Flexible Optical B.V. (OKO Technologies)

1. Direct control of Zernike modes using piezo and membrane DM
(Technical documents/Technical articles)

... 20 mm. We have applied a special approach to reduce the hysteresis inherent to piezoelectric actuators. It consists in the application of fading alternate voltage to the actuator. We call it "degauss" ...

2. AO for high-power laser
(Products/Solutions)

... has a custom high-reflectivity coating. The mirror shown on photo has been tested with 2kW laser (1064nm, Nd:YAG, CW) for 5 minutes. Driven by our high-voltage amplifier units, the ...

3. Action Discounts
(News/Latest news)

... 20-ch high-voltage amplifier and computer interface (14-bit USB, 16-bit Ethernet, or 8-bit PCI) €7350 or €7850 €4500 MMDM 15 mm 37 ch, Al-coated, including 40-ch high-voltage amplifier and computer ...

4. Defocus generation with MMDM and PDM
(Technical documents/Technical articles)

... The maximum stroke of the pdm actuator is 8 µm, one side, at 400V driving voltage (maximum allowed voltage), and 6µm at 300 V (recommended maximum voltage). MMDM, depending on the aperture ...

5. A4MEMS High-Voltage amplifier modules (new)
(Products/Electronics)

A4MEMS is a low-cost high-voltage DC amplifier.  In the new version we have significantly improved the frequency response of the amplifier gain, extending the operational regime up to 2 kHz for ...

6. New version of A4MEMS high-voltage amplifier is out!
(News/Latest news)

We announce the release of  new, updated version of A4MEMS, our 3-channel high-voltage amplifier for quick MEMS prototyping.  This unit is capable of driving capacitive loads in a wide frequency ...

7. What is the stroke of a deformable mirror?
(FAQs/General)

... a mirror surface when the maximum voltage is applied to all mirror actuators, the latter one describes the deformation when the maximum voltage is applied to a single actuator and zero voltage applied ...

8. What voltage is required by your PCI DAC boards (3.3V or 5V) ?
(FAQs/Electronics)

5 Volts -- it's PCI 2.2 (please see the board manual)

9. MrFit
(Products/Software)

MrFit is a program for simulation of membrane and continuous facesheet deformable mirrors ("Mr" means mirror and "Fit" means to fit a specified wavefront). It calculates the voltages to be applied to the ...

10. High-voltage amplifier boards
(Products/Electronics)

We produce three different types of  20-channel driver boards  for deformable mirrors. These boards have gain of 59, 35, 81, providing output voltage swing [0...400V] for input range [0...10V] in a frequency ...

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

A4MEMS is a low-cost high-voltage DC amplifier. A4MEMS measures 110 x 60 x 30mm. It provides 0 ... 300 V output in 4 independent channels. Voltage ranges up to 0 ... 400 V are available on a special order. ...

12. PCI DAC boards
(Products/Electronics)

OKO digital PCI boards provide 8-bit voltage control for 24 output channels. The output voltage range can be trimmed continuously in the range 2.5 ... 10V for all channels. Setting time per channel is ...

13. USB control unit
(Products/Electronics)

Digital-to-analog converter unit "DAC-40-USB" provides 12-bit voltage control for 40 output channels. The output voltage range can be trimmed continuously in the range 2.5 ... 5 V for all channels. Several ...

14. MrFit is out
(News/2008)

... 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 ...

15. High-voltage amplifier units
(Products/Electronics)

OKO DC HV amplifiers with 20 and 40 channels are specially designed to drive MEMS  devices and  deformable mirrors. Each amplifier has 40 identical amplifier channels with a gain of 55 (80). ...

16. Electronics
(Products/Electronics)

Our standard adaptive optical systems are based on Windows PCs, high-voltage amplifiers and digital-to-analog converters (DAC) serving as interface between a PC and an amplifier. We have developed a number ...

17. How good is MMDM optically?
(FAQs/MMDMs)

... can be easily corrected during the mirror operation by calibrating the bias voltage. ...

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

The displacement of the mirror surface is proportional to the SQUARE of the applied voltage. The mirror response can be linearized using the operation of square root. For 8-bit biased digital control the ...

19. 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 ...

20. 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 ...