OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 33 — Nov. 20, 2011
  • pp: 6283–6293

Fresnel phasing of segmented mirror telescopes

Gary Chanan, Mitchell Troy, Isabelle Surdej, Gary Gutt, and Lewis C. Roberts, Jr.  »View Author Affiliations


Applied Optics, Vol. 50, Issue 33, pp. 6283-6293 (2011)
http://dx.doi.org/10.1364/AO.50.006283


View Full Text Article

Enhanced HTML    Acrobat PDF (506 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Shack-Hartmann (S-H) phasing of segmented telescopes is based upon a physical optics generalization of the geometrical optics Shack-Hartmann test, in which each S-H lenslet straddles an intersegment edge. For the extremely large segmented telescopes currently in the design stages, one is led naturally to very large pupil demagnifications for the S-H phasing cameras. This in turn implies rather small Fresnel numbers F for the lenslets; the nominal design for the Thirty Meter Telescope calls for F = 0.6 . For such small Fresnel numbers, it may be possible to eliminate the lenslets entirely, replacing them with a simple mask containing a sparse array of clear subapertures and thereby also eliminating a number of manufacturing problems and experimental complications associated with lenslets. We present laboratory results that demonstrate the validity of this approach.

© 2011 Optical Society of America

OCIS Codes
(110.6770) Imaging systems : Telescopes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 15, 2011
Manuscript Accepted: September 1, 2011
Published: November 18, 2011

Citation
Gary Chanan, Mitchell Troy, Isabelle Surdej, Gary Gutt, and Lewis C. Roberts, Jr., "Fresnel phasing of segmented mirror telescopes," Appl. Opt. 50, 6283-6293 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-33-6283


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. G. A. Chanan, M. Troy, F. G. Dekens, S. Michaels, J. Nelson, T. Mast, and D. Kirkman, “Phasing the mirror segments of the Keck telescopes: the broadband phasing algorithm,” Appl. Opt. 37, 140–155 (1998). [CrossRef]
  2. G. A. Chanan, C. Ohara, and M. Troy, “Phasing the mirror segments of the Keck telescopes: the narrowband phasing algorithm,” Appl. Opt. 39, 4706–4714 (2000). [CrossRef]
  3. G. A. Chanan, “Design of the Keck Observatory alignment camera,” Proc. SPIE 1036, 59–70 (1988).
  4. J. Nelson and G. H. Sanders, “TMT status report,” Proc. SPIE 6267, 626728 (2006). [CrossRef]
  5. R. Gilmozzi and J. Spyromilio, “The 42 m European ELT: Status,” Proc. SPIE 7012, 701219 (2008). [CrossRef]
  6. F. Y. Gonté, N. Yaitskova, P. Dierickx, R. Karban, A. Courteville, A. Schumacher, N. Devaney, S. Esposito, K. Dohlen, M. Ferrari, and L. Montoya, “APE: a breadboard to evaluate new phasing technologies for a future European giant optical telescope,” Proc. SPIE 5489, 1184–1191 (2004). [CrossRef]
  7. I. Surdej, N. Yaitskova, and F. Gonté, “On-sky performance of the Zernike phase contrast sensor for the phasing of segmented telescopes,” Appl. Opt. 49, 4052–4062 (2010). [CrossRef] [PubMed]
  8. F. Gonté, R. Mazzoleni, I. Surdej, and L. Noethe, “On-sky performance of an optical phasing sensor based on a cylindrical lenslet array for segmented telescopes,” Appl. Opt. 50, 1660–1667 (2011). [CrossRef] [PubMed]
  9. F. Gonté, C. Dupuy, B. Luong, C. Frank, R. Brast, and B. Sedghi, “Active hexagonally segmented mirror to investigate new optical phasing technologies for segmented telescopes,” Appl. Opt. 48, 6392–6399 (2009). [CrossRef] [PubMed]
  10. R. Wilhelm, B. Luong, A. Courteville, S. Estival, F. Gonté, and N. Schuhler, “Dual-wavelength low-coherence instantaneous phase-shifting interferometer to measure the shape of a segmented mirror with subnanometer precision,” Appl. Opt. 47, 5473–5491 (2008). [CrossRef] [PubMed]
  11. J. Kolb, E. Marchetti, S. Tisserand, F. Franza, B. Delabre, F. Gonté, R. Brast, S. Jacob, and F. Reversat, “MAPS, a turbulence simulator for MCAO,” Proc. SPIE 5490, 794–804(2004). [CrossRef]
  12. R. Cohen, T. Mast, and J. Nelson, “Performance of the W. M. Keck telescope active mirror control system,” Proc. SPIE 2199, 105–116 (1994). [CrossRef]
  13. M. Troy and G. Chanan, “Diffraction effects from giant segmented-mirror telescopes,” Appl. Opt. 42, 3745–3753(2003). [CrossRef] [PubMed]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited