Wu Peng, Liu Sheng, DeHoog Edward, Schwiegerling Jim
College of Optical Sciences, University of Arizona, Tucson, Arizona 85719, USA.
Appl Opt. 2009 Nov 10;48(32):6324-31. doi: 10.1364/AO.48.006324.
In Ref. 1, it was demonstrated that the significant systematic errors of a type of large dynamic range aberrometer are strongly related to the power error (defocus) in the input wavefront. In this paper, a generalized theoretical analysis based on vector aberration theory is presented, and local shift errors of the SH spot pattern as a function of the lenslet position and the local wavefront tilt over the corresponding lenslet are derived. Three special cases, a spherical wavefront, a crossed cylindrical wavefront, and a cylindrical wavefront, are analyzed and the possibly affected Zernike terms in the wavefront reconstruction are investigated. The simulation and experimental results are illustrated to verify the theoretical predictions.
