16 November 1982 Cooled Grating Array Spectrometer For 0.6-5 μm
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A grating spectrometer, designed to illuminate an array of 122 InSb photodiodes with minimum aberrations and maximum speed, has been constructed. The instrument will be used on the 5 meter Hale telescope at Palomar Observatory, and is easily adaptable to telescopes of various focal ratios. A resolving power of 100-1000 can be obtained at wavelengths between 0.6 pm and 5 pm with remotely interchangeable gratings. The spectrometer is sufficiently compact to fit on the 8-inch work surface of a commercially available dewar, and uses simple on-axis spherical and paraboloidal optical elements. The camera mirror produces an f/2.5 beam which, with the 0.2 mm detectors, allows a 3" focal-plane aperture on the 5 meter telescope. All rays fall within a 100 μm blur circle at all points along the array. Distortions have been corrected with a tilted field flattening lens in front of the detector.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. E. Nordholt, J. E. Nordholt, J. H. Lacy, J. H. Lacy, "Cooled Grating Array Spectrometer For 0.6-5 μm", Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933453; https://doi.org/10.1117/12.933453

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