of membrane and continuous facesheet deformable mirrors ("Mr" means mirror and "Fit" means to fit a specied wavefront). It calculates the voltages to be applied to the actuators to achieve ...

6. New 50mm PDM with 37 channels
(News/Latest news)

OKO Technologies announces new 50mm PDM with 37 actuators. The mirror has 37 PZT actuators forming a hexagonal grid with 6.9 mm pitch. Free actuator stroke is approximately 7 µm, the stroke difference ...

7. How good is the initial figure of OKO deformable mirrors?
(FAQs/General)

... with RMS deviation from the nearest sphere better than 500 nm. The initial surface may have some irregularity due to random hysteresis state of different actuators. These irregularities are always formed ...

8. 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.  ...

9. Linear deformable mirrors
(Products/Wavefront correctors)

... PDM 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 ...

10. 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.))*255.; ...

11. 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 ...

12. 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 ...

13. 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. ...

14. 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 ...

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

... mirrors, these mirrors should have sufficient number of actuators positioned outside the correction aperture. Optics Express 16, 2859-2866 (2008) Author(s): G. Vdovin, O. Soloviev, A. Samokhin, M. Loktev ...

16. 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 ...

17. PDM with 109 actuators
(News/2006)

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

18. 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 ...

19. 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 ...

20. 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). ...