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The Crime-lite ASV is a bench-top viewing enclosure for the stimulation of infrared activated anti-Stokes fingerprint dusting powders.
Anti-Stokes powders absorb invisible infrared radiation and re-emit the energy at visible wavelengths, a process that is the reverse of standard fluorescence.
Excellent results can be obtained with fingerprints on 'busy' multicolored backgrounds and on backgrounds which fluoresce at similar wavelengths to standard fingerprint treatments.
Latent fingerprints, invisible under white light, appear to glow brightly in the visible spectrum when dusted with anti-Stokes (up-convertor) powder and illuminated under an intense infrared light.
Visualisation of fingerprints using anti-Stokes powders is of particular use in situations where background fluorescence overwhelms the fluorescence produced using alternative fingerprint dyes/stains, on exhibits that cannot be 'dipped' into wet treatments such as BY-40, and on metal exhibits (this is due to the magnetic properties of anti-Stokes powders).
The Crime-lite ASV is a bench mounted laser viewing enclosure for the stimulation of anti-Stokes fingerprint dusting powders (available seperately).
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