Liquid Mirrors: A Review
| dc.creator | Borra, Ermanno F. | |
| dc.date | 1994-10-03 | |
| dc.date.accessioned | 2026-07-07T02:19:27Z | |
| dc.date.available | 2026-07-07T02:19:27Z | |
| dc.description | The surface of a spinning liquid takes the shape of a paraboloid that can be used as a reflecting mirror. This very old and nearly forgotten concept has recently been revived and I review its present status. Extensive interferometric tests of liquid mirrors (the largest one having a diameter of 2.5-meters ) show excellent optical qualities. I discuss the factors that can limit the optical quality of liquid mirrors, how to minimize them as well as the basic technology. A handful of liquid mirrors have now been built that are used for scientific work. I show representative data obtained from 2.65-m diameter liquid mirror telescopes used for astronomy and the atmospheric sciences (lidar). Section 5, of particular interest to cosmologists, or astronomers using surveys, examines the expected performance of 4-m liquid mirror telescopes dedicated to cosmological surveys. It is rather impressive, due to the fact that the instruments work full- time on four-year surveys: Spectrophotometry reaches B=24 for all objects within over 100 square degrees and wide-band photometry reaches about B=28. I consider the future of liquid mirror telescopes: limits to their sizes, engineering issues as well as speculations on lunar or space LMTs. I briefly mention the possibility of non-rotating GRIN liquid mirrors. Finally I address the issues of the field accessible to LMTs equipped with novel optical correctors. Optical design work, and some exploratory laboratory work, indicate that a single LMT should be able to access, with excellent images, small regions anywhere inside fields | |
| dc.description | to appear In Canadian Journal of Physics. 51 pages + 11 figures 5 are of which included and 6 will be sent upon request, uuencoded-compressed-Postscript, EFB90 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9410008 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9410008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/9868 | |
| dc.subject | Astrophysics | |
| dc.title | Liquid Mirrors: A Review | |
| dc.type | text |