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CCPR and CIE joint Workshop '100 Years of V(λ) and the Future of Photometry'

03 June 2024

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CCPR-CIE Joint Workshop

Final Program Abstracts



This workshop is co-organized by Consultative Committee for Photometry and Radiometry (CCPR) and International Commission on Illumination (CIE), and will be held in conjunction with CCPR 26th meeting and CCPR Working Group meetings at BIPM (June 4 – 7) and CIE Division 1 and Division 2 annual meetings in Paris (May 31-June 1).

The workshop will commemorate 100th anniversary of V(λ), overview the history of spectral luminous efficiency functions and CIE colorimetry, and introduce the cone fundamentals published by CIE (2006, 2015), then will discuss the future of photometry and colorimetry with cone-fundamental-based spectral luminous efficiency functions and color-matching functions.


The workshop is intended for researchers, engineers, and stakeholders in academia, industry, national metrology institutes, testing and calibration laboratories, lighting manufacturers, instrument manufacturers, who are engaged in photometry and colorimetry.


The workshop will include the following sessions:

  • Session 1 History of V(λ) and CIE Colorimetry
  • Session 2 Understanding Cone Fundamentals
  • Session 3 Photometry with Cone Fundamentals
  • Session 4 Discussion for future directions for photometry and colorimetry


The workshop will accommodate on-line participants (hybrid).

The registration for the workshop will be no charge. However, due to the limited capacity of meeting facility, a fee for no show for on-site attendance may apply.

Venue information

Detailed information are available here.

Associated meeting schedules


Working documents


Second Announcement

Steering committee



Final Program





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