skip to main content

SciTech ConnectSciTech Connect

Title: Three Dimensional Imaging with Multiple Wavelength Speckle Interferometry

We present the design, modeling, construction, and results of a three-dimensional imager based upon multiple-wavelength speckle interferometry. A surface under test is illuminated with tunable laser light in a Michelson interferometer configuration while a speckled image is acquired at each laser frequency step. The resulting hypercube is Fourier transformed in the frequency dimension and the beat frequencies that result map the relative offsets of surface features. Synthetic wavelengths resulting from the laser tuning can probe features ranging from 18 microns to hundreds of millimeters. Three dimensional images will be presented along with modeling results.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1140100
Report Number(s):
PNNL-SA-101267
NN2001000
DOE Contract Number:
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Proceedings of the SPIE: Dimensional Optical Metrology and Inspection for Practical Applications III, May 5, 2014, Baltimore, Maryland, 9110:91100A
Publisher:
KG Harding and T Yoshizawa; SPIE, Bellingham, WA, United States(US).
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
speckle interferometry; synthetic wavelength