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
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