Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror

F. Wildi, G. Brusa, A. Riccardi, M. Lloyd-Hart, H. M. Martin, Laird M Close

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

23 Citations (Scopus)

Abstract

In this communication, we present the progress of the 6.5 m MMT adaptive optics system. During the last part of 2001 and the 1st part of 2002, the system has been validated in the laboratory statically and dynamically with sample frequencies of up to 550 Hz. In June 2002, an attempt has been made to make this system work on the telescope but has been hampered by mechanical failures. However, ease of installation of the system and open-loop operation of the mirror was demonstrated at this occasion and offers reasons to be optimistic on the future of the system. The MMT-AO system is the first AO system to compensate the aberrated wavefront at the telescope's secondary mirror. This approach has unique advantages in terms of optical simplicity, high throughput and low emissivity. Its realization presents many technical challenges, which have now been overcome. Today, the deformable mirror is characterized and accepted. It features a 1.8 mm thick 640 mm diameter convex aspheric mirror (manufactured at the Steward Observatory Mirror Lab), mounted on a 50 mm thick ULE reference body with 336 actuators, as well as a cluster of 168 DSP's and associated analog circuitry for position sensing and actuator driving. The system has been characterized in the laboratory at sampling speeds up to 550 Hz and had been integrated on the telescope.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsP.L. Wizinowich, D. Bonaccini
Pages155-163
Number of pages9
Volume4839
Edition1
DOIs
StatePublished - 2002
EventAdaptive Optical System Technologies II - Waikoloa, HI, United States
Duration: Aug 22 2002Aug 26 2002

Other

OtherAdaptive Optical System Technologies II
CountryUnited States
CityWaikoloa, HI
Period8/22/028/26/02

Fingerprint

Adaptive optics
adaptive optics
Mirrors
mirrors
Telescopes
telescopes
actuators
position sensing
Actuators
deformable mirrors
emissivity
installing
Observatories
Wavefronts
observatories
communication
sampling
analogs
Throughput
Sampling

Keywords

  • Adaptive optics
  • Adaptive secondary
  • Thermal infrared

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Wildi, F., Brusa, G., Riccardi, A., Lloyd-Hart, M., Martin, H. M., & Close, L. M. (2002). Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror. In P. L. Wizinowich, & D. Bonaccini (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (1 ed., Vol. 4839, pp. 155-163) https://doi.org/10.1117/12.459758

Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror. / Wildi, F.; Brusa, G.; Riccardi, A.; Lloyd-Hart, M.; Martin, H. M.; Close, Laird M.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / P.L. Wizinowich; D. Bonaccini. Vol. 4839 1. ed. 2002. p. 155-163.

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

Wildi, F, Brusa, G, Riccardi, A, Lloyd-Hart, M, Martin, HM & Close, LM 2002, Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror. in PL Wizinowich & D Bonaccini (eds), Proceedings of SPIE - The International Society for Optical Engineering. 1 edn, vol. 4839, pp. 155-163, Adaptive Optical System Technologies II, Waikoloa, HI, United States, 8/22/02. https://doi.org/10.1117/12.459758
Wildi F, Brusa G, Riccardi A, Lloyd-Hart M, Martin HM, Close LM. Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror. In Wizinowich PL, Bonaccini D, editors, Proceedings of SPIE - The International Society for Optical Engineering. 1 ed. Vol. 4839. 2002. p. 155-163 https://doi.org/10.1117/12.459758
Wildi, F. ; Brusa, G. ; Riccardi, A. ; Lloyd-Hart, M. ; Martin, H. M. ; Close, Laird M. / Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror. Proceedings of SPIE - The International Society for Optical Engineering. editor / P.L. Wizinowich ; D. Bonaccini. Vol. 4839 1. ed. 2002. pp. 155-163
@inproceedings{a18253ac9026472085f0b8088b85a2da,
title = "Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror",
abstract = "In this communication, we present the progress of the 6.5 m MMT adaptive optics system. During the last part of 2001 and the 1st part of 2002, the system has been validated in the laboratory statically and dynamically with sample frequencies of up to 550 Hz. In June 2002, an attempt has been made to make this system work on the telescope but has been hampered by mechanical failures. However, ease of installation of the system and open-loop operation of the mirror was demonstrated at this occasion and offers reasons to be optimistic on the future of the system. The MMT-AO system is the first AO system to compensate the aberrated wavefront at the telescope's secondary mirror. This approach has unique advantages in terms of optical simplicity, high throughput and low emissivity. Its realization presents many technical challenges, which have now been overcome. Today, the deformable mirror is characterized and accepted. It features a 1.8 mm thick 640 mm diameter convex aspheric mirror (manufactured at the Steward Observatory Mirror Lab), mounted on a 50 mm thick ULE reference body with 336 actuators, as well as a cluster of 168 DSP's and associated analog circuitry for position sensing and actuator driving. The system has been characterized in the laboratory at sampling speeds up to 550 Hz and had been integrated on the telescope.",
keywords = "Adaptive optics, Adaptive secondary, Thermal infrared",
author = "F. Wildi and G. Brusa and A. Riccardi and M. Lloyd-Hart and Martin, {H. M.} and Close, {Laird M}",
year = "2002",
doi = "10.1117/12.459758",
language = "English (US)",
volume = "4839",
pages = "155--163",
editor = "P.L. Wizinowich and D. Bonaccini",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
edition = "1",

