4. Optical: systems and elements
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  6. Unitary sheet comprising plural refracting areas
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Holographic projection screen having a rear-facing fresnel lens

Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Patent

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Holographic screen having light absorbers for absorbing ambient

Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Patent

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