This International Standard describes the stress op-tical method for determining the birefringence in glass, especially in raw optical glass in bulk and pre-shaped forms. This method is also used in photo-elasticity.
NOTES
1 The calculation of the elastomechanical stress from the birefringence is not the subject of this International Stan-dard.
2 The indication on the drawings of birefringence is specified in ISO 10110-2 (see reference [2] in annex A).
This test method is applicable for simple geometrical shapes of glass (see clause 5).