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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 16 — Aug. 2, 2010
  • pp: 17433–17447

Separation of the effects of astigmatic figure error from misalignments using Nodal Aberration Theory (NAT)

Tobias Schmid, Jannick P. Rolland, Andrew Rakich, and Kevin P. Thompson  »View Author Affiliations


Optics Express, Vol. 18, Issue 16, pp. 17433-17447 (2010)
http://dx.doi.org/10.1364/OE.18.017433


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Abstract

We present the nodal aberration field response of Ritchey-Chrétien telescopes to a combination of optical component misalignments and astigmatic figure error on the primary mirror. It is shown that both astigmatic figure error and secondary mirror misalignments lead to binodal astigmatism, but that each type has unique, characteristic locations for the astigmatic nodes. Specifically, the characteristic node locations in the presence of astigmatic figure error (at the pupil) in an otherwise aligned telescope exhibit symmetry with respect to the field center, i.e. the midpoint between the astigmatic nodes remains at the field center. For the case of secondary mirror misalignments, one of the astigmatic nodes remains nearly at the field center (in a coma compensated state) as presented in Optics Express 18, 5282-5288 (2010), while the second astigmatic node moves away from the field center. This distinction leads directly to alignment methods that preserve the dynamic range of the active wavefront compensation component.

© 2010 OSA

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(080.1010) Geometric optics : Aberrations (global)

History
Original Manuscript: May 21, 2010
Revised Manuscript: July 3, 2010
Manuscript Accepted: July 13, 2010
Published: July 30, 2010

Citation
Tobias Schmid, Jannick P. Rolland, Andrew Rakich, and Kevin P. Thompson, "Separation of the effects of astigmatic figure error from misalignments using Nodal Aberration Theory (NAT)," Opt. Express 18, 17433-17447 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-16-17433


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References

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