1 Scope
This part of GB/T 7962 specifies the test method principle, apparatus, test steps and data processing for the spectral internal transmittance of colourless optical glass.
This part is applicable to the test on the spectral internal transmittance 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 corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to 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
For the purposes of this part, the following term and definition apply.
3.1
internal transmittance
tλ
ratio of luminous flux passing through internal ending point and starting point of the glass, excluding the internal transmittance loss by surface reflection
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sample
7 Test steps
8 Data processing
