1 October 1973 An Alignment Technique for Compound Reflecting Telescopes
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The utilization of optical alignment instrumentation in the assembly of certain large telescopes provides a convenient means for installing and calibrating these massive systems in the observatory. An experiment was performed during the factory acceptance test of a 1.22 m (48 in.) aperture Cassegrain to determine the accuracy which might be realized in practice. Scatterplate-interferometry and Hartmann tests were used with a 1.24 m (49 in.) optical flat to quantify laboratory performance. The results were impressive. The telescope alignment not only met the one-quarter wavelength peak-to-peak specification but also demonstrated that this type of calibration procedure can be performed on site, requiring a minimum of time, equipment and operator experience.
J. B. Houston, Jr., J. B. Houston, Jr., Bruce H. Walker, Bruce H. Walker, David W. Dodgen, David W. Dodgen, } "An Alignment Technique for Compound Reflecting Telescopes," Optical Engineering 12(5), 125161 (1 October 1973). https://doi.org/10.1117/12.7971653 . Submission:
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