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Proceedings Article

Tolerancing and alignment of a three-mirror off-axis telescope

[+] Author Affiliations
Anna-Britt Mahler, Russell Chipman

College of Optical Sciences, The Univ. of Arizona

Proc. SPIE 6676, Optical System Alignment and Tolerancing, 66760I (September 21, 2007); doi:10.1117/12.734958
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From Conference Volume 6676

  • Optical System Alignment and Tolerancing
  • José M. Sasian; Mitchell C. Ruda
  • San Diego, CA | August 26, 2007

abstract

When the optical elements of a system are not collinear, there are advantages to aligning all elements simultaneously. This paper presents the steps taken to prepare for system alignment and the alignment plan for such a system. A tolerance analysis of the system defines the compensators necessary for system alignment and allows an estimate of the expected magnitude of initial aberrations present in the system. Polarization and pupil aberrations are characterized in order to further understand expected system aberrations before alignment. A two step alignment plan is outlined. First, a CCD array placed at the focal plane indicates spot size and shape as elements are aligned. Once spot size is minimized, the CCD array is replaced by a ball bearing for retroreflection. Useful interferograms can be obtained with which remaining aberrations can be minimized. This technique is presented as the alignment plan for an off-axis telescope system consisting of one spherical and two ellipsoidal mirrors.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Anna-Britt Mahler and Russell Chipman
"Tolerancing and alignment of a three-mirror off-axis telescope", Proc. SPIE 6676, Optical System Alignment and Tolerancing, 66760I (September 21, 2007); doi:10.1117/12.734958; http://dx.doi.org/10.1117/12.734958


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