Multiangular color measuring apparatus

Details Multiangular color measuring apparatus Multiangular color measuring apparatus

G - Physics

01

J

G01J 3/52 (2006.01) G01J 3/46 (2006.01) G01J 3/50 (2006.01) G01N 21/47 (2006.01) G01J 3/02 (2006.01)

Patent

CA 2077498

MULTIANGULAR COLOR MEASURING APPARATUS Abstract of the Disclosure A spectrophotometer apparatus (200) is adapted to provide spectral reflectance measurements of object, particularly optical characteristics of colored surfaces comprising metallic or pearlescent particles. The apparatus (200) comprises a source light and a reflection optics assembly. Signals representative of reflected light are analyzed and data is generated representative of the spectral response characteristics of the object sample. The apparatus employs a plurality of fiber optic bundles for receiving light reflected from the object sample, with each of the fiber optic bundles being positioned at one of a corresponding plurality of fixed angles different from the angle of illumination by the source light. Reflectance is measured at each angle by sequential switching such that light is impaired from being received from all but one of the plurality of multiple angles. Light received from the fiber optic bundles is transferee to a single array of integral interference- filter/photodiode devices which modulate the light and determine the spectro characteristics thereof. With the use of fiber optic devices, a single source of illumination and a single optical detector arrangement, the spectrophotometer apparatus is employed within an optimally small packaging configuration, and the apparatus can be maintained in a portable mode while maintaining relatively high accuracy and repeatability. -48-

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