WebThe stressed-lap polishing system is designed for aspheric surfaces, and it works the same way whether the mirror is symmetric or off-axis. For a symmetric mirror, the lap has a symmetric shape when it is over the center of the mirror and distorts into the appropriate off-axis shape as the polishing motion moves it off the axis. For an WebThe stressed-lap polishing technique has been developed to meet the challenge of polishing 8-m-class mirrors with highly aspheric figures to an accuracy consistent with the best ground-based telescope sites. The method is currently being demonstrated in the …
Progress in the stressed-lap polishing of a 1.8-m f/1 …
WebJun 18, 2024 · In this paper, state-of-the-art high-precision material removal manufacturing technologies, especially ultraprecision cutting, grinding, deterministic form correction polishing, and supersmooth polishing, are reviewed and compared with insights into their principles, methodologies, and applications. WebFeb 13, 2024 · Subaperture polishing of silicon aspheric optics using air-inflated membrane tool is reported in the present work. A faster approach for material removal h ... S.C. West, R.S. Young, Progress in the stressed-lap polishing of a 1.8 m f/1 mirror, in Advanced Technology Optical Telescopes IV, ed. L.D. Barr, Proceedings of SPIE, vol 1236 (1990), pp ... indian creek family practice oxford ohio
Manufacture of 8.4 m off-axis segm ents: a 1/5 scale …
WebThe stressed lap is a very stiff large tool with the ability to change its optical shape as it moves over the mirror surface. The lap struggles near the mirror edge and for smoothing at 5-10cm spatial scales. The lap also suffered from erratic drag variations during polishing of the first 8.4m GMT off-axis segment, and required several small ... WebLSST Polishing - YouTube Here you can see the Stressed Lap on the Large Polishing Machine, hard at work on the LSST primary in the Steward Observatory Mirror Lab. Here … WebA stressed lap 600 mm in diameter was designed and built to polish the mirror as an f/1 ellipsoid. It consists of an aluminum disk which changes shape continuously under the influence of 12 moment-generating actuators. indian creek farm