Research Papers

Optical properties of the medulla and the cortex of human scalp hair

[+] Author Affiliations
Aleksey Kharin, Babu Varghese, Rieko Verhagen, Natallia Uzunbajakava

Philips Electronics BV, Philips Research Europe, Care & Health Applications, High Tech Campus 34, 5656 AE Eindhoven, The Netherlands

J. Biomed. Opt. 14(2), 024035 (April 13, 2009). doi:10.1117/1.3116712
History: Received September 10, 2008; Revised December 23, 2008; Accepted February 11, 2009; Published April 13, 2009
Text Size: A A A

An increasing number of applications, including non- or minimally invasive diagnostics and treatment as well as various cosmetic procedures, has resulted in a need to determine the optical properties of hair and its structures. We report on the measurement of the total attenuation coefficient of the cortex and the medulla of blond, gray, and Asian black human scalp hair at a 633-nm wavelength. Our results show that for blond and gray hair the total attenuation coefficient of the medulla is more than 200 times higher compared to that of the cortex. This difference is only 1.5 times for Asian black hair. Furthermore, we present the total attenuation coefficient of the cortex of blond, gray, light brown, and Asian black hair measured at wavelengths of 409, 532, 633, 800, and 1064nm. The total attenuation coefficient consistently decreases with an increase in wavelength, as well as with a decrease in hair pigmentation. Additionally, we demonstrate the dependence of the total attenuation coefficient of the cortex and the medulla of Asian black hair on the polarization of incident light. A similar dependence is observed for the cortex of blond and gray hair but not for the medulla of these hair types.

Figures in this Article
© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Aleksey Kharin ; Babu Varghese ; Rieko Verhagen and Natallia Uzunbajakava
"Optical properties of the medulla and the cortex of human scalp hair", J. Biomed. Opt. 14(2), 024035 (April 13, 2009). ; http://dx.doi.org/10.1117/1.3116712


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.