29 June 2006 Opto-mechanical design of the KMOS spectrograph module
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We present the optical and mechanical design of the KMOS spectrograph module together with a detailed analysis of its performance. KMOS is a cryogenic near-infrared multi-object spectrograph being developed as a second-generation instrument for the VLT by a consortium of UK and German institutes. Three identical spectrograph modules provide Nyquist sampled spectra in the wavelength range covering the atmospheric bands z, J, H, and K with a resolving power exceeding 3200. The spectrographs are fully achromatic over the bands and the single mirror collimator and six-element camera, together with six high efficiency gratings provide high throughput. The optical performance analysis includes amongst others the spectral resolving power and variation of the PSF as a function of the pupil illumination.
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Matthias Tecza, Matthias Tecza, Ian J. Lewis, Ian J. Lewis, James Lynn, James Lynn, Stephanie Yang, Stephanie Yang, Niranjan A. Thatte, Niranjan A. Thatte, Ian A. J. Tosh, Ian A. J. Tosh, Marc J. Ferlet, Marc J. Ferlet, } "Opto-mechanical design of the KMOS spectrograph module", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62694G (29 June 2006); doi: 10.1117/12.672009; https://doi.org/10.1117/12.672009

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