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. 19, 1988
Filed:
Oct. 22, 1986
Applicant:
Inventors:
Assignee:
L'Oreal, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250571 ; 356376 ;
Abstract
The invention concerns a method for examining a sample whose surface comprises reliefs, and an apparatus for carrying out the method. The apparatus comprises a sample carrier plate subjected to illumination from at least two sources having different wavelengths and whose illumination axes form an acute angle of incidence on the sample carrier plate, the illumination axes of the sources being all different, and an observation system for the sample carried by the plate. The method may be used for measuring the effectiveness of a cosmetic treatment product on a skin.