1 Scope
This part of GB/T 7962 specifies the test method for the abration factor of colourless optical glass.
This part is applicable to the test on abration factor of colourless optical glass.
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 to (excluding correction to), 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
GB/T 7962.20 Test methods of colourless optical glass - Part 20: Density
3 Terms and definitions
abration factor
value obtained by multiplying the ratio of the abration loss (volume) of the specimen to that of the standard glass (K9) by 100 under the conditions that the glass specimen under test and the standard glass are pressed against a rotating disk respectively and ground while adding abrasive
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus
5 Glass specimen under test and standard glass
6 Measurement
7 Data processing
