Comparison Microscope and Borescope
Instruments like Stereomicroscope, Comparison Microscope, and Borescope are used for individual examination, side-by-side comparison, superimposition, and analysis of barrels in forensic investigations. Comparison microscopes are used for examining fired cartridge cases but have limitations such as being manual, tedious, and time-consuming. On the other hand, borescopes offer a different approach for analyzing the barrel with full and side views. These tools play a crucial role in detecting projectile velocity and analyzing databases in crime labs.
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Comparison Microscope and Borescope Ujaala Jain Assistant Professor, SoFS
INSTRUMENTS FOR ANALYSIS Stereomicroscope- Individual examination Comparison Microscope- Side by Side, Superimposition Borescope- Analysis of the Barrel BDAS- Detection of projectile velocity IBIS/ NIBIN- Database analysis
COMPARISON MICROSCOPE REFERENCE FIRED CARTRIDGE CASE EVIDENCE FIRED CARTRIDGE CASE Louise Walzer, JPSO Crime Lab
EVIDENCE FIRED CARTRIDGE CASE REFERENCE FIRED CARTRIDGE CASE Louise Walzer, JPSO Crime Lab
EVIDENCE REFERENCE Louise Walzer, JPSO Crime Lab
LIMITATIONSOF COMPARISON MICROSCOPE: Manual, tedious and time consuming Evidences compared piece by piece to vast inventory of crime/ test exhibits Necessity of searching each piece manually Severe stress and eyestrain slowed the process even more
IMAGES OF THE BARREL Full view of the barrel Side view of the barrel
