Blaze Optimization for Triangular Profile Gratings

Abstract

The problem of determining the form of the triangular profile for a diffraction grating which gives high efficiency over the widest possible spectral region is investigated theoretically, for a large range of grating periods. It is shown that rectangular profiles are generally to be preferred to those having higher apex angles (as suggested by Stroke [2]). A theoretical demonstration is given of an experimental result concerning the wavelength shift due to polarization, and a new phenomenon linking efficiency maxima and Wood anomalies is described.