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Fiber Diameter and Ellipticity
BOSSA NOVA VISION, California
Robert George - Sebastien Breugnot
5777 W. Century Blvd
Suite 205 - LOS ANGELES
CA 90045 USA
Tel: +1 (424)-393-4011
Fax: +1 (310) 943-3280
www.bossanovavision.com
info@bossanovavision.com
Overview of Bossa Nova Vision
BOSSA NOVA Vision, formerly BOSSA NOVA
Technologies, is a LLC (Limited Liability
Company) founded in 2018, located in Los
Angeles, USA
Small business of 4 people specialized in
optics, electronics, imaging and software
development (3 PhDs, 1 Engineer)
LAX
Los Angeles
International Airport
2
Human hair diameter can vary from 17 to 180
microns :
» Ethnicity
» Age
» Genetics
Measuring hair fiber diameters :
 is important for hair type classification
 is an essential parameter to study its
mechanical properties (torsion,
elasticity, etc..) or its density/porosity
properties.
Fiber diameter measurement
3
Image from belgraviacentre website :
https://www.belgraviacentre.com/blog/shrinking-hair-
shaft-diameter-during-hair-transplants
Introduction
4
Microscopic vision Laser scanning
Image from :
https://www.mitutoyo.co.jp
No measurement of
diameter across the whole
fiber length/revolution
No ellipticity
Doesn’t work on
transparent fiberImage from :
http://www.microlabgallery.com
Fiber diameter measurement
Current techniques
Fast measurement of the diameter
of the shape obstructing the laser sheet
Use of microscopic calibrated images
to measure fiber diameter
Does not provide
any image of the
fiber
Drawbacks
Drawbacks
Bolero Mono : Hardware
5
6
Bolero Mono : Hardware
Camera
WhiteLEDPanel
Rotation stage
Fiber
Setup
Fiber
7
Bolero Mono : Hardware
Auto-centering and focus
1. of fiber position
2. of camera focus
Automatic adjustment
1
2
Acquisition of 18
images of the fiber
Automatic measurement
3D model
Numerical Data
8
Bolero Mono : Software
InterfaceAnalysis selectionLive Image
Measurements
9
Bolero Mono : Software
Interface
Analysis selection
 Volume measurement :
Full analysis with the acquisition of 18 images
 Single Image Analysis
Analysis on a single image
Orientation is set by the user
Data selection
 Data Management :
Manage data to be saved and processed
User can create/delete/copy/rename/etc.
different folder and measurement.
 Data Analysis :
Analysis, comparison and export of data
 Data Visualization :
Visualize the results of a single selected
measurement
10
Bolero Mono : Software
Numerical results (1)
Fiber diameter along
the hair main axis
11
Bolero Mono : Software
Numerical results (2)
Fiber diameter depending on orientation Overall average :
 Minimum diameter
 Maximum diameter
 Ellipticity
Same fiber – 4 measurements
12
Bolero Mono : Software
Numerical results (3)
At each Z-position :
 Minimum diameter
 Maximum diameter
 Ellipticity
 Slice shape
 Slice surface
Same fiber – 4 measurements
13
Bolero Mono : On-going development
Automatic-loading system
(retro-fit with current system)
Fiber swelling measurement
(no retro-fit with current system)
Cuvette
After immersion in liquid, the swelling of the
fiber can be measured
Conclusions
 BOLERO Mono is a robust, turn-key system whose
aim is to provide reliable diameter and ellipticity
measurement for all type of fibers
 BOLERO Mono can deliver a 3D model of a hair
fiber as well a repeatable numerical data
 Data management, comparison and export is very
easy thanks to a user friendly software
14
5777 W. Century Blvd
Suite 205 - LOS ANGELES
CA 90045 USA
Tel: +1 (424)-393-4011
Fax: +1 (310) 943-3280
www.bossanovavision.com
info@bossanovavision.com
Thank you !
