Design of aberration-balanced high-efficiency focusing holographic gratings

A volume and phase focusing holographic grating to be used as the principal element of a high-resolution spectrometer has been designed with the aid of a computer. A two-step method was used; first designs were obtained with an aberration-balancing technique, and, in the second step, these early designs are optimized by a ray tracing procedure to obtain aberration-balanced high-efficiency holograms that can be used in highresolution spectroscopy.