Multispectral reflectometer

Details Multispectral reflectometer Multispectral reflectometer

G - Physics

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73/55

G01N 21/17 (2006.01) G01J 3/42 (2006.01) G01N 21/47 (2006.01) G01J 1/18 (2006.01) G01J 1/44 (2006.01) G01J 3/02 (2006.01) G01J 3/18 (2006.01)

Patent

CA 2035224

SEQ-228 (Kolls) MULTI SPECTRAL REFLECTOMETER ABSTRACT OF THE DISCLOSURE A reflectometer for measuring absorption of light in selected regions of the light spectrum by a diffuse reflector. The relectometer is adapted to precisely measure absorption resulting from the constituents present in body fluids. The sample to be measured is illuminated by a focused light source at an angle of 45° to its surface. The light diffusely reflected about the normal to the sample falls on a small round bundle of optical fibers. At the opposite end of the bundle, the fibers are arranged into a narrow rectangle. This rectangle forms the entrance slit for a concave holographic diffraction grating. The grating forms images of this entrance slit spectrally separated over a flat field suitable for recording the spectrum on film or on an array of discrete detectors.

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