Share Email Print
cover

Proceedings Paper

Verification procedure for the wavefront quality of the primary mirrors for the MRO interferometer
Author(s): Eric J. Bakker; Andres Olivares; Reed A. Schmell; Rodney A. Schmell; Darren Gartner; Anthony Jaramillo; Kelly Romero; Andres Rael; Jeff Lewis
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We present the verification procedure for the 1.4 meter primary mirrors of the Magdalena Ridge Observatory Interferometer (MROI). Six mirrors are in mass production at Optical Surface Technologies (OST) in Albuquerque. The six identical parabolic mirrors will have a radius of curvature of 6300 mm and a final surface wavefront quality of 29 nm rms. The mirrors will be tested in a tower using a computer generated hologram, and the Intellium™ H2000 interferometer from Engineering Synthesis Design, Inc. (ESDI). The mirror fabrication activities are currently in the early stage of polishing and have already delivered some promising results with the interferometer. A complex passive whiffle tree has been designed and fabricated by Advanced Mechanical and Optical Systems (AMOS, Belgium) that takes into account the gravity loading for an alt-alt mount. The final testing of the primary mirrors will be completed with the mirror cells that will be used in the telescopes. In addition we report on shear tests performed on the mirror cell pads on the back of the primary mirrors. These pads are glued to the mirror. The shear test has demonstrated that the glue can withstand at least 4.9 kilo Newton. This is within the requirements.

Paper Details

Date Published: 22 August 2009
PDF: 9 pages
Proc. SPIE 7426, Optical Manufacturing and Testing VIII, 74260N (22 August 2009); doi: 10.1117/12.825429
Show Author Affiliations
Eric J. Bakker, New Mexico Tech, Magdalena Ridge Observatory (United States)
Andres Olivares, New Mexico Tech, Magdalena Ridge Observatory (United States)
Reed A. Schmell, Optical Surface Technologies, LLC (United States)
Rodney A. Schmell, Optical Surface Technologies, LLC (United States)
Darren Gartner, Optical Surface Technologies, LLC (United States)
Anthony Jaramillo, W.M. Keck Observatory (United States)
Kelly Romero, Optical Surface Technologies, LLC (United States)
Andres Rael, Optical Surface Technologies, LLC (United States)
Jeff Lewis, Optical Surface Technologies, LLC (United States)


Published in SPIE Proceedings Vol. 7426:
Optical Manufacturing and Testing VIII
James H. Burge; Oliver W. Fähnle; Ray Williamson, Editor(s)

© SPIE. Terms of Use
Back to Top