RUMBA TECHNOLOGY
 

 

When hair fibers are illuminated by a light source, part of the incident light is reflected on the surface of the hair - specular component - and part is transmitted through to hair fiber and reflected on the back surface - chroma component -.
 
Hair fibers present a natural birefringence, which orientation axis is aligned with the fiber axis. Using the birefringence polarization signature, RUMBA measures the birefringence information and therefore the orientation of the hair fiber.
 
 

Using near infrared illumination permits to measure the birefringence of every type of hair - from blond to dark - as they are more transparent in the near infrared as they are in the visible spectrum (see Below). Both hair tresses (dark and blond) appear white in the NIR.

Visible
NIR
Visible
NIR
For more detailed information about RUMBA technology, please check RUMBA resources. Using polarization imaging and analysis (patented technique), RUMBA is able to deliver images and data of the orientation of the hair fiber for each pixel.
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