The Infrared Imaging Spectrograph (IRIS) for TMT: the atmospheric dispersion corrector

Details The Infrared Imaging Spectrograph (IRIS) for TMT: the atmospheric dispersion corrector The Infrared Imaging Spectrograph (IRIS) for TMT: the atmospheric dispersion corrector

2010-07-12

arxiv.org/abs/1007.1977v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

SPIE Astronomical Instrumentation 2010

Scientific paper

We present a conceptual design for the atmospheric dispersion corrector (ADC) for TMT's Infrared Imaging Spectrograph (IRIS). The severe requirements of this ADC are reviewed, as are limitations to observing caused by uncorrectable atmospheric effects. The requirement of residual dispersion less than 1 milliarcsecond can be met with certain glass combinations. The design decisions are discussed and the performance of the design ADC is described. Alternative options and their performance tradeoffs are also presented.

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