Achromatic athermalized retarder fabrication

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A method for fabricating an achromatic, athermalized quarter-wave retarder is presented that involves monitoring retardance during polishing. A design specified by thicknesses alone is unlikely to meet specification due to uncertainties in birefringence. This method facilitates successful fabrication to a retardance specification despite these uncertainties. A retarder made from sapphire, MgF2, and quartz was designed, fabricated, and its performance validated for the 0.470 to 0.865 μm wavelength region. Its specifications are as follows: at wavebands centered at 0.470, 0.660, and 0.865 μm the band-averaged retardance should be 90° ± 10° for all fields and retardance should change less than 0.1° for a 1° change in temperature. Retarder fabrication accommodated birefringence and thickness uncertainties via the following steps. The first plate was polished to a target thickness. The retardance spectrum of the first plate was then measured and used to determine a retardance target for the second plate. The retardance spectrum of the combined first and second plates was then used to specify a retardance target for the third plate. The retardance spectrum of the three plates in combination was then used to determine when the final thickness of the third plate was reached.

Original languageEnglish (US)
Pages (from-to)755-765
Number of pages11
JournalApplied Optics
Volume50
Issue number5
DOIs
StatePublished - Feb 10 2011

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retarders
Birefringence
Specifications
Fabrication
fabrication
specifications
Polishing
Sapphire
Quartz
birefringence
Wavelength
Monitoring
target thickness
Uncertainty
polishing
sapphire
quartz
Temperature
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Achromatic athermalized retarder fabrication. / Mahler, Anna Britt; Mcclain, Stephen C; Chipman, Russell A.

In: Applied Optics, Vol. 50, No. 5, 10.02.2011, p. 755-765.

Research output: Contribution to journalArticle

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