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

Tsung-Kai Chang

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Adjustable optical pickup actuator

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

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Driving apparatus for fine-tuning focus

Optical: systems and elements – Lens – With support
Reexamination Certificate

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Focus driving apparatus with impact resistance

Optical: systems and elements – Lens – With support
Reexamination Certificate

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Objective lens for optical pick-up head of optical disk drive

Optical: systems and elements – Lens – Including a nonspherical surface
Patent

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Profile ID: LFUS-PAI-P-1314936

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