| 1. | The Meade ACF telescope uses an OG530 Orange Schott Optical Glass Filter.
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| 2. | Optical glass for spectacles has been used since the late Middle Ages.
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| 3. | Abbe was instrumental in the development of the famous Jena optical glass.
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| 4. | Fluoride glass may also mean an oxide optical glass doped with zirconium tetrafluoride.
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| 5. | Other experiments involve making high-quality optical glass and semi-conducting materials, the dispatch said.
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| 6. | The first spectacles utilized quartz lenses since optical glass had not been developed.
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| 7. | :: : Also, low-end models also use lower quality optical glasses for their lenses.
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| 8. | The company started to produced optical glass during the early 1940s for military use.
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| 9. | Phosphate glass constitutes a class of optical glasses composed of metaphosphates of various metals.
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| 10. | German optics was overwhelmingly superior, as exemplified by Carl Zeiss lenses and optical glass.
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