Three Dimensional Speckle Imaging Employing a Frequency-Locked Tunable Diode Laser

Conference · Tue Sep 01 04:00:00 EDT 2015

DOI:https://doi.org/10.1117/12.2188470· OSTI ID:1222099

Cannon, Bret D.; Bernacki, Bruce E.; Schiffern, John T.; Mendoza, Albert

We describe a high accuracy frequency stepping method for a tunable diode laser to improve a three dimensional (3D) imaging approach based upon interferometric speckle imaging. The approach, modeled after Takeda, exploits tuning an illumination laser in frequency as speckle interferograms of the object (specklegrams) are acquired at each frequency in a Michelson interferometer. The resulting 3D hypercube of specklegrams encode spatial information in the x-y plane of each image with laser tuning arrayed along its z-axis. We present laboratory data of before and after results showing enhanced 3D imaging resulting from precise laser frequency control.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1222099
• Report Number(s): PNNL-SA-111821; NN2001000
• Country of Publication: United States
• Language: English

Related Subjects

hree dimensional imaging
laser frequency stabilization
laser speckle imaging
three dimensional speckle imaging