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| WinCORE Interferometer Control Program |
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The WinCORE application program is the user interface to the Sextant Labs Interferometer System for Microsoft Windows platforms. The following are only some of the new and exciting features supported in this first release.
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  From the Fringe Mode phase maps can be calculated and various data calculated. User may select from cylindrical or 9, 16, 25, or 36 term Zernike polynomial fits. Additional options include the ability to sub sample the phase map before calculations - greatly increasing the measurement speed. Image smoothing, averaging, and masking are also supported.
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  The Intensity Mode samples the laser beam pupil distribution and calculates the best two dimensional Gaussian fit which provides information such as the 1/e^2 points, rim intensities, and "hot spot" error. The hot spot offset shows the distance of the Gaussian fit from the center of the apparent aperture. The error between the Gaussian fit and the real data is used to generate a noise map indicating points that exceed a specified margin. |
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  The WinCORE application uses redundant displays to maximize the ease of aligning a laser source to the Interferometer. The video display shows the focused spot in the Interferometer's spatial filter. The angle sensor display shows the input beam angle as read from a separate 2 axis position sense detector. The duplication of displays insures easy alignment of collimated and un-collimated beams. All alignment data is available over the external control interface facilitating the inclusion of the Interferometer into automatic alignment tooling. |
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  Using the intensity pupil noise information, pixels exceeding a selected margin are masked out allowing accurate phase maps to be calculated even in the presence of considerable contamination such as dirt, hair, and glass imperfections. In the phase map shown here the yellow pixels indicate those rejected for exceeding the noise margin. |
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  Often it is necessary to measure the phase map of a beam that is made up of separate regions. A typical example is measuring a zonal objective lens. The WinCORE application employs an algorithm to allow measurement of such maps. |
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  Combining the phase map information with the pupil intensity distribution allows the calculation of the focused spot metrics such as Strehl Ratio, spot width, and equivalent RMS WFE.
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  The WinCORE application allows saving of measurement data in both binary and textual forms. The fringe image, phase map, and intensity image can be saved to file and later read back and re-analyzed. Textual data can be save in a CVS file with or without column headings, etc. |
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 When enabled the WinCORE program operates a TCP/IP server. The WinCORE TCP/IP server makes almost all of WinCORE's functionality available to external client programs. The client program can be running on the same machine as WinCORE or on another machine entirely. The client program can be written in any language/environment that supports TCP/IP sockets such as Visual Basic, C++ Builder, Delphi, or Visual C++. Communication with the server is by a simple ASCII based protocol making it very easy to implement. It is even possible to 'Telnet' into the server and give commands directly to the program. The exposure of WinCORE's functionality allows it to be completely co-opted into a customer's larger distributed application. An example application would be a scripted measurement system that checks results against specifications and logs results to a QC database. Another example would be integration into a manufacturing station as an advanced input device. |
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Copyright 2003 by Sextant Labs, Inc. All rights reserved. |