4. Optics: measuring and testing
  5. By light interference
  6. For dimensional measurement

Neal Allen Hall

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Displacement sensor employing discrete light pulse detection

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Highly-sensitive displacement-measuring optical device

Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate

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Highly-sensitive displacement-measuring optical device

Optics: measuring and testing – By light interference – Having wavefront division
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2993744

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