Abstract

An approximate expression for the aberrations of a spheroidal grating in a near-Rowland-circle mounting is developed using Fermat’s theorem. Its validity is tested by use of an unexpanded, exact, geometric expression of Fermat’s condition. The special cases of a cylindrical and a spherical grating are compared and the cylindrical grating is shown to give superior resolution under some conditions.

© 1974 Optical Society of America

Second-order focusing conditions for ruled concave gratings

M. Pouey
J. Opt. Soc. Am. 64(12) 1616-1622 (1974)

Design of holographic concave gratings for Seya-Namioka monochromators

H. Noda, T. Namioka, and M. Seya
J. Opt. Soc. Am. 64(8) 1043-1048 (1974)

Geometric theory of the grating

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Asymmetric concave gratings: Theory and applications

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J. Opt. Soc. Am. 64(3) 319-324 (1974)

Ray tracing through holographic gratings

H. Noda, T. Namioka, and M. Seya
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