Patent 7952716 was granted and assigned to Bayer Healthcare on May, 2011 by the United States Patent and Trademark Office.
Improved performance in reflectance photometry is obtained by employing an optical fiber to direct collimated light to a test area and to return both diffuse and specular light from the test area. Specular light is prevented from reaching a light detector by a spatial filter, while diffuse light is collected and measured.