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PC based CCD camera - automated alignment and autoreflection measurement system that can be run
from a laptop
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how alisa works
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 Alisa-Software Specifications 
Basic software for image acquisition and visual alignment and autoreflection using only the images of the targets
  • High resolution digital camera characteristics: 1280 x 1024 pixels, 5.2 x 5.2 microns / pixel, 30 fps at maximum resolution
  • Real-time continuous acquisition and display software with possibility of online modification of the exposure time to get the best contrast.
  • Real-time sub-frame acquisition and display.
  • Possibility of displaying a selected zone of the image with user-selected magnification in real-time.
  • Possibility of drawing a cross hair defining the center of the reference target image superposed on the image of the current target.
  • Images can be saved in tiff format and reloaded from the file, printed out and imported in any kind of document like Word, Publisher etc. through a simple Cut & Paste operation.
Software for precise alignment using image analysis
  • Any two targets can be used for defining the line-of-sight
  • Definition of line of sight for targets, diameter and distance for each of the targets from the reference target inside the MAT. These data are used during the analysis.
  • Definition of ambient temperature during measurements that will be printed out as annotation in tables and graphs.
  • Details of the operator who is making the measurements, date of measurements and date of analysis that will be printed out as annotation in tables and graphics.
  • A project is created at the beginning of the measurements and all subsequent measurements and output results will be automatically saved in the same project.
  • Images of the different targets are automatically saved in tiff format for future analysis if required.
  • The analysis procedure gives results with a precision of less than 2 microns.
Analysis of the target images gives the following table and graphs output:
  • Tables with (x,y) centers and their estimated errors from analysis, also stored in a file with suffix table.
  • Graphs of (x,y) position of the centers of the targets with respect to the line of sight
  • Graphs of (dx,dy) displacements of the centers of the targets with respect to the line of sight
  • Graphs with indication of movements to be applied for any pair of targets to get aligned. Direction of movement is also specified.
  • Outline of each target for checking quality of the image (e.g. due to air turbulence in the workshop).
Any graph can be imported in any kind of document like Word, Publisher etc. through a simple Cut&Paste operation. Graphs and the output tables can also be printed out on any printer attached to the PC.
Software for precise autoreflection using image analysis
  • Definition of diameter and distance for Image and Reference target. These data are used in the analysis.
  • Definition of ambient temperature during measurements that will be printed out as annotation in tables and graphics
  • Details of the operator who is making the measurements, date of measurements and date of analysis that will be printed out as annotation in tables and graphics.
  • A project is created at the beginning of the measurements. Reference and Image images and output results will be automatically saved in the same project
  • Images of the targets are automatically saved in tiff format for future analysis if required.
  • The analysis procedure gives results with a precision of less than 5 microns.
Analysis of the target images gives the following table and graphs output:
  • Tables with (x,y) centers and their estimated errors from analysis, also stored in a file with suffix .table.
  • Graphs of (x,y) position of the centers of the 2 targets.
  • Graphs of (dx,dy) displacements of the centers of the 2 targets.
  • Graphs with indication of tilt to be applied to the image target to get aligned with respect to the reference target. Direction of tilt is also specified.
  • Outline of Image and Reference targets, for checking quality of the image (e.g. due to air turbulence in the workshop).
Any graph can be imported in any kind of document like Word, Publisher etc. through a simple Cut & Paste operation. Graphs and the output tables can also be printed out on any printer attached to the PC.
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