Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986rpspr...3...84v&link_type=abstract
In its USSR Report: Space (JPRS-USP-86-001) p 84 (SEE N86-20178 10-88) Transl. into ENGLISH from Astronomicheskiy Zhurnal (Mo
Astronomy and Astrophysics
Astronomy
Lenses, Liquids, Telescopes, Astronomy, Cost Reduction, Design Analysis, Stability
Scientific paper
The development of a liquid telescope with a mirror placed in a rotating system of intermediate damping fluids is discussed. Experimental data indicating the advantages of use of this method in astronomy are given. The examination of this problem indicates that the use of liquid mirrors is far more promising than is usually assumed and the designing and construction of large zenith telescopes with a liquid objective is feasible. As a highly reflecting liquid it is possible to use mercury with a protective layer of glycerin or a gallium melt. In addition to having a high-quality surface, a liquid mirror is incomparably cheaper and more easily produced than a traditional mirror, is not subject to thermal and static deformations and has a controllable surface configuration. A system of such telescopes at different latitudes can be irreplaceable for problems of the scanning-search type. The use of a liquid mirror in a vertical solar telescope would not even require changes in its basic optical system. The simplicity of this method makes its use possible in the construction of ultralarge objectives for future generations of telescopes operating in both optical and microwave ranges. There is no need for mechanical processing of the mirror surface and efforts necessary for producing adequate materials and means for their hardening during the rotation process are justified.
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