Abstract

The central-ray aberrations of the two-mirror plane-grating spectrograph are studied in three dimensions. Two mounts are discussed. Astigmatism is found to be reduced in both mounts by a reduction of the ruled length of the grating and/or by reduction of the mirror-tilt angles. When the rulings are orthogonal to the meridional plane, the coma-free condition from the two-dimensional theory is found not to eliminate horizontal coma completely; the residual coma is reduced by the same arrangements that will reduce astigmatism and by placing the mirrors close to each other. For the case in which the rulings are parallel with the meridional plane, an expression for complete elimination of horizontal coma in the central image is given. In both mounts, the conditions for elimination of coma should be satisfied by variation of the curvatures of the mirrors while the tilt angles should be kept as small as possible. Criteria for elimination of astigmatism and spherical aberration are also given.

© 1972 Optical Society of America

Full Article  |  PDF Article
Related Articles
High Altitude Observatory’s New Coronagraph and Spectrograph

Joseph H. Rush and George K. Schnable
Appl. Opt. 3(12) 1347-1352 (1964)

Coma compensation in a parabolized Ebert monochromator

M. A. Gil and J. M. Simon
Appl. Opt. 18(13) 2280-2285 (1979)

Space-resolving flat-field extreme ultraviolet spectrograph system and its aberration analysis with wave-front aberration

Il Woo Choi, Jong Ung Lee, and Chang Hee Nam
Appl. Opt. 36(7) 1457-1466 (1997)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (52)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription