Complex On-Axis Holograms and Reconstruction without Conjugate Images
Holograms representing both real and imaginary parts have been obtained with an on-axis reference from an experimental acoustical underwater viewing system and digitally reconstructed to yield only the real image. The absence of both the conjugate imagery and dc and autoconvolution terms allows maximum efficiency in utilizing the relatively limited amount of sampling often available for microwave and acoustic radiation and reduces conjugate image noise. Improved imagery of underwater targets which has been obtained in this way with relatively light sampling (20 × 20) is presented.
KeywordsMicrowave Convolution Sine Tempo
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