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Mirrors with regular hexagonal segments.

Dario Amodei1, Stephen Padin

  • 1California Institute of Technology, Mail Stop 105-24, 1200 East California Boulevard, Pasadena, California 91125, USA. dario@caltech.edu

Applied Optics
|September 10, 2003
PubMed
Summary

Manufacturing large telescope mirrors from identical hexagonal segments is feasible. This approach minimizes intersegment gaps, enabling the creation of advanced optical systems with numerous small, warped mirror pieces.

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Area of Science:

  • Optics and Astronomy
  • Materials Science

Background:

  • Large astronomical mirrors are crucial for advanced telescopes.
  • Manufacturing challenges exist for large, monolithic mirror designs.
  • Segmented mirrors offer a potential solution to manufacturing limitations.

Purpose of the Study:

  • To calculate the point-spread function and emissivity of a segmented mirror.
  • To assess the feasibility of using regular hexagonal segments of varying sizes for mirror construction.
  • To evaluate the impact of segment count and size variation on mirror performance.

Main Methods:

  • Point-spread function calculations.
  • Emissivity analysis.
  • Modeling of mirrors composed of regular hexagonal segments.

Main Results:

  • Calculations for mirrors using a few sizes of regular hexagonal segments were performed.
  • For mirrors with >= 1000 segments and >= 4 hexagon sizes, the intersegment gap area increase is negligible.
  • This finding is particularly relevant for f/1 mirrors.

Conclusions:

  • A mirror constructed from a large number of identical, warped hexagonal segments is a viable concept.
  • Manufacturing advantages arise from using numerous similar segments.
  • This approach could enable the production of large, high-performance optical mirrors.

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