The Photometry and Radiometry Group establishes national measurement standards for luminous intensity (cd) and radiation temperature (K) as well as for optical materials and the optical communications field. In addition, the group develops and disseminates measurement standards and technologies for these fields. Armed with highly advanced measurement standard technology, the group offers calibration, testing, and performance evaluation services that are vital for key national industries such as lighting and optical communications. Furthermore, the group is also responsible for developing key measurement standard technology for advanced industries such as aerospace, materials, display technology, and quantum computing.
Current R&D Projects
Development of evaluation technology for newly emerging optical sensors
Development of measurement standard technology based on optical materials for Earth observation purposes
Development of mid-infrared lasers
Development of key measurement technologies for optics industry
Recent R&D Highlights
- Establishment of world-class pQED-based spectral responsivity scale in visible range
- Development of measurement technique for detection efficiency of photon counting detectors in the wavelength range of (250 ~ 1600) nm
- Development of color perception metrology and its application for international standardization action
- Establishment of absolute radiation temperature scale based on a 650 nm-band absolute radiation thermometer
- Development of mid-IR spectral total reflectance standard in the wavelength range of (2.5 ~ 12) μm
- Development of 3 μm-band tunable continuous-wave light source
Introducing Teams in a Group
Primary Optical Radiometry Team
The Primary Optical Radiometry Team establishes a world-class optical power standard in the ultraviolet to infrared wavelengths for optical radiometry. Based on the standard, the team provides calibration and measurement services of luminous intensity (unit: cd), radiant intensity (unit: W/sr), radiation temperature (unit: K), and their related quantities. Optical measurement is not only important for conventional optical applications such as lighting and display technology, but it is a key part of advanced science and technology such as aerospace, Earth observation, defense technology, and health care. It is also one of the core parts of temperature scale redefinitions. The team strives to improve measurement accuracy and expand the measurable wavelength ranges to meet the needs of state-of-the-art science and technology based on optical measurement.
Key Research Area
- Development of spectral responsivity measurement technology for ultraviolet ~ infrared photodetectors
- Development of radiation measurement technology for ultraviolet ~ infrared light sources
- Development of precision evaluation technology for photodetectors and spectrometers
- Development of thermodynamic temperature measurement technology based on radiometery
- Measurement services in photometry and radiometry
- Standard illuminants such as spectral irradiance standard lamp, luminous intensity standard lamp, etc.
- Standard detectors such as illuminance meters, colorimeters, spectroradiometers, radiation thermometers, photodiodes, etc.
Optical Material Metrology Team
The Optical Material Metrology Team establishes national measurement standards for quantities related to optical materials and develops integrated measurement technology. In addition to improving measurement accuracy for traditional optical material quantities such as reflectance and transmittance, the team is developing source measurement technologies such as 3D BRDF measurement technology, mid-infrared optical material measurement technology, measurement testing for Earth observations, and metrology for quantifying visual perception of optical materials. Using the developed technology, the team develops and disseminates key measurement standards for advanced industries such aerospace, materials, and display technology.
Key Research Area
- Development of 3D BRDF measurement standard technology
- Development of infrared spectral reflectance measurement standard
- Establishment of a metrological traceability system for Earth observations
- Development of metrology for quantifying visual perception of optical materials
About Other Groups