The new u' band filter for the One Degree Imager
Asahi was successful in coating the large 445 mm x 428 mm u' band filter for the One Degree Imager in last November.
It was safely delivered and installed in the One Degree Imager at WIYN Observatory in Arizona.
Though u' band filter is the hardest of other broad bandpass especially in large size, it meets all
the requirements
completely by WIYN Consortium.