We propose and demonstrate parallel subtraction of the Fourier power spectrum of two images with the use of real-time holographic interferometry. The subtraction, which exhibits shift invariance, is achieved by employing a Mach–Zehnder interferometer and a photorefractive crystal. The results are presented and discussed.
© 1992 Optical Society of America
Original Manuscript: September 30, 1991
Published: January 1, 1992
Pochi Yeh, Claire Gu, and Dapeng Zhang, "Parallel subtraction of Fourier power spectrum using holographic interferometry," Opt. Lett. 17, 70-72 (1992)