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Mercury liquid mirror telescopes work. This ia by now a well-established fact. However they suffer from a major limitation: they cannot be tilted. We have recently proposed that liquid mirrors can be tilted by several tens of degrees, provided one can develop a high-viscosity liquid having a high coefficient of reflectivity. The technology promises inexpensive large telescopes. We present the concept and some of the ongoing work.
Ermanno F. Borra andAnna-Marie R. Ritcey
"Tiltable liquid mirror telescopes", Proc. SPIE 4003, Optical Design, Materials, Fabrication, and Maintenance, (20 July 2000); https://doi.org/10.1117/12.391522
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Ermanno F. Borra, Anna-Marie R. Ritcey, "Tiltable liquid mirror telescopes," Proc. SPIE 4003, Optical Design, Materials, Fabrication, and Maintenance, (20 July 2000); https://doi.org/10.1117/12.391522