Bench-top system for the examination of latent fingerprints treated with anti-stokes fingerprint powders
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Description
The Crime-lite ASV is a bench-top viewing enclosure for the stimulation of the recently introduced infrared anti-Stokes fingerprint dusting powders.Anti-Stokes is a photoluminescent process that is the reverse of standard fluorescence. Instead of short wavelengths light being converted to long wavelengths, current anti-Stokes powders absorb invisible infrared illumination and convert it to shorter wavelengths which are visible to the eye.
This almost completely eliminates the non-fluorescent background leaving only the fingerprint visible. Excellent results can be obtained with fingerprints on 'busy' multicoloured backgrounds and on materials which fluoresce at similar wavelengths to the common fingerprint treatments.
Crime-lite ASV features:
● Safety-interlocked Class 1 laser viewing enclosure (approx. 510mm W x 425mm D x 250mm H)
● 2 x 6 Watt 976nm Lasers
● White LED interior illumination for alignment
● Laser illumination area of 45mm x 60mm
● Laser blocking fingerprint viewing/imaging window
● For use with infrared absorbing anti-Stokes fingerprint powder
● Flexible exhibit holder (pictured) and height-adjustable document bed
Applications
| Fingerprints on a Coca-Cola can treated with anti-Stokes powder and visualised within the Crime-lite ASV |  |
| Fingerprints on a brightly coloured postcard. Evidence that would be damaged by using a chemical stain |  |
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