Abstract
The theory of the holographic grating is applied to the design of aberration-reduced holographic concave gratings for use with Seya–Namioka monochromators. The proper recording parameters are determined for various types of aberration-reduced holographic concave gratings that have the effective grating constant of 1/1200 mm. The performance of the holographic gratings thus designed is evaluated in terms of the degree of spread in spot diagrams. The results show that coma-reduced holographic concave gratings are superior to conventionally ruled concave gratings and holographic concave gratings of Types I, II, and III, proving the usefulness of the design procedure adopted in the present study.
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