Patent ID: 6535638
Filing Date: 2003-03-18
Classification: G03H,G06K,G07F

Abstract:
A scanner for extracting detailed structural information from a holographic image, comprising:a laser source constructed to generate a laser beam; focusing optics that direct the laser beam from the laser source to form an illuminated spot on the holographic image; an image sensor that detects a pattern of light diffracted from the illuminated spot on the holographic image; spectrally dispersive optics to form a spectrum line from light received by illuminating a first portion of a substrate over which the holographic image is placed; a time gated line array sensor that detects the spectrum line formed from the spectrally dispersive optics; and an electronic system that performs image processing functions that include comparing the pattern of light detected by the image sensor to a reference pattern and that compares the spectrum line detected by the time gated line array sensor to a representation of the location of the spectrum line.