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28 July 2014 On-instrument wavefront sensor design for the TMT infrared imaging spectrograph (IRIS) update
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The first light instrument on the Thirty Meter Telescope (TMT) project will be the InfraRed Imaging Spectrograph (IRIS). IRIS will be mounted on a bottom port of the facility AO instrument NFIRAOS. IRIS will report guiding information to the NFIRAOS through the On-Instrument Wavefront Sensor (OIWFS) that is part of IRIS. This will be in a self-contained compartment of IRIS and will provide three deployable wavefront sensor probe arms. This entire unit will be rotated to provide field de-rotation. Currently in our preliminary design stage our efforts have included: prototyping of the probe arm to determine the accuracy of this critical component, handling cart design and reviewing different types of glass for the atmospheric dispersion.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jennifer Dunn, Vladimir Reshetov, Jenny Atwood, John Pazder, Bob Wooff, David Loop, Leslie Saddlemyer, Anna M. Moore, and James E. Larkin "On-instrument wavefront sensor design for the TMT infrared imaging spectrograph (IRIS) update", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91479H (28 July 2014);

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