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In this chapter, we present the mathematical basics of optical filtering. In addition, we recognize colored plane objects of simple shape using holographic filters. The domain of coherent optics is due to Fresnel (beginning of the nineteenth century). The appearance of gas lasers in 1961 made important progress in the field of coherent optics. This field is based on the scalar theory of diffraction. Two important variants of laser are spatial coherence and temporal coherence relative to the classical sources.

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Pattern Recognition and Processing of Information

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  • 发表日期：

    2025年

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  • Abdallah Hamed

摘要

In this chapter, we present the mathematical basics of optical filtering. In addition, we recognize colored plane objects of simple shape using holographic filters. The domain of coherent optics is due to Fresnel (beginning of the nineteenth century). The appearance of gas lasers in 1961 made important progress in the field of coherent optics. This field is based on the scalar theory of diffraction. Two important variants of laser are spatial coherence and temporal coherence relative to the classical sources.