A high-Strehl low-resolution optical imager (BESSEL)

A measurement of the inner scale of turbulence

Mary Anne Peters, Laird M Close, Tom Stalcup, Matt Rademacher, Grover A. Swartzlander, Erin L. Ford, Rukiah S. Abdul-Malik

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

Abstract

We have constructed a high-speed image stabilization system, BESSEL, that is capable of performing wavefront correction at a rate exceeding 1 kHz. BESSEL achieved on-sky Strehl ratios of 98-99% at 800 nm as we approached the inner scale of atmospheric turbulence when the refractor telescope aperture was stopped down to 25.4 mm (̃r0/2). This is better than expected from Kolmogorov theory, indicating that at D ̃r0/2 we are within the inner scale of turbulence. Utilizing high Strehls and the technique of roll subtraction enabled BESSEL to resolve the binary, ADS 10418AB, with separation of only 0.71 ?/D and a delta magnitude of ̃3 mags at 800 nm. BESSEL's capability to produce high Strehls ratios means that the instrument can be used to test the performance of interference/phase coronagraphs on-sky for the first time. Integrated with an optical vortex coronagraph, BESSEL is capable of nulling the first airy ring of Betelgeuse by more then a factor of ten.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7015
DOIs
StatePublished - 2008
EventAdaptive Optics Systems - Marseille, France
Duration: Jun 23 2008Jun 26 2008

Other

OtherAdaptive Optics Systems
CountryFrance
CityMarseille
Period6/23/086/26/08

Fingerprint

Coronagraph
Atmospheric turbulence
coronagraphs
Wavefronts
Imager
Image sensors
Telescopes
sky
Turbulence
Vortex flow
Stabilization
Kolmogorov theory
turbulence
Image Stabilization
Wavefront Correction
Optical Vortex
Nulling
Atmospheric Turbulence
atmospheric turbulence
Subtraction

Keywords

  • Coronagraphy
  • Instrumentation: adaptive optics
  • Stars: binaries
  • Stars: planetary systems

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Peters, M. A., Close, L. M., Stalcup, T., Rademacher, M., Swartzlander, G. A., Ford, E. L., & Abdul-Malik, R. S. (2008). A high-Strehl low-resolution optical imager (BESSEL): A measurement of the inner scale of turbulence. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7015). [70156G] https://doi.org/10.1117/12.789592

A high-Strehl low-resolution optical imager (BESSEL) : A measurement of the inner scale of turbulence. / Peters, Mary Anne; Close, Laird M; Stalcup, Tom; Rademacher, Matt; Swartzlander, Grover A.; Ford, Erin L.; Abdul-Malik, Rukiah S.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015 2008. 70156G.

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

Peters, MA, Close, LM, Stalcup, T, Rademacher, M, Swartzlander, GA, Ford, EL & Abdul-Malik, RS 2008, A high-Strehl low-resolution optical imager (BESSEL): A measurement of the inner scale of turbulence. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7015, 70156G, Adaptive Optics Systems, Marseille, France, 6/23/08. https://doi.org/10.1117/12.789592
Peters MA, Close LM, Stalcup T, Rademacher M, Swartzlander GA, Ford EL et al. A high-Strehl low-resolution optical imager (BESSEL): A measurement of the inner scale of turbulence. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015. 2008. 70156G https://doi.org/10.1117/12.789592
Peters, Mary Anne ; Close, Laird M ; Stalcup, Tom ; Rademacher, Matt ; Swartzlander, Grover A. ; Ford, Erin L. ; Abdul-Malik, Rukiah S. / A high-Strehl low-resolution optical imager (BESSEL) : A measurement of the inner scale of turbulence. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015 2008.
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