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Is it possible to use MMDM for tilt correction (scanner mode)? |
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MMDMs
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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 mirror diameter. Contact OKO for details. Using the device in scanner mode will reduce its correction performance for higher order aberrations. |
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Where to buy high-voltage power supplies for OKO driver boards? |
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General
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Any regulated (DC 0...300V, 100mA) laboratory power supply will work. Good regulated 300V power supplies are produced by Delta Elektronika, postbus 27, 4300 AA Zierikzee, The Netherlands, tel. (0)111-413656, fax (0)11-416919. EMCO high-voltage DC to DC convertors F03 (F02 for lower voltage) can be used for portable applications. One module is needed for a 19-ch system, two modules will power a 37-ch system. In general, you will need one module per 20 channels. |
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What is included in a complete adaptive optical system from OKO Tecnologies? |
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Adaptive optical systems
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On demand, OKO Technologies can supply a complete closed-loop adaptive optical system (AOS), which includes all necessary optical and mechanical components in addition to the FrontSurfer adaptive optics package. It has a numerical aperture of 1:10 and can be applied for real-time correction of optical aberrations and generation of precision wavefronts. |
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MMDMs
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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 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 is deformed locally changing its shape. Combinations of voltages applied to different electrodes form different shapes. |
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How do the response functions of the deformable mirrors look like? |
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General
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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 with the free version of MrFit. |
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