Blocker device for eliminating specular reflectance from a...

Details Blocker device for eliminating specular reflectance from a... Blocker device for eliminating specular reflectance from a...

G - Physics

01

N

88/113.18

G01N 21/47 (2006.01) G01N 21/35 (2006.01)

Patent

CA 1255946

ABSTRACT OF THE DISCLOSURE Diffuse reflectance spectra may be obtained that are free from the distortions caused by specular reflections by using an apparatus and method for physically blocking out specularly reflected energy. The apparatus consists of ablocker that is positioned substantially in contact with the surface of the sample at the region wherein an input beam of energy is focused on the sample. Specularly reflected energy that would otherwise be reflected to a detector is physically blocked by the blocker. That part of the input energy beam that penetrates into the sample is diffusely reflected. Part of the diffusely reflected energy passes under the blocker where it is collected and focused on the detector. The blocker is found to have particular application in the field of infrared spectroscopy of inorganic compounds, particularly compounds having a powdered structure.

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