05777742 is referenced by 50 patents and cites 3 patents.

A system and method for three-dimensional imaging utilize a lens to perform a two-dimensional Fourier transform of an interference pattern while focusing the pattern on a two-dimensional detector array which is positioned in the image plane of the lens. This allows immediate previewing of the imaged object for proper positioning. Coherent energy beams are utilized to create a series of interference patterns, or image-plane holograms, each at a different frequency of the source energy beams. Furthermore, at each frequency, the relative phase between an object and a reference energy beam is varied to capture the complex values associated with the interference patterns. After capturing and storing the various interference patterns, a computer performs a one-dimensional Fourier transform, or other simplified processing to generate the three-dimensional image of the object. The image resolution extends to the micron range making this system and method easily adaptable to a variety of three-dimensional inspection applications.

Title
System and method for holographic imaging with discernible image of an object
Application Number
29627
Publication Number
5777742
Application Date
February 4, 1994
Publication Date
July 7, 1998
Inventor
Joseph C Marron
Brighton
MI, US
Agent
Brooks & Kushman P C
Assignee
Environmental Research Institute of Michigan
MI, US
IPC
G01B 9/02
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