Products & Services
Photometry is the measurement of electromagnetic radiation weighted by the response of the human eye, known as the V(λ) function. NPL has extensive facilities for characterising all kinds of light source including a new goniometer facility which can characterise both the wavelength and spatial distribution of the output from a source. Recent enhancements to NPL’s capability include the characterisation of LED-based sources including hazard assessment to EN60825.
Photometry & Sources products & services
- NPL is unquestioned in its ability to measure and characterise all kinds of light source accurately, calibrate instruments, and supply standard lamps and detectors.
- NPL has established a world class reputation for surveying commercial and industrial lighting installations and for designing and making high accuracy light measurement instruments.
- Tungsten filament or halogen lamps can be calibrated, with UKAS accreditation, for spectral irradiance.
- Spectral and luminous flux scales are now disseminated directly using the NPL goniospectroradiometer.
- The relative and absolute spectral irradiance of deuterium lamps is measured over the wavelength range 200 nm to 400 nm.