4. Optics: image projectors
  5. Particular condenser

Stephen K. Eckhardt

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Color-splitting optical element and an optical system...

Optical: systems and elements – Single channel simultaneously to or from plural channels – By refraction at beam splitting or combining surface
Reexamination Certificate

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Compound polarization beam splitters

Optics: image projectors – Polarizer or interference filter
Reexamination Certificate

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Compound polarization beam splitters

Optics: image projectors – Polarizer or interference filter
Reexamination Certificate

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Condensers for illumination systems

Optics: image projectors – Particular condenser
Patent

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Condensers for overhead projectors

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

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Profile ID: LFUS-PAI-P-1273799

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