Optics: measuring and testing – Of light reflection
Patent
1986-04-29
1988-04-19
Rosenberger, R. A.
Optics: measuring and testing
Of light reflection
G01N 2155, G01N 128, A61B 1000
Patent
active
047385375
ABSTRACT:
A take-up strip is applied to the element to be investigated, (for example the skin or the hair of a living subject), for a given time and with a given pressure; the side of this strip intended to come into contact with the element to be investigated is matt; the quantity of light reflected by the matt side of the strip is measured before and after impregnation with the greasy product: the quantity of the greasy product located on the surface of the element investigated is derived from the reflection measurement. The detection means is constituted by a phototransistor whose output signal is processed by an analog/digital converter associated with a programmable computer; the strip is disposed on a displaceable support. The reflection reading all along the strip gives a brightness curve in accordance with the location on the strip. For the hair, this curve reflects the greasy aspect from the root to its tip.
REFERENCES:
patent: 4030837 (1977-06-01), Kojima et al.
patent: 4313393 (1982-02-01), Barbuscio et al.
patent: 4480921 (1984-11-01), Leveque et al.
Patents Abstracts of Japan, vol. 6, No. 175 (P-141) [1053], Sep. 1982, & JP-A-57 90 161 (Rikoo Tokei K.K.).
Grollier Jean-Francois
Krien Paul
Yquel Jean-Pierre
"L'Oreal"
McGowan S.
Rosenberger R. A.
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