The positioning tolerances for phase plates used to compensate
human eye aberrations are analyzed. Lateral displacements, in-plane
rotations, and axial translations are considered, describing analytic
and numerical procedures to compute the maximum degree of compensation
achievable in each case. The compensation loss is found to be
dependent both on the kind and the amount of misalignment and on the
particular composition of the aberration pattern of each subject in
terms of Zernike polynomials. We applied these procedures to a set
of human eye aberrations measured with the laser ray-tracing
method. The general trend of results suggests that lateral
positioning, followed by angular positioning, are the key factors
affecting compensation performance in practical setups, whereas axial
positioning has far less stringent requirements.
© 2000 Optical Society of America
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