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

Conference · Tue Sep 01 00:00:00 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 Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1222099
• Report Number(s): PNNL-SA-111821; NN2001000
• Resource Relation: Conference: Applied Advanced Optical Metrology Solutions, August 9, 2015, San Diego, California. Proceedings of the SPIE, 9576:Paper No. 957604
• Country of Publication: United States
• Language: English

Related Subjects

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