Plastic CR-39

Eyeglass Lenses

CR-39 is a plastic polymer commonly used in eyeglass lenses.  It was developed by Columbia Resins in 1940.  The Armorlite Lens Company started manufacturing eyeglass lenses with CR-39 in 1947.  Today CR-39 is made by PPG industries. CR-39 has an index of refraction of 1.498 and an Abbe number of 58.  Today there are many…

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Plastic CR-39 Lens