Physikalisch-Technische Bundesanstalt

Derivation and dissemination of the photometric unit for the luminous flux and the related angular dependence and colorimetric characteristic quantities like luminous intensity distribution, distribution temperature and tristimulus values, as well as the specific characteristics for semiconductor radiators with non-coherent radiation

Close cooperation with the industry focused on a contemporary transfer of the developed novel methods and the resulting experience in the industrial applications.

• Goniophotometry/Goniocolorimetry for medium sized sources up to 2 m length routine work of the robot-goniophotometer (6 m effective diameter) for photometric measurements and in the neighbored UV and NIR spectral regions
  
  
• Goniophotometry/Goniocolorimetry for LEDs Determination of the angular emittance of  LEDs (1,5 m effective diameter) including the characteristics "CIE luminous intensity average LED A, B" and "CIE partial luminous flux"

• Developments for the traceability of goniophotometric nearfield/farfield measurements
  
  
• Development of LED-transfer standards for the transfer of photometric units, the values of specific characteristic quantities and/or colorimetric characteristic numbers
  
  
• EUROMET Major Investment: 10025 “Universal Robot-Based Goniophotometer“
  
  
• EUROMET Major Investment: 10021 “Facility for directional and spatially distributed photometric quantities“
  
  
• EUROMET: Project 811 “Traceability of luminous intensity and luminous flux using transfer standard lamps“
  
  
• EUROMET: Project 569 “Key-Comparison of Luminous Intensity (EUROMET.PR-K3a) and Luminous Flux (EUROMET.PR-K4)“
  
  
• Third party projects focused on traceability of photometric and radiometric units as well as colorimetric characteristic numbers from PTB to industries