Determination of a degree of elongation of hair using a NIR sensor

US11857332B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Hans Georg Knuebel · Goldkronach, DE
• Lucile Bonnin · Dressendorf, DE
• Astrid Kroos · Monheim, DE
• Annika Koenen · Grevenbroich, DE
• Erik Schulze zur Wiesche · Hamburg, DE

Key dates

• Filing date: Apr 26, 2019
• Grant date: Jan 2, 2024
• Expiry date: Jan 9, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/127
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An arrangement for determining a degree of stretching of hair is provided. The arrangement includes a detection unit for detecting hair characteristics and an evaluation unit for evaluating the detected hair characteristics and for determining the degree of elongation of hair based on the detected hair characteristics. The detection unit contains a near-infrared sensor, and is configured to irradiate a hair sample with electromagnetic waves in the infrared range and to detect an absorbance of the hair sample in a wavelength range from about 800 to about 2500 nm. The acquisition unit is configured to generate an absorption spectrum of the hair sample in the wavelength range of from about 800 to about 2500 nm and provide it to the evaluation unit and the evaluation unit is configured to compare the generated absorption spectrum with a calibration model and to determine a degree of elongation of the hair sample.