4. Optical: systems and elements
  5. Lens
  6. Including a nonspherical surface

Ikuo Nakano

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Aberration detecting method, optical recording and...

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

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Aberration detection device, aberration detection method,...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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Apparatus and method for optical recording/reproducing...

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing
Reexamination Certificate

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Focal point dislocation detecting method and optical pickup...

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

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Lens, optical pickup device, and method for detecting lens...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2182844

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