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2 August 2000 Issues in scaling the ELT up to 100 m
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The Hobby-Eberly Telescope (HET) has been examined as a prototype for an Extremely Large Telescope (ELT) with a 33- meter diameter primary mirror. In this paper we examine the feasibility of scaling the HET/ELT up to 100-meters in diameter. In this 100-meter telescope design (called ELTX) the advantages of the tilted Arecibo concept seem to emerge even more strongly. For example the whole primary mirror is below grade and extremely well shielded from wind shake and the Stewart platform which carries the spherical aberration corrector and the instruments is capable of being scaled up to this massive size without any serious problems. Such a design is on track for probable science missions in the next half century.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank B. Ray, Frank N. Bash, Lawrence W. Ramsey, and Thomas A. Sebring "Issues in scaling the ELT up to 100 m", Proc. SPIE 4004, Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning, (2 August 2000);


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