Focusing diffractive optical elements encoded in liquid-crystal spatial light modulators yields an inherent equivalent apodization of the focused spot as a result of the pixelated nature of these devices and the finite extent of each pixel. We present a theoretical explanation for and experimental evidence of this effect. We demonstrate an experimental procedure for measuring the apodization and a method to compensate for this effect.
© 2000 Optical Society of America
(110.2990) Imaging systems : Image formation theory
(110.4100) Imaging systems : Modulation transfer function
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(230.3720) Optical devices : Liquid-crystal devices
(260.1960) Physical optics : Diffraction theory
María J. Yzuel, Juan Campos, Andrés Márquez, Juan C. Escalera, Jeffrey A. Davis, Claudio Iemmi, and Silvia Ledesma, "Inherent Apodization of Lenses Encoded on Liquid-Crystal Spatial Light Modulators," Appl. Opt. 39, 6034-6039 (2000)