An optical correlator is a device for comparing two signals by utilising the Fourier transforming properties of a lens. It is commonly used in optics for target tracking and identification.
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Famous quotes containing the word optical:
“The convent, which belongs to the West as it does to the East, to antiquity as it does to the present time, to Buddhism and Muhammadanism as it does to Christianity, is one of the optical devices whereby man gains a glimpse of infinity.”
—Victor Hugo (1802–1885)