The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 1987
Filed:
Jul. 02, 1986
Jean P De Rigal, Claye Souilly, FR;
Jean-Luc M Leveque, Le Raincy, FR;
Laurent B Rasseneur, Thorigny S/Marne, FR;
Marie-Jeanne Losch, Stains, FR;
'L'Oreal', Paris, FR;
Abstract
Apparatus for measuring the Young's modulus or the internal damping coefficient of skin, for example human skin, in vivo, comprises a rectangular frame of non-metallic material to be adhered by means of double-sided adhesive tape to the surface of skin to be tested, and a movable assembly also adherable to the skin surface by means of tape. The frame carries a vibration exciter in the form of a coil co-operating with a magnetic bead on the movable means, and also an opto-electronic movement sensor comprising an optical transmitter and receiver mounted next to one another on the frame and an optical reflector on the movable means for reflecting back to the light receiver the beam emitted by the light transmitter. The electronic circuit includes a frequency scanning low-frequency generator and means for recording the frequency and the vibration amplitude as measured by the sensor, to plot the amplitude against the frequency for determining the resonance frequency and other characteristics such as the width of the resonance peak at half-height.