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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


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 (4-7 June) and CIE Division 1 and Division 2 annual meetings in Paris (30 May-1 June, proposed).

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 is planned to include the following sessions (see the attached announcement for more details about the provisional programme):

  • Session 1 History of V(λ) and photometric units
  • Session 2 History of 1931 CIE Colorimetry and Cone Fundamentals
  • Session 3 Photometry with Cone Fundamentals
  • Session 4 Discussion for future directions for photometry and colorimetry

Invited speakers include Peter Blattner (CIE Past President), Tony Bergen (CIE Vice President-Technical and convenor of CIE RF05), Lorne Whitehead (CIE TC 1-98 Chair), Yoshi Ohno (CCPR WG-SP TG16 Chair), Jennifer Veitch (CIE), and Andrew Stockman (UK).

Further speakers are to be announced.


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.

Attendees other than speakers need to register online using the form below.
Speakers will be invited separately.


Deadline of the registration is: 3 May 2024.


Working documents


Second Announcement

Steering committee


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