foster + freeman

Description

GRIM^®3, uses the widely accepted forensic laboratory technique for glass RI determination, the oil immersion/temperature variation method. The system operates through a standard laboratory microscope with phase contrast optics and a Mettler hotstage for temperature control.  Using GRIM^®3, repeat measurements produce results with a standard deviation of, typically, 0.00002RI.

GRIM^®3 can  monitor up to four glass fragment edges per operation, speeding the casework examination process, giving improved statistical accuracy and  reducing calibration time.

Casework measurements are filed, password protected, with the essential information that identifies each fragment of glass examined, including for example its source, casework reference, and  operator identity. Basic statistics are generated including average, range, spread and standard deviation. Results may be displayed as scatter diagrams and formatted for exportation to Microsoft Office for additional analysis.

Specifications

GRIM^®3: Basic Package

 

GRIM^®3 processor unit with serial/USB interface for video and hotstage control.

• AVT Stingray Fire Wire 800 camera
• Windows2000 or XP compatible software.
• Microsoft Office compatible database.
• GRIM^®3 software supplied on CD-ROM.

Required Ancillaries

Computer

Leica DM 2500 or Leica DMLB phase contrast microscope.

• Long working distance 10x phase contrast objective.

• 589nm interference filter

Mettler hotstage model FP82HT.

Reference Glasses and Immersion Oils