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A design and trial production of the image slicer unit for the mid-infrared spectrograph

Sakon, Itsuki; Kataza, Hirokazu; Onaka, Takashi; Fujishiro, Naofumi; Ikeda, Yuji; Tokoro, Hitoshi; Nakagawa, Hiroyuki; Kirino, Okiharu; Mitsui, Kenji; Okada, Norio
2013, SPIE
■ アブストラクト
An image slicer is highly in demand for an integral field unit (IFU) spectrograph of the next generation infrared telescopes. This paper reports the results of the trial production of three key optical elements for a small format (number of slice; n=5) image slicer, i.e. monolithic slice mirrors, monolithic pupil mirrors and monolithic pseudo slit mirrors. We have demonstrated that sufficiently high processing accuracy and mirror surface accuracy for infrared observations are achieved for each optical element based on our super precision cutting techniques.