For further questions
feel free to contact us
:

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Bolero Mono

  • 1. Fiber Diameter and Ellipticity BOSSA NOVA VISION, California Robert George - Sebastien Breugnot 5777 W. Century Blvd Suite 205 - LOS ANGELES CA 90045 USA Tel: +1 (424)-393-4011 Fax: +1 (310) 943-3280 www.bossanovavision.com info@bossanovavision.com
  • 2. Overview of Bossa Nova Vision BOSSA NOVA Vision, formerly BOSSA NOVA Technologies, is a LLC (Limited Liability Company) founded in 2018, located in Los Angeles, USA Small business of 4 people specialized in optics, electronics, imaging and software development (3 PhDs, 1 Engineer) LAX Los Angeles International Airport 2
  • 3. Human hair diameter can vary from 17 to 180 microns : » Ethnicity » Age » Genetics Measuring hair fiber diameters :  is important for hair type classification  is an essential parameter to study its mechanical properties (torsion, elasticity, etc..) or its density/porosity properties. Fiber diameter measurement 3 Image from belgraviacentre website : https://www.belgraviacentre.com/blog/shrinking-hair- shaft-diameter-during-hair-transplants Introduction
  • 4. 4 Microscopic vision Laser scanning Image from : https://www.mitutoyo.co.jp No measurement of diameter across the whole fiber length/revolution No ellipticity Doesn’t work on transparent fiberImage from : http://www.microlabgallery.com Fiber diameter measurement Current techniques Fast measurement of the diameter of the shape obstructing the laser sheet Use of microscopic calibrated images to measure fiber diameter Does not provide any image of the fiber Drawbacks Drawbacks
  • 5. Bolero Mono : Hardware 5
  • 6. 6 Bolero Mono : Hardware Camera WhiteLEDPanel Rotation stage Fiber Setup Fiber
  • 7. 7 Bolero Mono : Hardware Auto-centering and focus 1. of fiber position 2. of camera focus Automatic adjustment 1 2 Acquisition of 18 images of the fiber Automatic measurement 3D model Numerical Data
  • 8. 8 Bolero Mono : Software InterfaceAnalysis selectionLive Image Measurements
  • 9. 9 Bolero Mono : Software Interface Analysis selection  Volume measurement : Full analysis with the acquisition of 18 images  Single Image Analysis Analysis on a single image Orientation is set by the user Data selection  Data Management : Manage data to be saved and processed User can create/delete/copy/rename/etc. different folder and measurement.  Data Analysis : Analysis, comparison and export of data  Data Visualization : Visualize the results of a single selected measurement
  • 10. 10 Bolero Mono : Software Numerical results (1) Fiber diameter along the hair main axis
  • 11. 11 Bolero Mono : Software Numerical results (2) Fiber diameter depending on orientation Overall average :  Minimum diameter  Maximum diameter  Ellipticity Same fiber – 4 measurements
  • 12. 12 Bolero Mono : Software Numerical results (3) At each Z-position :  Minimum diameter  Maximum diameter  Ellipticity  Slice shape  Slice surface Same fiber – 4 measurements
  • 13. 13 Bolero Mono : On-going development Automatic-loading system (retro-fit with current system) Fiber swelling measurement (no retro-fit with current system) Cuvette After immersion in liquid, the swelling of the fiber can be measured
  • 14. Conclusions  BOLERO Mono is a robust, turn-key system whose aim is to provide reliable diameter and ellipticity measurement for all type of fibers  BOLERO Mono can deliver a 3D model of a hair fiber as well a repeatable numerical data  Data management, comparison and export is very easy thanks to a user friendly software 14
  • 15. 5777 W. Century Blvd Suite 205 - LOS ANGELES CA 90045 USA Tel: +1 (424)-393-4011 Fax: +1 (310) 943-3280 www.bossanovavision.com info@bossanovavision.com Thank you ! For further questions feel free to contact us :