Optical tomography scanner requires no moving parts

Dec. 20, 1999
Researchers at the University of Texas, Austin, have developed a method of optical coherence tomography (OCT) for two- and three-dimensional subsurface scanning that requires no moving parts.

Researchers at the University of Texas, Austin, have developed a method of optical coherence tomography (OCT) for two- and three-dimensional subsurface scanning that requires no moving parts. Prospective applications include medical imaging and semiconductor inspection.

The OCT technologycurrently under development as an optical alternative for medical imaging and nondestructive-testing applications performed by CT, magnetic resonance (MR), and ultrasound imagingalso relies on a tomographic process. This effect is achieved in most OCT schemes by varying the optical path length of the reference arm in a Michelson interferometer structure and observing interference fringes when that path length falls within one coherence length of a reflective location within the material under study. The sample arm of the interferometer illuminates the material under study using a broadband light source. The detection mechanism is based on cross correlating the reference- and sample-arm signals.

About the Author

Hassaun A. Jones-Bey | Senior Editor and Freelance Writer

Hassaun A. Jones-Bey was a senior editor and then freelance writer for Laser Focus World.

Sponsored Recommendations

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

Motion Scan and Data Collection Methods for Electro-Optic System Testing

April 10, 2024
Learn how different scanning patterns and approaches can be used in measuring an electro-optic sensor performance, by reading our whitepaper here!

How Precision Motion Systems are Shaping the Future of Semiconductor Manufacturing

March 28, 2024
This article highlights the pivotal role precision motion systems play in supporting the latest semiconductor manufacturing trends.

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!