Standard No.:	GB/T 7962.11-2010
English Name:	Test method for colourless optical glass—Part 11：Precise test method for refractive index in the visible wave band
Chinese Name:	无色光学玻璃测试方法　第11部分：可见折射率精密测试
Chinese Classification:	N05    Material and component for instrument and meter
Professional Classification:	GB    National Standard
ICS Classification:	81.040.01 81.040.01    Glass in general 81.040.01
Issued by:	AQSIQ
Issued on:	2011-1-14
Implemented on:	2011-5-1
Status:	valid
Superseding:	GB/T 7962.11-1987
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	170.0
Delivery:	via email in 1 business day

1 Scope This part of GB/T 7962 specifies the principle, apparatus, measurement steps and result calculation method for the measurement of refractive index of colorless optical glass by minimum deviation angle of approach. This part is applicable to the precise measurement for the refractive index of colourless optical glass in the visible wave band. 2 Normative references The following documents contain provisions which, through reference in this part of GB/T 7962, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part. GB/T 903 Colourless optical glass 3 Terms and definitions minimum deviation angle of approach method calculating the refractive index by measuring the minimum deviation angle of light passing through the prism

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Method principle 5 Test apparatus 6 Sample requirements 7 Measurement 8 Result calculation