View differences in paint or attempts to cover up criminal activity or surveillance devices

Mouseover to view white wall under fluorescence examination

TECHNOLOGY FOR FORENSIC LIGHT SOURCE EXAMINATION

 

Counter Surveillance

 

Specialist lighting techniques using high intensity LED light sources can be used to detect evidence of tampering that is difficult to see or perhaps invisible to the naked eye.

 

Oblique illumination

By lighting surfaces at an oblique angle 3D objects and variations in texture become exaggerated as shadows form behind raised areas. This effect is intensified as the lighting angle reduces.

 

Contrast examination

Objects of different colours reflect or absorb different wavelengths of light. By narrowing the waveband of light conrast between two different materials or surfaces can be increased.

 

Fluorescent Examination

Different material types absorb different wavelengths of light and emit fluorescence. Goggles and filters can be used to block all light except the fluorescent emission. This technique can be used to see through layers of paint revealing fluorescence below the surface

THE FOLLOWING PRODUCTS CAN BE USED FOR COUNTER SURVEILLANCE SEARCHES

Crime-lite 82S a range of light sources for crime scene or laboratory

Crime-lite 42S a range of powerful dual-colour light sources 

Crime-lite 2 single-LED infrared light source

Crime-lite 8x4MK2 the multi-wavelength photographic ring light