title: High-efficiency echelle gratings for MIGHTI, the spatial heterodyne interferometers for the ICON mission.
abstract: Development of a new generation of low-groove density-blazed echelle gratings optimized for MIGHTI, a space-borne spatial heterodyne interferometer operating in the visible and near infrared is described. Special demands are placed on the wavefront accuracy, groove profile, and efficiency of these gratings. These demands required a new ruling for this application, with significant improvements over existing gratings. Properties of a new generation of highly efficient, plane gratings with 64  grooves/mm blazed at 8.2° are reported.
authors.forename: Christoph R
authors.initials: CR
authors.lastname: Englert
authors.forename: Charles M
authors.initials: CM
authors.lastname: Brown
authors.forename: Bernhard
authors.initials: B
authors.lastname: Bach
authors.forename: Erich
authors.initials: E
authors.lastname: Bach
authors.forename: Kirk
authors.initials: K
authors.lastname: Bach
authors.forename: John M
authors.initials: JM
authors.lastname: Harlander
authors.forename: John F
authors.initials: JF
authors.lastname: Seely
authors.forename: Kenneth D
authors.initials: KD
authors.lastname: Marr
authors.forename: Ian
authors.initials: I
authors.lastname: Miller