Consultative Committee for Photometry and Radiometry ‐ CCPR

Dr Takashi USUDACCPR President and CIPM member(NMIJ Japan)

25th meeting of the CGPM

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Scope of the CCPR

Consultative Committee for

Photometry……………………

Radiometry……………….…..

Metrology related to the physical measurement of the properties of electromagnetic radiation, including visible light

Describes the effects of visible light on the human eye, in terms of brightness (photometry) and colour(colorimetry)

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Major events in CCPR

1875 Creation of Metre Convention

– 1880 Invention of Long lasting filament

1931 Adaption of luminous function

1933 Establish of CCP (Photometry)

– Commercialization of fluorescent lamp

1971 Establish of CCPR

1979 Adaption of current definition of the Candela

1999 ~ CIPM‐MRA

– Commercialization of solid state lamp

~ 16 lm/W

~ 100 lm/W

250 lm/W~

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2003 Closure of Photometry Section at the BIPMSource-base standard to detector-base standard

Equivalency is maintained by international cooperation under CCPR

Major events in CCPR

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Areas of priority and potential

EnergyPhoto voltaicSolid State Lighting (LED, OLED)

Environment and climateOptical radiation balance (incoming tooutgoing) monitoring, affecting globalwarming

Health and Quality of lifeUse of optical radiation for both diagnosisand treatment

SecurityTHz industry for communication,spectrometry, imaging, Photon basedcryptography

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Stakeholder involvement

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Achievements 2011 ‐ 2014

Two CGPM resolutions recognizing the importance of the use of SI‐traceable units in studies related to climate changeThrough cooperation with the CCPR, theWMO is replacing its conventional WorldRadiometric Reference (WRR) for solarirradiance measurements by SI‐traceablemeasurementsNew member CMI Czech Republic andobserver CMS/ITRI Chinese Taipei

Creation of several Task Groups to investigate metrology needs and tofoster cooperation in emerging fields: fibre optics, few‐photon metrology,THz metrology.

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Economic Impact

BERLIN AT NIGHT http://www.esa.int/

Energy consumptionImprovement of luminous efficacy of LED luminaires by 1% will then finally saveelectrical energy of value 4 billion €/year globally

Energy productionFinancial uncertainty of solar cell calibration

= 30 GW/year x1.7 €/W x 1 % = 500 M€/year Environmental and climate foreseen

Economic losses by natural disaster (Extreme temp., flood, storm,..) 2.4 TUS$(1970‐2012)

Production and quality control700 B US$ is the estimated value of shipments in industries (automotive,printing, etc.) for which unacceptable appearance may result in “NO SALE”

Thank youConsultative Committee for PR / Dr Takashi USUDA