Multi-order diffractive optical element for parallel optical classification of corneal pathologies

Abstract

This study is dedicated to the analysis of wavefront aberrations based on a dataset comprising 4,500 sets of Zernike expansion coefficients from healthy individuals and patients with corneal pathologies. We present a diagnostic system concept whose key feature is the utilization of a multi-order diffractive optical element (DOE) as an optical classifier, with inverse-weighted polynomial sets encoded into each order.A six-order DOE was designed, where each diffraction order corresponds to a specific pathology. Numerical simulation demonstrated that when a distorted wavefront is incident on the element, an intensity distribution closely approximating the Airy disk is formed within the diffraction order corresponding to the underlying pathology. Thus, the inverse weights of the Zernike polynomials encoded into the diffraction orders provide effective feature selection for each of the investigated pathologies.

Speaker

Pavel Khorin
Samara National Research University
Russia

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