Physikalisch-Technische Bundesanstalt

Tasks

• Realisation, maintenance and dissemination of the scales of the diffuse reflection, standardising laboratory of the ISO
  
  
• Measurement and calibration of diffuse spectral reflection classification numbers in different geometries
  
  
  • Hemispherical-directed geometries (sphere geometries): spectral radiance factor β(λ)
    
    
  • Directional/directional geometries (gonioreflectometry): Directional/directional geometries (gonioreflectometry): spectral radiance factor β(λ), spectral radiance coefficient q(λ), bi-directional reflectance distribution function f_r (BRDF)

• Development of novel measurement procedures for integrating sphere and gonio reflectometry
  
  
• Colour classification of white sugar
  
  
• Characterisation of the visual appearance of diffuse surfaces in multi geometry configurations

• EURAMET Project 6 "Reflectance of diffusing materials"
  
  
• EURAMET Project 582 "Investigation into the differences between diffuse reflectance measured (by conventional sphere based and goniophotometric techniques)"
  
  
• EURAMET Project 619 "Key-Comparison of Spectral Diffuse Reflectance (EUROMET.PR-K5)"
  
  
• Third-party funded projects with industry in the field of reflectometry

• DIN, EURAMET, CIE