We developed an IFU for the optical spectrograph FOCAS on the Subaru telescope. It saw the first light in March 2019, and has been open for common use since then.

Optical layout of FOCAS IFU

Links

FOCAS IFU details
Instrument paper: Ozaki et al. 2020, PASJ, 72, 97
WEB news： FOCAS Starts Integral Field Spectroscopy (July 3, 2019)