Time-delayed source and interferometric measurement of domes and windows

William P. Kuhn, Matthew B Dubin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Measurement of the transmitted wavefront of domes and windows is a long-standing problem. One may use a large return sphere and measure the interference cavity without the dome present and again with the dome present. The difference between the two measurements is a double-pass measurement of the transmitted wavefront of the dome. Even so, the long coherence length of the source results in many extraneous fringe patterns. Windows may be tested by using a collimated source and return flat. A time-delayed source (TDS) having a short-coherence length is used to obtain a single interference pattern due only to interference of light reflected by the two surfaces of a dome or window. Standard phase shifting algorithms may be used with the TDS to measure the optical thickness of a dome or window without errors due to multiple reflections. Since most of the interferometer is common-path, environmental sensitivity is reduced and alignment is straightforward compared to typical interferometers. Finally, since there is no reference surface, stitching of sub-aperture measurements is simplified.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6545
DOIs
StatePublished - 2007
EventWindow and Dome Technologies and Materials X - Orlando, FL, United States
Duration: Apr 11 2007Apr 12 2007

Other

OtherWindow and Dome Technologies and Materials X
CountryUnited States
CityOrlando, FL
Period4/11/074/12/07

Fingerprint

Domes
domes
Wavefronts
interference
Interferometers
interferometers
optical thickness
diffraction patterns
apertures
alignment
cavities
sensitivity

Keywords

  • Common path
  • Dome
  • Multiple reflections
  • Phase-shift
  • Short coherence
  • Stitching
  • Time-delay
  • Window

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kuhn, W. P., & Dubin, M. B. (2007). Time-delayed source and interferometric measurement of domes and windows. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6545). [65450O] https://doi.org/10.1117/12.718810

Time-delayed source and interferometric measurement of domes and windows. / Kuhn, William P.; Dubin, Matthew B.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6545 2007. 65450O.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kuhn, WP & Dubin, MB 2007, Time-delayed source and interferometric measurement of domes and windows. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6545, 65450O, Window and Dome Technologies and Materials X, Orlando, FL, United States, 4/11/07. https://doi.org/10.1117/12.718810
Kuhn WP, Dubin MB. Time-delayed source and interferometric measurement of domes and windows. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6545. 2007. 65450O https://doi.org/10.1117/12.718810
Kuhn, William P. ; Dubin, Matthew B. / Time-delayed source and interferometric measurement of domes and windows. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6545 2007.
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