A geometric theory is developed for a spherical concave diffraction grating that has variable line spacing and curved grooves and can be produced with existing technology. The aberration coefficients of this grating are determined. A comparison of these coefficients with the corresponding coefficients of holographic gratings and with code v polynomial coefficients gives a clearer understanding of the similarity and difference between mechanically ruled and holographically recorded concave gratings and allows the optimization of these gratings with standard computer programs.
© 2004 Optical Society of America
Elena Sokolova, "Simulation of Mechanically Ruled Concave Diffraction Gratings by Use of an Original Geometric Theory," Appl. Opt. 43, 20-28 (2004)