Frequency-plane filtering with an achromatic optical transform.
A holographic matched filter has been recorded in the frequency plane of an achromatic optical transform configuration. Sandwich-type zone plates and an achromatic doublet are used to form the transform system, which is in cascade with the hologram filter and an achromatic-fringe interferometer. Correlation experiments are reported in which a large space-bandwidth and broad spectral range are obtained.
Morris
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GM
George
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