GB/T 7962.7-2025: Test methods of colourless optical glass - Part 7: Extent of striae

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Scope

This document describes the test principle, instruments, sample, test conditions, test procedures,
result expression, and test report for the extent of striae of colorless optical glass.
This document applies to the testing of the extent of striae of colorless optical glass. It can be
used as a reference for testing the extent of striae of other materials that transmit light in the
test wave band.

Basic Data

Standard ID	GB/T 7962.7-2025 (GB/T7962.7-2025)
Description (Translated English)	Test methods of colourless optical glass - Part 7: Extent of striae
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	L50
Classification of International Standard	81.040.01
Word Count Estimation	14,140
Date of Issue	2025-06-30
Date of Implementation	2026-01-01
Older Standard (superseded by this standard)	GB/T 7962.7-1987
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration