When you require a large area (up to 600mm in diameter), highly uniform light source for  camera and image sensor calibration, the SpectralLED®  Large Output Port delivers brightness, radiometric stability  and  wavelength accuracy that is unmatched in the industry. The SpectralLED Tunable Light Source incorporates up to  35 discrete wavelengths for synthesis of commercially  available light sources or based on spectra that you import.  The platform is easily adaptable for automated test systems  and production line integration, with integrated optical  feedback and temperature control to ensure rock-solid  stability and consistent results.


  • Large area camera and image sensor calibration
  • Large area photodiode detector responsivity characterization
  • Spectrum / illuminant simulation
  • Diagnostic medical imaging
  • Technical and industrial photography

Unprecedented Resolution & Accuracy

  • Wavelength options from the UVA to the Near Infrared
  • Quickly simulate any CIE Illuminant or Macbeth™ / X-  RITE™ Color Patch
  • Built-in RMS spectral fitting for simulation of user imported spectra
  • Constant current drivers & built-in optical feedback ensure accurate & flicker-free output in real-time
  • All solid-state design for rapid start-up, repeatable performance and long operating lifetime
  • ISO/IEC 17025 accredited by NVLAP (NVLAP lab code 200823-0) for calibration accuracy
Please contact us with your custom & OEM requirements.
  RS-7-2 Specifications
 Source Geometry  150mm, 300mm or 600mm diameter uniform output, Lambertian radiant source  (Other output port sizes available on request)
 Spatial Uniformity  ≥ 99%
 Optical Geometry  Integrating sphere with 500mm, 1,000mm or 1,500mm diameter  (Other sphere sizes available on request)
 Radiance Range  Dependent upon integrating sphere size and number of light engines attached. Please consult with factory for  configuration parameters and output specifications.
 Luminance Range
   Optical Specifications
Spectral Range  380 nm to 1,000 nm  (Custom ranges available on request)
 Spectral Output  32 discrete LED channels, 3 broadband LED Channels Visible resolution ~ 15 nm, NIR resolution ~ 50 nm (typical channel spacing)
 Spectral Bandwidth  Typical: Visible 20nm FWHM, NIR 50nm FWHM
 CCT Range  1,900K to 40,000K
 Preset Spectra  CIE Illuminants A, B, C, D50, D55, D65, D75, E, F1-F12, MacbethTM / X-RiteTM Color Patches
 Custom Preset Spectra  Configurable at time of order via API. Contact factory for details
   Accuracy Specifications
 Illumination Stability  ≥ 99.99% after 50 ms for radiance or after 2,000 ms for color
 Illumination Accuracy  ± 1% Absolute, NIST traceable
 Spectral Accuracy  ± 1 nm centroid wavelength
 Color Accuracy  CIE 1931 x, y ± 0.003
 Linearity  < 0.1 % RMS of full scale
 Temperature Stability  Within ± 1° C via active TEC
 Long-term Drift  Output ≤ 2%  Spectral ≤ 1 nm  (channel dependent)
  Electrical Specifications
 Electrical Resolution  16 bit DAC for channel current drivers  24 bit ADC for internal radiance monitor feedback
 Dynamic Range Adjustment  4-5 decades typical  (spectrum dependent)
 LED Control  Pure DC constant current with floating differential sensing
   General Specifications
 Software  Firmware includes full spectral calibration with spectral fitting, preset storage, real-time optical feedback,  radiometric and  photometric units supported
 Interface Connectors  USB 2.0 type B and DB-9
 Interface Protocol  Simple ASCII commands with optional binary block transfer
 Supported Operating Systems  USB drivers for Windows, OSX and Linux via FTDI virtual COM port  Legacy RS-232 serial port for integration (no OS required)
 Input Voltage and Power  100 to 240 VAC at 50-60Hz, 600W maximum
 Light Engine Dimensions  Dependent on integrating sphere chosen – please contact factory for details
 RS-7 Wavemon™  Multi-channel photodiode system provides amplitude feedback & real-time wavelength measurements
 Specifications are subject to change without notice.

Configuration Options

Sphere DiameterMax Exit Port DiameterNumber of SpectralLED®
 0.5 meters 150 mm 1 to 2
 1.0 meters 300 mm 1 to 4
2.0 meters 600 mm 1 to 8


RS-7 WavemonTM   Multi-channel photodiode system with amplitude feedback and real-time wavelength measurement

The Wavelength Monitor System is a multi-channel photodiode system which provides amplitude feedback and real-time wavelength measurements. It consists of three photodiodes each with an independent transimpedance amplifier circuit. Proprietary optical filtering techniques allows for wavelength accuracy of +/-0.25nm and repeatability of +/-0.05nm. The Wavelength Monitor PCBA, photodiodes, and optical filter assembly is temperature stabilized using a Peltier cooler and thermistor in a PID feedback loop. This assembly is a discrete module which can be used with any RS-7 model.

Please contact us with your custom & OEM requirements.