Method for examining the surface reliefs of a sample and apparat

Details Method for examining the surface reliefs of a sample and apparat Method for examining the surface reliefs of a sample and apparat

1986-10-22

1988-07-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 2186

Patent

active

047587300

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.

REFERENCES:
patent: 2253054 (1941-08-01), Tuttle et al.
patent: 3843227 (1974-10-01), Kato et al.
patent: 3916439 (1975-10-01), Lloyd et al.
patent: 4236082 (1980-11-01), Butler
patent: 4349277 (1982-09-01), Mundy et al.

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