TANGO

In-Vivo Hair Shine Analysis

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Features

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VIVO / VITRO

Our imaging technology enables analysis of light on any kind of in-vivo or in-vitro hair samples

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FAST MEASUREMENT

Image your hair sample - head or swatch - in just a few seconds

ADAPTABLE SETUP

The head sensor can be place on a tripod or in a more fixed setup for different situations

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PLUG & PLAY

No special installation is needed - easy cabling and the system is ready to go

Overview

Hair shine is usually measured in a constrained environment. Even our SAMBA Hair System needs a hair sample to be put on a cylindrical geometry to correctly separate the light components, and to ensure that a shine band is visible and that we can compute a luster coefficient.

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The TANGO system relies on a different and innovative polarization imaging technique to separate the different components of the light reflected and diffused by hair fibers without having to constrain the fibers in any way. Therefore, the TANGO system enables the analysis of shine in more diverse conditions (specific haircut, ethnic fibers, etc.) than the usual technique.

Principle

The TANGO system enables the separation of the components of light coming from a hair fiber which are :

  • External reflection (or Shine)
  • Internal reflection (or Chroma)
  • Diffusion

The TANGO uses a method based on the polarization signature carried by each component. This method requires the use of a pulsed polarized illumination system coupled with a polarization analysis imaging system

The illumination system goes through a Polarization State Generator (PSG). As a result, the emitted light is polarized, its polarization state being controlled by the PSG. Light coming back from the illuminated sample goes through a Polarization State Analyzer before going to the imaging system (video camera).

To separate the three components, N images are acquired (N≥4), corresponding to N couple of polarization states (PSGN, PSAN). The acquisition of each image and the control of PSG and PSA is done using a computer. The N acquired images are then analyzed and processed to separate the contributions for each pixel of the image.

Some examples of the resulting processed images are shown below. Three hair swatches of blond, brown and black colors have been put on a cylinder. The shine and chroma bands, as well as the diffused light are perfectly separated.

Below are the images obtained on a single mannequin head, for which the TANGO enables separation of Shine, Chroma and Diffused.

Specifications

GENERAL SPECIFICATIONS
Camera
Color Camera 12 bits
Resolution
2,464 x 2,056 pixels
Focus
adjustable up to 3 meters
Illumination
Pulsed White Led
Software
TANGO

Windows 10
Measurement time
1 second for a single accumulation
Calibration
Factory calibrated
Size
9" x 8.5" x 8.5 "
(230mm x 220mm x 220mm)
Power
110/200 VAC, 50/60 Hz
DATA
Data saved
Raw images (12 bits)
Processed images (32 or 34 bits)
Data export
Images export (png)
Excel for numerical data
HAIR SAMPLE SPECIFICATIONS
Hair characteristics
Any type / shape / color
In-vivo or vitro

Resources

Documentation

Scientific publications​