Optical image processing using phase reversal Twyman-Green interferometer

Vuyyuru Venkateswara Rao; Nandigana K. Krishna Mohan

doi:10.1117/12.477579

30 July 2002 Optical image processing using phase reversal Twyman-Green interferometer

Vuyyuru Venkateswara Rao, Nandigana K. Krishna Mohan

Proceedings Volume 4736, Visual Information Processing XI; (2002) https://doi.org/10.1117/12.477579
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

A novel real-time approach to achieve optical image processing to evaluate the difference between the two images is carried out by implementing a phase reversal concept in Twyman-Green interferometer. The phase reversal is accomplished by varying the pressure within an air-filled quartz cell inserted in one of the arms of the interferometer. Initially, the interferometer is aligned to obtain broad interference fringes in the cell region. Then the input imageries are introduced in both the arms of the interferometer and adjusted for exact registration as seen in the plane of observation. By introducing the phase change of (pi) -radians between the two arms of the interferometer, the difference between the two input images is detected in real-time. Phase shift calibration and image subtraction carried out by the proposed method is presented with the experimental results.

Citation Download Citation

Vuyyuru Venkateswara Rao and Nandigana K. Krishna Mohan "Optical image processing using phase reversal Twyman-Green interferometer", Proc. SPIE 4736, Visual Information Processing XI, (30 July 2002); https://doi.org/10.1117/12.477579

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