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Overhead Projector Lenses

Transmissive Lenses - A transmissive overhead projector lens consists of two positive Fresnel lenses having the same facet spacing, that are optically aligned and bonded together. The Fresnel grooves are inside and thus protected.

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Reflective Lenses - A reflective overhead projector lens is a second surface mirror used to reflect light from the lamp to the projection lens system both located above the Fresnel lens.

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Reflective overhead projector

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