Growth Inhibition and Transient Temperature Measurement of Laser-Irradiated Hair Fibers and Follicles
L K. Iwaki, T Heimer, Edwin J. Heilweil, P A. Manos
Temperature changes, infrared (IR) images, and heat propagation kinetics of laser irradiated hair fibers and live follicles were measured using a cooled InSb focal plane array detector. Pulsed irradiation of different colored hair follicles under controlled fluence conditions produces catagenic induction with differences in maximum attained temperature. Fibers rich in eumelanin (black/brown and dark brown) produced maximum IR temperatures of 400K and 374K, while hair containing pheomelanin (blond, gray and red fibers) yielded 315K, 310K and 301K, respectively. Maximum temperatures occurred at the end of 50 ms laser pulses with emission decays of several hundred milliseconds.
hair fibers, hair follicles, heat propagation, infrared cameras, infrared emission, IR focal planes, laser heating, temperature dynamics, time-resolved infrared
, Heimer, T.
, Heilweil, E.
and Manos, P.
Growth Inhibition and Transient Temperature Measurement of Laser-Irradiated Hair Fibers and Follicles, Optics Letters
(Accessed December 4, 2023)