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
