CNS 12525-2002 Materials for glass spectacle lenses《玻璃类眼镜片材料》.pdf

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1 印行年月94年10月 本標準非經本局同意不得翻印 中華民國國家標準 CNS 總號 類號 ICS 11.040.70 T2041 12525 經濟部標準檢驗局印行 公布日期 修訂公布日期 78年5月19日 91年3月7日 (共2頁) 玻璃類眼鏡片材料Materials for glass spectacle lenses 1.適用範圍:本標準適用於無色及有色之玻璃類眼鏡片材料。 (1)冕牌玻璃( CROWN GLASS) (2)火石玻璃(FLINT GLASS) (3)鋇類玻璃(BARIUM GLASS) 2.用語釋義 2.1色散與阿貝數 (ABBE MUMBER):空氣中玻璃對C、F及d之光譜線折射率分別為N、Nf及nd。色散率的倒數為阿貝數(Vd),其數值計算如下: Vd=nn1nCFd0相關的光譜線波長為: 氫(Hydrogen)原子C光譜656.3奈米 氫(Hydrogen)原子F光譜486.1奈米 鈉(Sodium)原子D光譜589.3奈米 氦(Helium)原子d光譜587.6奈米 鎘(Cadmium)原子C光譜643.8奈米 鎘(Cadmium)原子F光譜480.0奈米 (1奈米(nm)=10-9m=10埃() 3.折射率:本品各類型玻璃材料之折射率應符合下表規定

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