Measuring a surface characteristic

Optics: measuring and testing – By polarized light examination – Of surface reflection

Reexamination Certificate

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C356S237200

Reexamination Certificate

active

07742168

ABSTRACT:
At least one surface characteristic of a sample, e.g. gloss, refractive index, micro-roughness, macroroughness, colour shift, is determined by illuminating a surface of the sample with a collimated beam of light at an angle to the plane of the surface and using an imaging detector to record an intensity and angular distribution image of the light from the beam reflected from the surface.

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patent: 2002/0171826 (2002-11-01), Wiles et al.
patent: 2277148 (1994-10-01), None
patent: 2277148 (1994-10-01), None
International Search Report with Written Opinion of the International Searching Authority dated Jul. 30, 2004 for corresponding International Application No. PCT/GB2004/001634, filed Apr. 15, 2004, 9 pgs.

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