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Objective lens exchanging arrangement in a microfilm reader

Optics: image projectors – Lens support – Lens position adjustable
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Optical apparatus and projector

Optics: image projectors – Lens support
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Optical apparatus in which image distortion is removed

Optics: image projectors – Lens support – Lens position adjustable
Patent

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Optical assembly for a projection system

Optics: image projectors – Lens support
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Optical device

Optics: image projectors – Lens support – Lens position adjustable
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Optical engine for a projection display device

Optics: image projectors – Lens support
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Optical projection module

Optics: image projectors – Lens support – Lens position adjustable
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Optical resizing apparatus

Optics: image projectors – Lens support – Lens position adjustable
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Optical structure for microfiche reader

Optics: image projectors – Lens support – Lens position adjustable
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Overhead projection having a friction secured adjustable...

Optics: image projectors – Lens support
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Overhead projector

Optics: image projectors – Lens support – Lens position adjustable
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Overhead projector of the under mirror type

Optics: image projectors – Lens support – Lens position adjustable
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