Abstract

Two approaches to reducing optical aberrations of concave grating spectrographs have been used, holographically controlling the groove curvature and spacing and reshaping the optical substrate while ruling the grooves conventionally. The latter approach, slightly deforming an ellipsoidal grating blank, can lead to diffraction-limited performance at a single far ultraviolet wavelength. When such a grating is used in a slitted Rowland circle spectrograph, the result is an extremely efficient spectrograph with spectral resolving power of ~30,000 and low astigmatism. Optical fabrication technology has advanced to the point where these exotic surface gratings are becoming practical.

© 1991 Optical Society of America

Aberration-corrected aspheric gratings for far-ultraviolet spectrographs: holographic approach

Pam Davila, David Content, and Catherine Trout
Appl. Opt. 31(7) 949-954 (1992)

Aberration-corrected aspheric grating designs for the Lyman/Far-Ultraviolet Spectroscopic Explorer high-resolution spectrograph: a comparison

Catherine Trout, David Content, and Pam Davila
Appl. Opt. 31(7) 943-948 (1992)

Holographic diffraction gratings generated by aberrated wave fronts: application to a high-resolution far-ultraviolet spectrograph

Robert Grange and Michel Laget
Appl. Opt. 30(25) 3598-3603 (1991)

Comparison of grating designs for the Lyman Far-Ultraviolet Spectroscopic Explorer spectrograph

Michel Duban
Appl. Opt. 32(22) 4253-4264 (1993)

Deformed ellipsoidal gratings for far-ultraviolet spectrographs: analytic optimization

David Content and Takeshi Namioka
Appl. Opt. 32(25) 4881-4889 (1993)