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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Application filed by Matsushita Electric Industrial Co LtdfiledCriticalMatsushita Electric Industrial Co Ltd
Priority to JP4776175ApriorityCriticalpatent/JPS5836774B2/en
Publication of JPS51123170ApublicationCriticalpatent/JPS51123170A/en
Publication of JPS5836774B2publicationCriticalpatent/JPS5836774B2/en
PURPOSE: In holography memory device employing sound-optical element, good interference fringe is obtained by the use of the light reference light which does not penetrate sound-optical element.