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UV-VIS-IR Imaging Techniques
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Fluorescence Imaging Many latent fingerprint treatments such as Ardrox, DFO, BY40 and fluorescent powders fluoresce under specific wavelengths of light. Using the DCS 5 multi-wavelength ring light an operator is able to select the optimum wavelength to generate the maximum intensity of fluorescence for each type of treatment.
Image: Plastic bag treated with Polycyano UV and examined under UV illumination. *Mouse-over to reveal visible image |
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Infrared Imaging Interfering backgrounds may be suppressed appearing white as they reflect IR whereas some chemical treatments such as Physical Developer and certain powders absorb IR and appear black. Foster + Freeman’s new fingerprint dusting powder ‘fpNatural 1’ fluoresces brightly in the infrared when illuminated with a red light. Its application has the advantage of eliminating interference from most backgrounds which rarely fluoresce at this wavelength.
Image: Polymer banknote treated with fpNatural 1 IR Fluorescent Powder, illuminated with red light using the Crime-lite 8x4Mk3 and viewed in the IR. *Mouse-over to reveal visible image |
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Reflected UV Imaging Many surfaces such as glass and plastics absorb UV and appear black, which improves the visibility of both treated and untreated latent prints which often reflect UV. Images can then be significantly enhanced using the DCS5 software.
Image: Untreated latent fingerprint on clear perspex. Perspex appears black when illuminated and viewed under UV revealing the fingerprint which reflects UV. *Mouse-over to reveal visible image |
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Imaging Techniques | Enhancement Software | System Components | Find Out More |
Enhancement Software
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Using a combination of 3D enhancement techniques to improve the contrast and ridge detail of a fingerprint in soft putty |
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Imaging Techniques | Enhancement Software | System Components | Find Out More |
System Components
In order to accommodate the differing requirements of fingerprint laboratories worldwide, DCS 5 is a modular system that can be expanded through the addition of application-specific modules. The DCS 5 core provides a complete solution to the capture and enhancement of fingerprints within the visible spectrum and includes a Windows PC running the DCS 5 Software, a pro-grade photographic copy stand, and a selection of light guide clamps and mounts. Additional modules can be selected to provide IR, Reflected UV, and Shift/Tilt Imaging capabilities.
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DCS 5 core | +IR Imaging Module | +R-UV Imaging Module | +Shift/Tilt Imaging Module | |||
Camera with Macro Lens | IR Imaging Ring Light | UV Transmitting Lens | Shift/Tilt Lens | |||
Halogen Light Source | FLS Light Source | UV Light Source | Shift/Tilt Lens Kit | |||
Multi-wavelength Ring Light | IR Imaging Filter Kit | R-UV Imaging Filter Kit | ||||
Professional Copy Stand | ||||||
DCS 5 Software | ||||||
PC Hardware |
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