目 录
1 范围··························································································…… (1)
2 概述·························································································…… (1)
3计量性能要求·············································································…… (1)
4 通用技术要求··············································································…… (1)
4.1 外观·······················································································…… (1)
4.2 维护保养················································································…… (2)
4.3 几何参数·················································································…… (2)
5 计量器具控制··············································································…… (2)
5.1检定条件·················································································…… (2)
5.2 检定项目·················································································…… (3)
5.3 检定方法·················································································…… (3)
5.4检定结果的处理········································································……(5)
5.5 检定周期·················································································…… (5)
附录A 常用折射液的折射率及配制方法 ························-····················…… (6)
附录B 折射率 (nu)值的测量不确定度评定方法 ·································…… (7)
附录C 平均色散 (n;一n.)值的测量不确定度评定方法 ························…… (10)
附录D 阿贝折射仪标准块检定记录 ···················································…… (12)
附录E 阿贝折射仪标准块检定证书、检定结果通知书 (内页)格式 ·········…… (14)
阿贝折射仪标准块检定规程
范 围
本规程适用于阿贝折射仪标准块的首次检定、后续检定和使用中检验。阿贝折射仪
配备的工作样块的折射率检定依照本规程执行。
2 概述
阿贝折射仪标准块 (以下简称标准块)是用来检定阿贝折射仪及其他利用阿贝折射
原理的计量仪器的标准计量器具 (块)。阿贝折射仪工作样块 (以下简称工作样块)是
阿贝折射仪配备的，用于调整、检查阿贝折射仪。
标准块组由轻冕玻璃QK1，冕玻璃K9，火石玻璃F2，重火石玻璃ZF2四种优质光
学玻璃材料加工制成的长方形块组成。
光学玻璃材料折射率的测量主要有精密测角法、V棱镜折射法、阿贝折射法及浸液
法。本规程采用V棱镜折射法。
利用V棱镜折射仪，采用比较测量法，对标准块组的各三条谱线的折射率进行测
量。用D谱线测得折射率nD值，用F谱线与C谱线测得的n;与n,值之差即为平均色
散 (n;一nc)值。如需测量其他谱线的折射率 (如n.)值，则应采用相应的谱线 (如
汞灯中的e线)。
V棱镜折射法测量原理如下:
如图1所示，当单色平行光束垂直人射到V棱镜后，经 V棱镜和样品的多次折射，
出射光线发生偏折。根据折射定律，按公式 (1)计算样品的折射率 n
n=(n孟+sing伽孟+si.10)111 (1)
式中:%- V棱镜光学玻璃的折射率;
B— 光束从V棱镜最后一面出射的偏折角。
当n=n。时，0=0;
当n大于n。时，0为正值;
当n小于n。时，.B为负值。
