Flexible Optical B.V. (OKO Technologies)

21. What is the power handling ability of OKO DM?
(FAQs/General)

Standard 15mm Al-coated MMDM can handle up to 3 W optical load in the visible range. On a special order, MMDM can be coated with a special HR metal-dielectric coatings, making them suitable for optical ...

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

The surface quality is good enough to work with very low scattering in the whole visible spectrum. The initial figure of MMDM is flat with RMS deviation from the nearest reference plane better than 250nm. ...

23. How large is MMDM?
(FAQs/MMDMs)

Standard OKO mirrors are circular with a diameter of 10mm and 15mm. We can custom develop devices of up to one inch in diameter and with various geometries of reflective membrane - we have experience with ...

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

... This formula provides linear correspondence between the control signal CS and the mirror displacement and sets the mirror into theoretical biased position when CS=0. MMDM features negligible hysteresis. ...

25. How MMDM works?
(FAQs/MMDMs)

MMDM consists of a thin (500 to 700nm thick) membrane made of silicon nitride. The membrane is coated by a thin layer of aluminum or gold to produce a highly reflective surface. The membrane is fixed to ...

26. 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 ...

27. Is it possible to use MMDM for tilt correction (scanner mode)?
(FAQs/MMDMs)

The device can be specially calibrated to correct for tilts, preserving the diffraction-limited quality of the reflected beam in the range of about 25*lambda/D where lambda is the wavelength and D is the ...

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

The MMDM membrane can be deflected only in the direction of the electrode structure because the electrostatic force can be only attractive. This means the deflected membrane can produce only concave optical ...

29. What is MMDM?
(FAQs/MMDMs)

MMDM is "Micromachined membrane deformable mirror". ...

30. What is the use of MMDM?
(FAQs/MMDMs)

MMDM is used for fast correction of aberrations in optical systems. ...

31. WF correctors
(Products/Wavefront correctors)

...  The systems we offer use Piezoelectric Deformable Mirrors (PDM) and Micromachined Membrane Deformable Mirrors (MMDM). FrontSurfer wavefront control system is used as a wavefront sensor and AO feedback ...

32. AO systems with MMDM
(Products/Complete AO systems)

AO systems with MMDM are based on our technology of Micromacined Membrane Deformable Mirrors. These mirrors are inexpensive and fast. They feature zero hysteresis and can work in a frequency range of up ...

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

High-resolution retinal imaging with micro adaptive optics systemThe authors describe a retinal imaging system based on 37-channel MMDM and Shack-Hartmann wavefront sensor from OKO Technologies. Applied ...

34. AO system overview
(Products/Complete AO systems)

... systems. Click here for published work based on our mirrors. We supply closed-loop AO systems based on Micromachined Membrane Deformable Mirrors (MMDM) with up to 79 channels and Piezoelectric Deformable ...

35. MMDMs
(Category)

36. MMDM
(Category)

Micromachined membrane deformable mirrors (MMDM) with apertures in the range of 10 to 50 mm represent a high-quality affordable solution for the correction of dynamic wavefront deformations in laser systems ...