Computation of the aberrations of concave diffraction gratings. Part 2. Aberration calculations and estimation of resolving power

The aberrations of a concave grating are derived by computation; the resolving power is estimated from the intersections of the rays with the image plane. It is shown that an aspheric grating can be used to advantage in a monochromator of Zeya-Namioka type.We are indebted to V. A. Efimov for compiling the computer program.