Standard No.:	GB/T 7962.19-2010
Chinese Name:	无色光学玻璃测试方法　第19部分：磨耗度
English Name:	Test methods of colourless optical glass—Part 19:abration factor
Professional Classification:	N05 Material and component for instrument and meter
ICS Classification:	81.040.01 Glass in general
Issued by:
Issued on:	2011-01-14
Implemented on:	2011-05-01
Status:	VALID
Replace:	GB/T7962.19-1987 Colourless optical glass test methods; Relative lapping hardness
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120 (USD)
Delivery:	via email in 1-3 business day

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