Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

D. G. Bruns; T. K. Barrett; T. J. Brinkley; D. Goyena; D. G. Sandler; H. M. Martin; G. Brusa; J. R.P. Angel

doi:10.1117/12.290145

Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

D. G. Bruns, T. K. Barrett, T. J. Brinkley, D. Goyena, D. G. Sandler, H. M. Martin, G. Brusa, J. R.P. Angel

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

The upgraded 6.5 m MMT in AZ will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sensor control bandwidth. A 60 actuator prototype, nearly identical to the final adaptive secondary size, has been built and is currently being tested.

Original language	English (US)
Pages (from-to)	164-172
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	3126
DOIs	https://doi.org/10.1117/12.290145
State	Published - 1997
Externally published	Yes
Event	Adaptive Optics and Applications - San Diego, CA, United States Duration: Jul 30 1997 → Aug 1 1997

Keywords

Actuators
Adaptive optics
Adaptive secondary
Capacitor sensors
Control systems
MMT

ASJC Scopus subject areas

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

Access to Document

10.1117/12.290145

Cite this

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title = "Final prototype design for the adaptive secondary mirror of the 6.5-m MMT",

abstract = "The upgraded 6.5 m MMT in AZ will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sensor control bandwidth. A 60 actuator prototype, nearly identical to the final adaptive secondary size, has been built and is currently being tested.",

keywords = "Actuators, Adaptive optics, Adaptive secondary, Capacitor sensors, Control systems, MMT",

author = "Bruns, {D. G.} and Barrett, {T. K.} and Brinkley, {T. J.} and D. Goyena and Sandler, {D. G.} and Martin, {H. M.} and G. Brusa and Angel, {J. R.P.}",

year = "1997",

doi = "10.1117/12.290145",

language = "English (US)",

volume = "3126",

pages = "164--172",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

note = "Adaptive Optics and Applications ; Conference date: 30-07-1997 Through 01-08-1997",

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T1 - Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

AU - Bruns, D. G.

AU - Barrett, T. K.

AU - Brinkley, T. J.

AU - Goyena, D.

AU - Sandler, D. G.

AU - Martin, H. M.

AU - Brusa, G.

AU - Angel, J. R.P.

PY - 1997

Y1 - 1997

N2 - The upgraded 6.5 m MMT in AZ will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sensor control bandwidth. A 60 actuator prototype, nearly identical to the final adaptive secondary size, has been built and is currently being tested.

AB - The upgraded 6.5 m MMT in AZ will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sensor control bandwidth. A 60 actuator prototype, nearly identical to the final adaptive secondary size, has been built and is currently being tested.

KW - Actuators

KW - Adaptive optics

KW - Adaptive secondary

KW - Capacitor sensors

KW - Control systems

KW - MMT

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VL - 3126

SP - 164

EP - 172

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Adaptive Optics and Applications

Y2 - 30 July 1997 through 1 August 1997

ER -

Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

Abstract

Keywords

ASJC Scopus subject areas

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