White-Light Optical Information Processing and Holography.
Annual rept. 15 Feb 82-14 Feb 83,
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ELECTRICAL ENGINEERING
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During the second year FY82 a great deal of progress has been made on the white-light optical information processing and holography research program. In this period, we have evaluated the coherence requirement, source encoding, and signal sampling concept for the proposed white-light optical signal processor. We have shown that the spatial coherence requirement is governed by source distributions, while the temporal coherence requirement is controlled by spatial frequency bandwidth of the input signal and the grating sampling frequency. In order to alleviate the basic constraints of a white-light source, we have developed a source encoding and signal sampling concept, so that the information can be processed in complex amplitude for the entire spectral band of the white-light source. We have also evaluated an apparent transfer function for the proposed white-light signal processor. We have shown that the MTF is dependent upon the degree of spatial and temporal coherence. The derived apparent transfer function is very general, which can be applied to any partially coherent optical processor. Since the proposed white-light signal processor is very suitable for color image processing, we have, in this period, also demonstrated several color image processing capabilities. Among those are broadband color image deblurring and color image subtraction. From those results, we have seen high quality deblurred color images and subtracted color images can be performed by the proposed white-light optical processor. We have also in this period evaluated the primary aberrations and the bandwidth requirements for rainbow holographic processes. The conditions for the removal of the five primary aberrations are also determined. Author
- Information Science