4. Optics: measuring and testing
  5. Position or displacement

Siegfried Ringwald

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Distance determination

Optics: measuring and testing – Position or displacement
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Monitoring method and an optoelectronic sensor

Communications: electrical – Condition responsive indicating system – Specific condition
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Optoelectronic sensor

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
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Profile ID: LFUS-PAI-P-2760945

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