ALLVAR alloy athermalization: a novel and cost-effective alternative for small to moderate sized space telescopes

  title={ALLVAR alloy athermalization: a novel and cost-effective alternative for small to moderate sized space telescopes},
  author={James A. Monroe and Matthew J. East and Tony B. Hull},
  booktitle={Optical Engineering + Applications},
Design To Unit Production Cost (DTUPC) is of crucial importance to the viability and implementation of constellations which require tens to hundreds of small to moderate sized spaceborne telescopes (10-cm to 50-cm aperture). Emerging technologies enable cost-effective alternatives to the traditional design and build of such telescopes. This is especially true for the structure of Optical Telescope Assemblies (OTAs) addressing environments where orbital phase modulated thermal gradients and… 



Negative thermal expansion ALLVAR alloys for telescopes

Most materials naturally expand when heated and contract when cooled; this is known as thermal expansion and is typically characterized by a Coefficient of Thermal Expansion (CTE). Competition

Characterization of dimensional stability for materials used in ultra-stable structures

Modern observatories including ultra-stable spectrographs, optical telescopes and gravitational wave observatories rely on ultra-stable structures to meet their science objectives. These structures

Negative thermal expansion ALLVAR Alloys for smaller optics

Temperature changes can detrimentally affect an optic’s performance due to changes in radius of curvature, thickness, and index of refraction. This is a particularly tricky problem when combinations

Mounting optics in optical instruments

This volume gives engineers in the fields of optical engineering and optomechanical design a thorough understanding of the principal ways in which optical components - lenses, windows, filters,

Variable invariables: dimensional instability with time and temperature

How stable are structures made of fused silica, Zerodur, ULE, Invar or Superinvar? We review what is known about dimensional changes with time or temperature for these important materials, including

of this work were funded through NASA SBIR contracts 80NSSC19C0176 and 80NSSC20C0458

    Mounting Optics in Optical Instruments Second Edition, SPIE

    • 2008