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Total: 34 results found.

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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" ...
Wednesday, 05 October 2011
2. Beam shaping
(Products/Solutions)
... deformable mirrors can be used for a lossless  beam conditioning. Most of our standard deformable mirrors can be used directly for this purpose, or we can calculate the optimal mirror actuator geometry ...
Tuesday, 21 June 2011
3. AO for high-power laser
(Products/Solutions)
Our 50 mm  thermally stabilized PDM has been specially designed to be used with high-power lasers.  The deformable mirror features 37 actuators, placed in hexagonal grid with 7 mm pitch and ...
Tuesday, 21 June 2011
We have just introduced a new membrane deformable mirror  integrated with a piezoelectrical tip-tilt stage. The mirror has 15 mm diameter and 17 actuators, with  the geometry optimized for the ...
Friday, 22 April 2011
15-mm MMDM with 17 actuators and integrated tip-tilt stage has been specially designed for correction of low-order aberrrations. The deformable mirror has the actuator geometry optimized for the correction ...
Thursday, 10 February 2011
6. Correction for low-order aberrations with 18-channel PDM
(Technical documents/Technical articles)
18-channel PDM has no actuators inside the active aperture. This makes it suitable for an excellent correction of low-order aberrations. The note presents interferometric images of the results of the generation ...
Thursday, 27 January 2011
7. Defocus generation with MMDM and PDM
(Technical documents/Technical articles)
... factors limiting the amplitude of the correction with various types of mirrors. The actuator stroke (see Fig.1) is the most important factor defining the maximum aplitude of the correctable defocus. ...
Thursday, 27 January 2011
8. Adaptive Optics without trouble
(Technical documents/Technical articles)
... piston actuators. Approximation of smooth shapes, such as tip, tilt, and defocus with step-like function is either unsatisfactory, or requires a very large number of control channels N. Statistics of ...
Monday, 24 January 2011
... variety of electrostatic and piezoelectric actuators. Each of its 3 independent amplifiers with gain of 56 is capable of driving capacitive loads in a wide frequency range. A4MEMS ...
Friday, 19 February 2010
... range and is indispensable tool for operating various types of electrostatic and piezoelectric actuators. In the new version we have significantly improved the frequency response of the amplifier gain, ...
Friday, 19 February 2010
11. 15 mm 37-ch "OKO Mirror"
(Products/MMDM)
...  For more technical information, please download the technical passport of a typical 15-mm 37-actuator MMDM.  ...
Friday, 02 October 2009
There are two types of stroke defined for a deformable mirror — the maximum possible stroke and the maximum inter-actuator stroke. The former one characterises the maximum possible travel of ...
Tuesday, 23 June 2009
The shape of the response functions depends on the mirror type (MMDM or PDM) and on the actuator structure. A very good approximation to the response functions for all of our mirrors can be calculated ...
Tuesday, 27 January 2009
... designed for 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 ...
Friday, 25 July 2008
15. 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 ...
Friday, 04 April 2008
16. 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 ...
Thursday, 27 March 2008
17. 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 ...
Wednesday, 20 February 2008
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 ...
Tuesday, 22 January 2008
... Shack-Hartmann pattern, number of DM actuators and available light level. With Basler A602f camera we achieved correction rates up to 90 Hz at a full frame and up to 380 Hz at an area of interest of ...
Monday, 10 December 2007
... 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 ...
Monday, 10 December 2007
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