Abstract
To reduce the uncorrected higher-order aberrations for holographic gratings requiring an extreme dispersion, we have modified the Rowland mounting by moving the recording laser sources away from the grating. Then, with a multimode deformable plane mirror to record the grating, the correction of all the aberrations up to the fourth order inclusive is found sufficient to obtain a high-quality image. Applied to the FUSE-LYMAN grating, with a groove density of as much as 5740 grooves/mm, for which a resolution of 30,000 was required, this new recording device produces a resolution from 139,000 to 222,000 over the spectral range.
© 2000 Optical Society of America
Full Article | PDF ArticleMore Like This
Michel Duban
Appl. Opt. 40(10) 1599-1608 (2001)
Michel Duban
Appl. Opt. 37(31) 7209-7213 (1998)
Michel Duban
Appl. Opt. 38(16) 3443-3449 (1999)