Null corrector design for white light scatterplate interferometry on a large conic surface

Rex M. Kremer, Brian DeBoo, Jose M Sasian

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel null corrector design for use with a white light scatterplate interferometer on a large conic surface is presented. In this design, an aspheric diamond-turned mirror (DTM), hereafter called the null-correcting mirror (NCM), exactly cancels out the spherical aberration of the mirror under test. Low-power refractive elements correct field aberrations over the finite aperture of the scatterplate. The null corrector maintains a phase difference between the test and reference beams of less than 1/2 wave over the finite field size of the scatterplate for optimal fringe visibility. The null corrector can be certified using another smaller DTM and/or a computer-generated hologram. The design has the significant advantages of being small in size, less expensive than designs using spherical surfaces (due to the small size of the NCM), and useable with other interferometers. We include discussions on the calculation of the surface profile for the NCM and certifying mirror, field correction, and achromatization.

Original languageEnglish (US)
Pages (from-to)2869-2875
Number of pages7
JournalOptical Engineering
Volume41
Issue number11
DOIs
StatePublished - Nov 2002

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Interferometry
interferometry
Mirrors
mirrors
Aberrations
Interferometers
aberration
Diamonds
interferometers
diamonds
Holograms
visibility
Visibility
apertures
profiles

Keywords

  • Null corrector
  • Optical testing
  • Scatterplate interferometry
  • Segmented mirror
  • White light interferometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Null corrector design for white light scatterplate interferometry on a large conic surface. / Kremer, Rex M.; DeBoo, Brian; Sasian, Jose M.

In: Optical Engineering, Vol. 41, No. 11, 11.2002, p. 2869-2875.

Research output: Contribution to journalArticle

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