Integrating Sphere Measurements

The integrating sphere is capable of measuring the total light output of lamps, LEDs, luminaires and LED clusters. Pro-Lite can provide contract measurements in either a 25cm or 100cm sphere. Measurement parameters are:

• Spectral radiant flux (Watts per nm)
• Luminous flux (lumens)
• Radiant flux (Watts)
• Chromaticity, Cx Cy, u' v'
• Correlated colour temperature (Kelvin)
• Dominant wavelength (nm) and purity
• Peak, centre, centroid wavelength (nm)
• Bandwidth, FWHM (nm)
• Colour rendering, CRI (Ra)

» Download sample integrating sphere measurement report

» Request a quotation for integrating sphere measurements

Imaging Sphere™ Measurements

The Imaging Sphere™ from Radiant Imaging is the fastest angular light measurement instrument available today. It captures the full 2π hemispherical angular luminous intensity and colour variation of small light sources (e.g. LEDs) in seconds. For displays, the Imaging Sphere rapidly measures view angle as well as luminance and colour variation with direction of view. The Imaging Sphere also functions as a high speed BRDF scatterometer, characterising the reflectance and transmittance properties of material in seconds. Measurement parameters are:

• Luminous intensity vs.angle
• Luminance vs. angle
• View angle
• Chromaticity vs. angle 
• Colour temperature vs. angle
• Reflective scatter, BRDF
• Transmissive scatter, BTDF

» Request a quotation for Imaging Sphere measurements

ProMetric™ CCD Imaging Photometer Measurements

ProMetric™ CCD Imaging Photometers are digital cameras which provide calibrated measurements of the spatial light variation from light sources. Compared to traditional "spot" photometers, a ProMetric™ photometer measures the brightness at millions of locations on the light source. ProMetric™ cameras are used to measure a wide range of sources, including flat panel displays, LEDs, automotive instrument clusters, traffic signals and signs, interior lighting and automotive headlamp performance. Pro-Lite's PM-1423E-1 camera is a tristimulus-response photometer with 1536 x 1024 pixels. Measurement services are provided both in-house and on-site. Rental of the equipment is also offered.

ProMetric™ cameras provide measurements of the following parameters:

• Luminance (cd/m2)
• Spatial luminance (cd/m2)
• Luminous intensity (cd)
• Illuminance (lux)
• Spatial illuminance (lux)
• CIE chromaticity (Cx Cy, u' v')
• Correlated colour temperature, CCT (K)

» Download sample ProMetric measurement report (displays & signs)

» Request a quotation for ProMetric CCD Imaging Photometer measurements

Radiant Source™ Model Measurements

Radiant Source™ models provide real-life light angular luminous intensity source data as input to optical design and ray tracing programmes, greatly improving their accuracy. Our library of Radiant Source™ Models takes in incandescent, discharge, fluorescent, high pressure sodium, xenon and tungsten halogen lamps as well as LEDs and LED clusters from all of the leading international brands. For a current list of available source models, click here (registration is required). If you don't see the lamp or LED you are interested in using listed, we provide a measurement service - please see the Radiant Source™ Models product sheet for details.

» Download Radiant Source™ Models product sheet

» Request a quotation for Radiant Source™ Model measurements

Reflectance & Transmittance Measurements

Using a research-grade UV-VIS-NIR spectrophotometer for the 250-2500nm range and an FTIR spectrometer for the 2.5-15.0µm range, we can provide measurements of diffuse, specular and total reflectance and transmittance. Measurements of reflectance versus angle are also available. Reflectance measurements are made with reference to  NIST traceable standards. For a list of available measurements, please consult the Standards & Targets section on our recalibration page.

» Request a quotation for reflectance or transmittance measurements