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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 7 — Apr. 5, 2004
  • pp: 1192–1204

Phase measurement for segmented optics with 1D diffraction patterns

R. Díaz-Uribe and A. Jiménez-Hernández  »View Author Affiliations


Optics Express, Vol. 12, Issue 7, pp. 1192-1204 (2004)
http://dx.doi.org/10.1364/OPEX.12.001192


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Abstract

A simple approach for measuring the piston error between two adjacent segments in a primary mirror of a telescope, based on the one dimension analysis of the diffraction pattern produced by a divided slit, is proposed. Using two wavelengths allows an increase of the dynamic range of the measurement. The main advantages are that even maintaining the correlation based scheme used by other authors, the time of processing should be reduced. Some experimental results are presented which show that for one wavelength a precision of 3 nm and a dynamic range of 316 nm are feasible for the red line of a He-Ne laser. For the two wavelength experiments a precision of 53 nm is obtained for λeq/2=1670 nm dynamic range.

© 2004 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(220.1140) Optical design and fabrication : Alignment
(260.1960) Physical optics : Diffraction theory

ToC Category:
Research Papers

History
Original Manuscript: February 24, 2004
Revised Manuscript: March 15, 2004
Published: April 5, 2004

Citation
R. Diaz-Uribe and A. Jiménez-Hernández, "Phase measurement for segmented optics with 1D diffraction patterns," Opt. Express 12, 1192-1204 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-7-1192


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References

  1. Gary Chanan, Mitchell Troy, Frank Dekens, Scott Michaels, Jerry Nelson, and David Kirkman, �??Phasing the mirror segments of the Keck Telescopes: the broadband phasing algorithm,�?? Appl. Opt. 37, 140-155 (1998). [CrossRef]
  2. Kjetil Doholen, Fredérique Décortiat, François Fresneau, and Patrick Lanzoni, �??A dual-wavelength, random phase-shift interferometer for phasing large segmented primaries,�?? in Advanced Technology Optical/IR Telescopes VI, Larry M. Stepp, Ed., Proceedings of the SPIE 3352, 551-559 (1998).
  3. Gary Chanan, Mitchell Troy, and Edwin Sirko, �??Phase discontinuity sensing: a method for sensing segmented mirrors in the infrared,�?? Appl. Opt. 38, 704-713 (1999). [CrossRef]
  4. Gary Chanan, Jerry Nelson, and Terry S. Mast, �??Segment Alignment for the Keck Telescope Primary Mirror�??, in Advanced Technology Optical telescopes III, L.D. Barr, ed., Proc. SPIE 628, 466-470 (1986). [CrossRef]
  5. A. Jiménez-Hernández, R. Díaz-Uribe, �??Medición de fase para óptica segmentada con patrones de difracción unidimensionales�?? (Phase Measurement for Segmented Optics with One Dimension Diffraction Patterns), presented at the Fourth Ibero American Meeting on Optics, together with the Seventh Latin American Meeting on Optics Lasers and its Applications (IV RIAO �?? VII OPTILAS), Tandil, Argentina, 3-7 Sept. 2001.
  6. Weiyao Zou, �??New phasing algorithm for large segmented telescope mirrors,�?? Opt. Eng. 41, 2338-2344 (2002). [CrossRef]
  7. Achim Schumacher, Nicholas Devaney, and Luzuma Montoya, �??Phasing segmented mirrors: a modification of the Keck narrow-band technique and its application to extremely large telescopes,�?? Appl. Opt. 41, 1297-1307 (2002). [CrossRef] [PubMed]
  8. R. Pastrana-Sánchez, G. Rodríguez-Zurita, J.F. Vázquez-Castillo, �??Phase-conjugate interferometer to estimate refractive index and thickness of transparent plane parallel plates,�?? Rev. Mex. Fís. 47, 142-147 (2001).

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