Patent ID: 6781681
Filing Date: 2004-08-24
Classification: A61B,G01B,G01J

Abstract:
A system for determining aberrations in an electromagnetic wavefront, comprising:at least one source of the electromagnetic wavefront directing a beam onto an object system, the object system reflecting or passing at least part of the beam to render a wavefront to be analyzed; at least one reticle positioned in a path of the wavefront to be analyzed; at least one detector positioned to detect the wavefront passing through the reticle, the detector being located at a diffraction pattern self-imaging plane relative to the reticle; and at least one processor receiving an output signal from the light detector and determining at least one aberration in the wavefront based thereon, the aberration representing at least one aberration in the object system, wherein the processor executes logic to undertake method acts comprising: accessing mathematical functions to characterize the electromagnetic wavefront; and determining directional derivatives of the electromagnetic wavefront using the mathematical functions.