Misfit of rigid tools and interferometer subapertures on off-axis aspheric mirror segments

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Rigid tools can confer advantages at certain stages of manufacturing off-axis mirror segments, but the misfit due to surface asphericity and asymmetry poses constraints on their application. Types of misfit are classified and, using least squares, the best-fit tool forms with different distances from the pole of the parent asphere are calculated. The outer mirror segment for the European extremely large telescope is taken as a case-study, assuming a rigid tool size of 150 mm. A simple independent approximation validates the calculation. A close parallel is wavefront misfit in subaperture interferometry, which is also considered.

Original languageEnglish
Article number073401
JournalOptical Engineering
Volume50
Issue number7
DOIs
Publication statusPublished - 1 Jul 2011
Externally publishedYes

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Interferometers
Mirrors
interferometers
mirrors
aspheric optics
asphericity
Wavefronts
Interferometry
Telescopes
Poles
interferometry
poles
manufacturing
asymmetry
telescopes
approximation

Cite this

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Misfit of rigid tools and interferometer subapertures on off-axis aspheric mirror segments. / Song, Ci; Walker, David; Yu, Guoyu.

In: Optical Engineering, Vol. 50, No. 7, 073401, 01.07.2011.

Research output: Contribution to journalArticle

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