Optical Processing Of Coherent Doppler Tomograms

J. S. Hu; G . Flesher; H. Ansari; G. Wade

doi:10.1117/12.935003

23 December 1983 Optical Processing Of Coherent Doppler Tomograms

J. S. Hu, G . Flesher, H. Ansari, G. Wade

Proceedings Volume 0388, Advances in Optical Information Processing I; (1983) https://doi.org/10.1117/12.935003
Event: 1983 Los Angeles Technical Symposium, 1983, Los Angeles, United States

Abstract

In recent years, we and others have developed a type of reflective tomography based on coherent processing of Doppler frequency-shifted echoes from rotating objects. The objects are placed in the Fraunhofer region and irradiated with microwaves as they rotate. The returning signals are sampled and stored in digital form. These are later processed using an optical computer, and highly-resolved, two-dimensional images (tomograms) can be reconstructed. Holographic character is apparent in the processed data. To produce an image, we first make a data film strip and then irradiate it with light from a He-Ne laser in our coherent optical processor. The available resolution predicts images comparable to those produced with digital computation. A coherent optical system is thus able to provide effective and cost-efficient parallel processing in reconstructing coherent Doppler tomograms.

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J. S. Hu, G . Flesher, H. Ansari, and G. Wade "Optical Processing Of Coherent Doppler Tomograms", Proc. SPIE 0388, Advances in Optical Information Processing I, (23 December 1983); https://doi.org/10.1117/12.935003

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