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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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 Alisa-Technical Specifications 
The only automated alignment and autoreflection measurement system that can be run from a laptop, with a cable length of up to 70m (200 feet)
The Alisa system is designed for alignment telescopes with built-in autocollimator (like the Taylor-Hobson).
It has a dual function:
  • For alignment: The eyepiece is replaced with a digital camera, and the image of the target is displayed on the PC or laptop monitor. Initial alignment is done using the displayed target image, and the final refined alignment is done using software.
  • For autoreflection: A specially designed illuminator replaces the standard illuminating system. The reflected image of the target on the cover glass is captured by the digital camera and analyzed.
Extensive graphs guide you through the alignment process. The graphs and tables can be printed, and also imported into other programs like Microsoft Word to prepare reports.
Alignment
Standard operating range 1 m to 30 m
Extended operating range with accessory Up to 60 m
Repeatability Better than 2 microns.
Accuracy of determination of centering1 Better than 5 microns.
Autoreflection
Accuracy of determination of centering2 5 microns up to 1 m, less at larger distances.
Accuracy of measurement of tilt 1 arcsecond at a distance of 1 m, less at larger distances
Notes:
  1. The centering accuracy refers to the image of the target. This value is projected onto the target as a function of the distance (this is a property of the alignment telescope): it is 5�m over 3m and increases proportionally with distance: about 50microns over 30m. Using the extended range accessory, it is possible to obtain the accuracy of 50microns at a distance of 60m.
  2. The centering accuracy will depend on the distance to the reflecting target.
The basic kit for alignment consisting of:
  • High-resolution digital camera, which can be run from a laptop or a PC.
  • PCI card for connecting camera to PC.
  • 2m cable (*)
  • Adapter for attaching camera to alignment telescope (for the Taylor-Hobson alignment telescope)(**).
  • Basic software for image acquisition and visual alignment using only the images of the targets (for details see software specifications).
The kit for precise alignment analysis consisting of:
  • All the items in the basic kit.
  • Software for precise alignment using image analysis for Windows 98SE/ME/NT/2000 (for details see software specifications).
The kit for precise autoreflection analysis consisting of:
  • All the items in the basic kit.
  • Specially designed illuminator for autoreflection.
  • Software for precise autoreflection using image analysis for Windows 98SE/ME/NT/2000 (for details see software specifications).
(*) Longer cables up to 70m can be used with repeaters.
(**) The adapter and illuminating system have been designed for the Taylor-Hobson micro-alignment telescope. The camera and software will work with any other equivalent telescope (like Brunson).
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