Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co LtdfiledCriticalNEC Corp
Priority to JP14797975ApriorityCriticalpatent/JPS5844989B2/en
Publication of JPS5271275ApublicationCriticalpatent/JPS5271275A/en
Publication of JPS5844989B2publicationCriticalpatent/JPS5844989B2/en
PURPOSE: The accuracy of measurement values is conversely increased without decreasing the accuracy of measuring the duration of the periods even with a material of fine periods without requiring observatin by naked eyes by using a Faraday effect of Kerr effect by a reflection method.