1 December 1991 Finite element analysis of large lenses for the Keck telescope high-resolution echelle spectrograph
Author Affiliations +
The finite element analyses of two large lenses for the Keck Telescope High Resolution Echelle Spectrograph are described. The two lenses, one simple lens, and one meniscus, are of fused silica and are approximately 800 mm (30 in.) in diameter. The purpose of the analyses is to determine the deformations of each optic under its own weight, and to identify the simplest, most cost effective mounting cell that will satisfy the optical requirements. Two common radial supports are analyzed, including varieties of hard point and band type mountings. Several types of axial supports are examined including simple three-point mounts, ring mounts, and static deformation mounts. A parametric finite element input routine is described, whereby a solid model and finite element mesh are automatically generated, given the lens diameter, central thickness, and surface radii of curvature. Deformation predictions from the models are compared with theoretical calculations, interferometric testing, and precision profilometry.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bruce C. Bigelow "Finite element analysis of large lenses for the Keck telescope high-resolution echelle spectrograph", Proc. SPIE 1532, Analysis of Optical Structures, (1 December 1991); doi: 10.1117/12.48251; https://doi.org/10.1117/12.48251


Photometric calibration of NPOI visibilities
Proceedings of SPIE (July 23 2014)
Modeling of structural cables
Proceedings of SPIE (July 09 2018)
Optimum Shapes For Lightweighted Mirrors
Proceedings of SPIE (November 03 1982)
ZEUS: Zeeman Echelle University of Crete spectrograph
Proceedings of SPIE (August 15 2000)
Design and analysis of a rotationally resistant floor for a...
Proceedings of SPIE (September 16 2007)
Slip and wear in multilayer azimuth track systems
Proceedings of SPIE (September 28 2004)

Back to Top