}

TY - GEN

T1 - Towards 1st light of the 6.5 m MMT adaptive optics system with deformable secondary mirror

AU - Wildi, F.

AU - Brusa, G.

AU - Riccardi, A.

AU - Lloyd-Hart, M.

AU - Martin, H. M.

AU - Close, Laird M

PY - 2002

Y1 - 2002

N2 - In this communication, we present the progress of the 6.5 m MMT adaptive optics system. During the last part of 2001 and the 1st part of 2002, the system has been validated in the laboratory statically and dynamically with sample frequencies of up to 550 Hz. In June 2002, an attempt has been made to make this system work on the telescope but has been hampered by mechanical failures. However, ease of installation of the system and open-loop operation of the mirror was demonstrated at this occasion and offers reasons to be optimistic on the future of the system. The MMT-AO system is the first AO system to compensate the aberrated wavefront at the telescope's secondary mirror. This approach has unique advantages in terms of optical simplicity, high throughput and low emissivity. Its realization presents many technical challenges, which have now been overcome. Today, the deformable mirror is characterized and accepted. It features a 1.8 mm thick 640 mm diameter convex aspheric mirror (manufactured at the Steward Observatory Mirror Lab), mounted on a 50 mm thick ULE reference body with 336 actuators, as well as a cluster of 168 DSP's and associated analog circuitry for position sensing and actuator driving. The system has been characterized in the laboratory at sampling speeds up to 550 Hz and had been integrated on the telescope.

AB - In this communication, we present the progress of the 6.5 m MMT adaptive optics system. During the last part of 2001 and the 1st part of 2002, the system has been validated in the laboratory statically and dynamically with sample frequencies of up to 550 Hz. In June 2002, an attempt has been made to make this system work on the telescope but has been hampered by mechanical failures. However, ease of installation of the system and open-loop operation of the mirror was demonstrated at this occasion and offers reasons to be optimistic on the future of the system. The MMT-AO system is the first AO system to compensate the aberrated wavefront at the telescope's secondary mirror. This approach has unique advantages in terms of optical simplicity, high throughput and low emissivity. Its realization presents many technical challenges, which have now been overcome. Today, the deformable mirror is characterized and accepted. It features a 1.8 mm thick 640 mm diameter convex aspheric mirror (manufactured at the Steward Observatory Mirror Lab), mounted on a 50 mm thick ULE reference body with 336 actuators, as well as a cluster of 168 DSP's and associated analog circuitry for position sensing and actuator driving. The system has been characterized in the laboratory at sampling speeds up to 550 Hz and had been integrated on the telescope.

KW - Adaptive optics

KW - Adaptive secondary

KW - Thermal infrared

UR - http://www.scopus.com/inward/record.url?scp=0038060721&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038060721&partnerID=8YFLogxK

U2 - 10.1117/12.459758

DO - 10.1117/12.459758

M3 - Conference contribution

VL - 4839

SP - 155

EP - 163

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

A2 - Wizinowich, P.L.

A2 - Bonaccini, D.

ER -