Device for use in chromatometry of samples

Details Device for use in chromatometry of samples Device for use in chromatometry of samples

1982-11-12

1986-04-22

Evans, F. L.

Optics: measuring and testing

By shade or color

356446, G01J 350

Patent

active

045838585

ABSTRACT:
The invention relates to a device for use in chromatometry of samples, viz. olored surfaces, by measurement of reflectance. It comprises a testing head having a measuring cell and a measuring surface. The measuring cell is provided in each of five radial planes with three optical fibre bundles for irradiation of the sample, said optical fibre bundles being disposed at three different angles of e.g. 15.degree., 30.degree. and 70.degree. to the measuring surface. In the center at the top of the measuring cell there is also provided an optical fibre bundle oriented perpendicular to the measuring surface and intended to divert the radiation reflected from the sample. According to the invention a switching system is provided which permits selectively to turn on or off a part of the total number of optical light guide means, especially in accordance with a plurality of preselectable programmes.
The device according to the invention, which comprises a portable testing head, is particularly intended for color measurements of the paint or enamel on passenger car bodies and/or measuring structural paints or enamels and/or such paints containing metal particles.

REFERENCES:
patent: 3999864 (1976-12-01), Mutter
patent: 4218144 (1980-08-01), Whitehouse et al.
patent: 4412746 (1983-11-01), Yokouchi

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