GRIM3
Definition
Glass Refractive Index Measurement instrument, third generation. Hot-stage microscopy with sodium D-line illumination; reports RI to ±0.00002.
Related terms
- 3R Rule
- The fracture-analysis mnemonic: Radial cracks form at Right angles to the Reverse (far, non-impact) side of the glass. Applied to the fracture...
- Concentric Fracture
- An arc-shaped fracture encircling the impact zone, produced by outer-table bending tension at a distance from the focal impact; always post-dates the...
- Hackle Lines
- Fine secondary cracks on the fracture surface that fan from the origin, perpendicular to the moving crack front. Used to track crack...
- PDQ
- Paint Data Query database (RCMP-maintained). Cross-referenced from glass work when a vehicle is identified through paired glass and paint evidence.
- Radial Fracture
- Cracks that run outward from the point of impact like spokes on a wheel. Form first, on the side opposite the force.
Explained in
- Glass Evidence: Fracture Patterns and Refractive IndexGlass Refractive Index Measurement instrument, third generation. Hot-stage microscopy with sodium D-line illumination; reports RI to ±0.00002.