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D. Anderson, J. Burge, D. Ketelsen, B. Martin, S. WestSteward Observatory Mirror LaboratoryUniversity of ArizonaTucson, Arizona 8572].G. Poczulp, J. Richardson, W. WongNational Optical Astronomy ObservatoriesP.O. Box 26732, Tucson, Arizona 85726—67321. Abstract.The continuing development of rapid fabrication methods for large optics atthe Steward Observatory Mirror Lab has resulted in the completion of the WIYN 3.5m primary mirror in only five months. The use of these methods, though rapid,also resulted in one of the best surface figures we have produced (16 rim rms),excellent microroughness (8 angstroms rms), and very smooth small—scale figureerror as determined by the structure function of the surface errors. In thispaper, we review the important techniques in the grinding, polishing, and testingof the mirror used to achieve these results.2. Introduction. |
