Measurement of in-plane motions and rotations using a simple electronic speckle pattern interferometer

✍ Scribed by K.M. Abedin; M. Wahadoszamen; A.F.M.Y. Haider

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 672 KB
• Volume: 34
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(02)00016-6

✦ Synopsis

We describe the construction and operation of a simple electronic speckle pattern interferometer which is sensitive to in-plane motions and rotations. The interferometer is extremely simple and easy to use. It uses a commercial digital still camera for image acquisition, and a personal computer for image storage and analysis. The interferometer was used to measure very small in-plane rotations of a rough surface, and the results were found to be in good agreement with the expected values. We propose to use this system as an instrument for the measurement of small-angle rotations.