Because of their significant chromatic aberration, holographic optical elements (HOEs) can be used as narrowband optical filters or scanning spectroscopes. Although it is impossible to obtain aberration free imaging over the whole spectrum of light wavelength, by an appropriate choice of HOE recording and imaging geometries, the aberrations can be seriously minimized. As an example, the imaging quality of several different HOEs used in multichannel spectroscopy is analyzed with the aid of numerical evaluation of the respective diffraction integrals. Such computer modeling of imaging gives more adequate results than the geometric ray tracing method.
© 1990 Optical Society of America
Marek Zajac and Jerzy Nowak, "Holographic optical elements used in spectroscopy: some remarks on image quality," Appl. Opt. 29, 5198-5202 (1990)