Sensitive, relatively inexpensive instrument uses phase-detection techniques to sense presence of objects. Phase-sensitive detectors, LED, photodiode with response matched to LED output, and filtering lens allow detector to operate over narrow radiation band, giving selectivity over stray light.


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    Title :

    Optical proximity detector


    Contributors:

    Published in:

    Publication date :

    1977-06-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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