Glass | Filters |
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Different optical glass homogeneity and purity of glass material. | Different colored glass optical homogeneity and purity of the glass material. |
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Special glass | Crystals |
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Some optical glasses can be called special or particular. | Crystals are highly uniform and high-purity material. |
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Chemystry | Optics |
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The rare-earth oxides and rare as other chemicals of high purity. |
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Art |
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