GLASS

The smallest fragments of glass can be matched using RI measurement

TECHNOLOGY FOR THE ANALYSIS OF TRACE EVIDENCE

 

Glass Refractive Index Measurement (GRIM)

 

The refractive index of glass is a measurement of how much a beam of light is bent when it travels from the less dense medium air, to the more dense medium glass.


As different types of glass have differing refractive index measurements, it is possible to use this information to group fragments of glass together and to establish whether or not they may have originally been part of the same pane of glass.

The Foster + Freeman ffTA GRIM3 module determines the refractive indices of glass using the widely accepted laboratory standard method of oil immersion/temperature variation. 

 

 

GLASS RI MEASUREMENT CAN BE PERFORMED WITH THE FOLLOWING PRODUCTS

ffTA - multi-examination system

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