Sakon, Itsuki; Kataza, Hirokazu; Onaka, Takashi;
Fujishiro, Naofumi; Ikeda, Yuji
; Tokoro, Hitoshi;
Nakagawa, Hiroyuki; Kirino, Okiharu; Mitsui, Kenji; Okada, Norio
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.