4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Seiichi Ohgoshi

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Apparatus for detecting a focusing state of an optical system

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent

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Optical shutter

Optical: systems and elements – Light interference – Electrically or mechanically variable
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1213322

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