title: Mechanically ruled aberration-corrected concave gratings for a flat-field grazing-incidence spectrograph.
authors.affiliation: Hitachi, Ltd., Central Research Laboratory, Kokubunji, Tokyo 185, Japan
authors.forename: T
authors.initials: T
authors.lastname: Kita
authors.forename: T
authors.initials: T
authors.lastname: Harada
authors.forename: N
authors.initials: N
authors.lastname: Nakano
authors.forename: H
authors.initials: H
authors.lastname: Kuroda