眼镜店营业员知识100问（Glasses shop salesperson knowledge 100 questions）.docVIP

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眼镜店营业员知识100问（Glasses shop salesperson knowledge 100 questions）.doc

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眼镜店营业员知识100问（Glasses shop salesperson knowledge 100 questions）

眼镜店营业员知识100问（Glasses shop salesperson knowledge 100 questions） Glasses shop salesperson knowledge 100 ask.Txt [original] salesperson knowledge 100 questions 1. how to interpret the refractive index? The ratio of the speed in which light travels in the air and the speed at which light travels in the lens (N), the thinner the refractive index, the thinner the lens. 2. lens safety center thickness (International) Resin 1.0MM glass 0.7MM Relations between 3. Abbe co dispersion and refractive index The higher the refractive index, the lower the Abbe number and the greater the dispersion 4. what are the refractive indices of glass lenses? 1.523, 1.61 (Cai Si unique) 1.7, 1.8, 1.9 5. what are the refractive indices of resin lenses? 1.499, 1.56, 1.61, 1.67, 1.701, 1.74 6. what are the processes of resin lenses? Hard plus antireflection film (film Green Amethyst film diamond gold film) with UV membrane and anti radiation membrane (EMI) staining 7. how to explain polarized lenses to customers? Such as blinds, polarized lenses allows only one direction of light through, so you can filter out part of the stray light, the light becomes soft, and can reduce glare, allows us to see more clearly the real object. Especially suitable for fishing and driving 8.50 / 18135: what do you mean? - refers to the block representation is 50 frame level 18 is the maximum diameter of the beam length to 135 leg length What does CE on the 9. frame mean? EU quality system certification 10. what are the advantages of aspherical lenses? (1) less wrinkles, beautiful appearance (2 images are vivid, clearer, less tired (3 lens lighter, more book) (4 vision wider) 11. what are the features of pure titanium frames? 1) than the average nickel alloy frame light 48% 2) corrosion are not allergic to 3) is not easy to fade 4) welding temperature of 2900 degrees, is very firm and not easy to loose 12. what are the natural materials used as frames? Wood turtle horn What do you mean by 13. NO NIKEL and NIKEL FREE