Holo-Scanner Technique for Wideband Recording.

摘要

The report describes the analysis,experimental development,and test of the new HoloFacet (TM) scanning technique for high speed optical scanning and recording of 100 lp/mm at 100MHz on a high resolution photographic film. The HoloFacet scanning technique employs the rotation of a HoloFacet within a coherent optical field,such that the resulting diffracted waves are scanned across a film surface as a succession of rapidly moving focal points. The HoloFacets are applied by well-developed holographic means to a surface which reduces the optical perturbation of the high speed system. The report also describes the transformation of the 'brassboard'holographic scanner into a recorder,for the purpose of yielding an output on a strip of photographic film permitting the analysis of the characteristics of wideband holograph recording,such as focusing accuracy,and tolerances. A 100 lp/mm was recorded on Type 3414film at 33% MTF with a video bandwidth of 100MHz and a canner speed of 52,000rpm. (Modified author abstract)