4. Optical: systems and elements
  5. Compound lens system
  6. Variable magnification

Akiko Furuta

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Finder optical system

Optical: systems and elements – Lens – With variable magnification
Patent

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Keplerian variable magnification viewfinder

Optical: systems and elements – Compound lens system – Variable magnification
Patent

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Optical system having a focal point detection device

Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent

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Re-imaging converter lens apparatus and method

Optical: systems and elements – Compound lens system – Telescope
Patent

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Zoom lens system

Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate

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Profile ID: LFUS-PAI-P-188072

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