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William Herschel Telescope

MARTINI: Multi-Aperture Real Time Image Normalisation Instrument

First light (at ING): MARTINI: September 1988. MARTINI-III: February 1995.

De-commissioned: August 1996.

Designed and built by: Durham University.


MARTINI allows six mirrors to tilt on-line to account for image motion caused by atmospheric seeing. An aperture plate situated in front of the mirrors provides a range of subaperture diameters, from 6x42 to 6x133 cm. Again the motion is monitored by diverting light from a bright star to an IPD, which feeds back updated positions to the mirrors. It used a 578x400 EEV CCD as the detectector, with pixel size 0.12 arcsec, giving a field of view of 70x48 arcsec.

MARTINI-III is an infra-red adaptive optics instrument designed to operate at Nasmyth focus in the Ground-based High Resolution Imaging Laboratory (GHRIL) at the William Herschel Telescope (WHT). The MARTINI-III system employs a polychromatic approach with wavefront distortions being sensed in the visible whilst the science target is recorded in the infra-red with the William Herschel Infra-red Camera (WHIRCAM). MARTINI-III makes use of a six-segmented mirror.

Time allocations:
Nights scheduled since semester 2007B


  • Doel, A. P., Dunlop, C. N., Buscher, D. F., Myers, R. M., & Sharples, R. M. and Major, J. V. (2000). The MARTINI adaptive optics instrument. New Astronomy 5: 223-233.
  • A P Doel et al., 1989, "A MARTINI in the GHRIL Room", Gemini Newsletter, 26, 20.

Research impact:

Publications (2 from ING paper count)

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Last modified: 08 November 2023