US 11,857,332 B2
Determination of a degree of elongation of hair using a NIR sensor
Hans Georg Knuebel, Duesseldorf (DE); Lucile Bonnin, Berlin (DE); Astrid Kroos, Monheim (DE); Annika Koenen, Grevenbroich (DE); and Erik Schulze Zur Wiesche, Bielefeld (DE)
Assigned to HENKEL AG & CO. KGAA, Duesseldorf (DE)
Appl. No. 17/055,024
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
PCT Filed Apr. 26, 2019, PCT No. PCT/EP2019/060727
§ 371(c)(1), (2) Date Nov. 12, 2020,
PCT Pub. No. WO2019/219350, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 10 2018 207 557.3 (DE), filed on May 16, 2018.
Prior Publication US 2021/0204865 A1, Jul. 8, 2021
Int. Cl. A61B 5/107 (2006.01); A61B 5/00 (2006.01); A45D 44/00 (2006.01); G01N 21/359 (2014.01)
CPC A61B 5/448 (2013.01) [A45D 44/005 (2013.01); A61B 5/0075 (2013.01); G01N 21/359 (2013.01); A61B 2560/0223 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An arrangement for determining a degree of elongation of hair, comprising:
a detection unit for detecting hair characteristics; and
an evaluation unit for evaluating the detected hair characteristics and for determining a degree of elongation of hair based on the detected hair characteristics,
wherein the detection unit includes a near infrared sensor, NIRS,
wherein the detection unit is configured to irradiate a hair sample with electromagnetic waves in the infrared region and to detect an absorbance of the hair sample in a wavelength range from about 800 to about 2500 nm,
wherein the detection unit is configured to generate an absorption spectrum of the hair sample in the wavelength range from about 800 to about 2500 nm and to provide the absorption spectrum to the evaluation unit, and
wherein the evaluation unit is configured to compare the absorption spectrum with a calibration model and to determine a degree of elongation of the hair sample based on the absorption spectrum and the calibration model.