Patent ID: 6411406
Filing Date: 2002-06-25
Classification: G01N,G02B,G03H

Abstract:
A method of numerically reconstructing a holographic image comprising the steps of:measuring and recording the intensity distribution of a sample; performing a coordinate transformation of the intensity distribution to produce a transformed intensity distribution which removes a non-linearity in a phase factor of a Kirchhoff-Helmholtz formula applied to the intensity distribution producing a phase factor linearized Kirchhoff-Helmholtz formula; interpolating on an equidistant point grid the transformed intensity distribution to produce an interpolated intensity distribution; taking a Fast-Fourier-Transform of a summation form of the phase factor linearized Kirchhoff-Helmholtz formula to produce a transformed Kirchhoff-Helmholtz formula; calculating an image using the transformed Kirchhoff-Helmholtz formula on the interpolated intensity distribution.