Topcon Spectroradiometers
Measure Luminance, Chromaticity, CCT, Spectral distribution of LCDs, LEDs, OLEDs, FPDs, Lights, more

Topcon SR-5100 2D Spectroradiometer



Spectrum measurement with
5 Megapixel CCD image sensor
Luminance Range: 0.005 – 17,000,000,000 cd/m²

Topcon SR-5A Spectroradiometer

SR-5 Series

High Dynamic Range

High sensitivity and high
dynamic range spectroradiometer
Luminance Range: 0.0001 – 500,000,000 cd/m² (SR-5AS)

Topcon SR-UL2 Ultra-Low Luminance Spectroradiometer


Ultra-Low Luminance

Measure low luminance quickly at
around 17sec for 0.005 cd/m²
Luminance Range: 0.0005 – 300,000 cd/m²

Topcon SR-UL1R Ultra-Low Luminance Spectroradiometer


Ultra-Low Luminance

Ideal for high contrast flat panels,
instrument panels, light sources
Luminance Range: 0.001 – 300,000 cd/m²

Topcon SR-3AR Spectroradiometer



High sensitivity and wide
dynamic range spectroradiometer
Luminance Range: 0.1 – 300,000 cd/m²

Topcon SR-LEDH Ultra-High Speed Spectroradiometer


Ultra-High Speed

Meets high speed and accuracy requirements in production / QC
Luminance Range: 10 – 4,500,000 cd/m²

Topcon SR-NIR Near-Infrared Spectroradiometer



Measure near-infrared spectral from
600nm to 1030nm

Want to find out more?

If you are interested in more information, send us an inquiry.

Applications Include

Optical measurements for product design, engineering, R&D, QA/QC, and compliance testing of a variety of displays and lighting products including:

  • LED backlights
  • LED lighting
  • HDTVs, laptops, tablets
  • Smart phone displays
  • Automotive lighting
  • Automotive displays
  • Aerospace displays
  • Traffic signals
  • Outdoor displays
  • Digital signage
  • Industrial equipment
  • Consumer electronics
  • and more…
Spectroradiometer Measuring LCD with Test Pattern

How do Spectroradiometers measure light?

Unlike color filter colorimeters which use optical filters to measure CIE tri-stimulus values (X,Y,Z), spectroradiometers use a diffraction grating, relay optics, and a CCD sensor to measure the sampled light dispersed by wavelength.

The visible band “rainbow” of light falling on the sensor is converted to electrical signals which are captured, corrected, processed, and reported as an array of radiance values and derived colorimetric results.

The CIE XYZ values are computed from the full array of spectral data using precision math functions (standard tri-stimulus integrals) prescribed by the CIE.