System Schematic
Hardware Description
| BMC’s deformable mirror (DM) technology is used as the central component in the WS-AOD-I to compensate for phase aberrations. The BMC DM is a continuous facesheet deformable mirror that is controlled by hysteresis-free electrostatic actuators located on a square grid. The full DM active aperture can be as little as 1.5 mm to as much as 25 mm across. Each actuator can provide up to 5.5 µm of mechanical stroke, which corresponds to about 11 µm of phase control. The electrostatic actuator array is driven using independent high voltage channels with 14-bit resolution. This corresponds to sub-nanometer displacement precision. The drive electronics can provide frame rates of from about 4.6 kHz up to 100 kHz. |
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The narrow-field image used by the controller is attained using a Thorlabs DCC1545M Monochrome CMOS camera. The DCC Series is an ultra-compact and lightweight CMOS camera with 1280 × 1024 px (SXGA) resolution.The DCC Series is comprised from a large, high-quality CMOS sensor with a small pitch of 5.2 µm (monochrome) and 3.2 µm (color). In full frame mode, the maximum frame rate is 25 frames per second; this can be greatly increased by the variable pixel clock, which allows frame rates up to 250 fps at reduced Regions of Interest (ROIs) and sufficient light conditions. |
| The demonstration system also includes a Hitachi KPM2AN monochrome CCD camera to attain a widefield image of the object of interest. The camera provides full resolution images (570 × 85 pixels) of your area of interest. This camera can easily be replaced with a science camera for use in your current optical setup. |
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Software Description
 The control software for the Wavefront Sensorless Adaptive Optics Demonstrator-Imaging is open source code based in National Instruments’ Labview, Release 8.6 with a Mathworks MATLAB back end, and runs on platforms using Windows operating systems. The software interfaces with the deformable mirror drive electronics and CMOS camera via a USB 2.0 connection. The software allows the user to correct for aberrations introduced as well as generate a random aberration using the DM. The interface consists of Labview graphical user interface which contains a live image of the CMOS camera signal and a plot of the previous system convergence. The closed-loop frame rate measured for the system using the hardware and layout described with a Multi-DM system is XXX Hz.
Customization Opportunity
The Wavefront Sensorless AO Demonstrator-Imaging is a fully- customizable instrument. BMC can tailor the system for researchers and scientists with existing setups and applications. Please contact us to arrange a meeting to discuss how the WS-AOD-I can be customized for you.
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Typical Performance
Left: Image of glass slide with stripe pattern with aberration applied to a Multi-DM. Right: Image of corrected wavefront. This performance is typical of random perturbation and gain inputs to the SPGD controller. |
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WS-AOD-I Standard Components
- BMC deformable mirror*
- Ultra-bright LED Illumination source
- Narrow-field CMOS camera
- Monochrome wide-field CCD camera
- All optical components for system including lenses, mounts, translation stages, irises, etc.
* Standard configurations with Mini-DM, Multi-DM or Kilo-DM are available |
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WS-AOD-I Options
- Demo-in-a-box Includes:
National Instruments Labview©-single license
Full installation with included Dell© PC
- Fundamentals Kit
Includes DM*, CMOS camera and software only
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