MMT adaptive secondary mirror prototype performance

Donald G. Bruns, Todd K. Barrett, David G. Sandler, Guido Brusa, Hubert M. Martin, J. R. Angel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations


The new 6.5 m single mirror multiple mirror telescope (MMT) will be equipped with adaptive optics capabilities to enhance high resolution infrared astronomy. Before we build the 64 cm diameter adaptive secondary, we fabricated a smaller prototype mirror. The adaptive secondary uses voice coil force actuators with an average spacing of 30 mm. Surrounding each actuator is an analog capacitor position sensor operating in a digital closed loop at 10 kHz. This allows the force actuators to be controlled as if they were position actuators. The adaptive secondary configuration and performance test results are presented, followed by the changes to be incorporated into the next curved shell prototype.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages7
ISBN (Print)0819422681
StatePublished - 1997
EventOptical Telescopes of Today and Tomorrow - Landskrona/Hven, Swed
Duration: May 29 1996May 29 1996

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptical Telescopes of Today and Tomorrow
CityLandskrona/Hven, Swed

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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