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27 January 1989 Setting And Testing Of A Right Angle System With Zone Plate Pattern Analysis
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By using a low power laser beam to pass through a beam splitter to illuminate the system which functions as a right angle reflector, the incident beam is reflected several times in the interval between the beam splitter and the system. The reflections will result in multiple beams to emerge from the system to the screen. The two principal ones of these beams will interfere each other to generate a zone plate pattern. When the centers of the beams are not coincided, unsymmetrical fringe pattern will be observed. By adjusting the system to get symmetrical pattern, perpendicularity of setting of the system will be gotten. In testing, deviation of perpendicularity of the angle to be tested can be estimated from the symmetry of the interference pattern. It is very easy to get five arc seconds accuracy both in setting and testing.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Po-Hsin Chen, Ding-Tin Lin, and Ming-Wen Chang "Setting And Testing Of A Right Angle System With Zone Plate Pattern Analysis", Proc. SPIE 0965, Current Developments in Optical Engineering III, (27 January 1989);


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Proceedings of SPIE (October 25 1979)

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