Gamma Scientific RS-7 Uniform Light Source


Offering easy spectral simulation capabilities, a high number of unique LED channels, and blindingly bright output power, nothing else on the market compares to the SpectralLED.

And just because it’s easy to use doesn’t mean you have to sacrifice performance or accuracy. Gamma Scientific’s proprietary spectral calibration techniques and powerful spectral fitting engine allow for unsurpassed precision and repeatability in the output spectrum, all seamlessly integrated into the unit firmware.

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Gamma Scientific RS-7 Uniform Light Source



Standard Models

RS-7-1:  80° FoV with 75mm output port

RS-7-6:  180° FoV with 75mm output port


  • Unprecedented Resolution and Accuracy – 32 Discrete LED Wavelengths Covering the Visible and NIR
  • Powerful Synthesis Engine – Quickly Simulate any CIE Illuminant or Macbeth™ / X-RITE™ Color Patch
  • Flexible Interface – Built-in RMS Spectral Fitting for Simulation of Any User Imported Spectra
  • Uniform 75mm Radiance Output Port or Optional Baffle Tube for Irradiance
  • Easily Adaptable – for Automated Test Systems and Production Line Integration
  • Pure DC Constant Current Drivers and Built-in Optical Feedback Photodiode System – Ensure Accurate Output in Real Time
  • On-board Thermal Electric Cooler and Feedback – for LED Temperature Control
  • ISO/IEC 17025 NVLAP Calibration Laboratory (Lab Code 200823-0) – Ensures Superior Wavelength and Color Accuracy

Industry Applications

  • Camera and Image Sensor Calibration (CCD, CMOS, etc.)
  • Ambient Light Sensor Calibration
  • Detector Responsivity
  • OEM Camera Manufacturing
  • Spectrum/Illuminant Simulation
  • Diagnostic Medical Imaging
  • Technical and Industrial Photography


Measurement Applications

  • White Balance
  • Quantum Efficiency
  • Spatial Non-Uniformity
  • Pixel Defects
  • Cross Talk
  • Vignetting Correction
  • Sensitivity
  • Signal-to-Noise
  • Linearity
  • ISO Speed
  • Saturation Exposure
  • Dynamic Range



Spectral Range 380nm – 1000nm (Standard Version, Custom Configurations Available)
Spectral Output 32 Discrete LED Channels, 3 Broadband LED Channels
Visible Resolution ≈15nm, NIR Resolution ≈50nm (Typical Channel Spacing)
Spectral Peaks1 395nm, 405nm, 420nm, 430nm, 450nm, 460nm, 475nm, 495nm,
505nm, 520nm, 525nm, 535nm, 570nm, 595nm, 610nm, 700nm,
620nm, 630nm, 637nm, 660nm, 675nm, 685nm, 715nm, 730nm,
750nm, 760nm, 780nm, 805nm, 850nm, 895nm, 940nm, 965nm,
2700K Warm White, 3000K Warm White, 6500K Cool White
(Standard Version, Custom Configurations Available)
Spectral Bandwidth Channel Dependent
Visible Typical ≈20nm FWHM, NIR Typical ≈50nm FWHM
Source Geometry 75mm Diameter Uniform Output, Lambertian Radiant Source
Spatial Uniformity2 ≥ 97%
Optical Geometry Built-in Integrating Sphere, 200mm Diameter
(Other Output Geometries Available for Projection or Illuminator Applications)
Radiance Range3 Typical Maximum ≈ 15,000μW/cm²/sr  Typical Minimum ≈ 15μW/cm²/sr (Spectrum Dependent)
Luminance Range3 Typical Maximum ≈ 30,000cd/m² Typical Minimum ≈ 30cd/m² (Spectrum Dependent)
CCT Range 1,900K – 40,000K
Preset Spectra CIE Illuminants A, B, C, D50, D55, D65, D75, E, F1-F12,
Macbeth™/X-Rite™ Color Patches
Custom Preset Spectra Arbitrary Spectra can be Configured as Presets Using API
Gamma can Provide Factory Loaded Custom Presets, Use Part Number RS-7-PRE
(Spectral Information must be Provided by Customer at Time of Order)
Illumination Stability ≥ 99.99% after settling
(Channel Dependent, Settling Occurs After ≈50ms for Radiance and ≈2000ms for Color)
Illumination Accuracy ± 1% Absolute NIST Traceable, Calibration Stored Internally
Spectral Accuracy ± 1nm Centroid Wavelength
Color Accuracy CIE 1931 x,y = ±0.003
Linearity < 0.1% RMS of full scale
Temperature Stability Active Thermoelectric Cooler with Feedback, Temperature Control within ± 1 C°
Long Term Drift Output: ≤ 0.2%
Spectral: ≤ 1nm (Typical, Channel Dependent)
Electrical Resolution 16 bit DAC for Channel Current Drivers
(64 Independent DACs, Certain LED Channels Require Multiple Current Drivers)
24 bit ADC for Internal Radiance Monitor/Feedback
Dynamic Range Adjustment Spectrum Dependent, 4-5 Decades Typical
LED Control Pure DC Constant Current with Floating Differential Sensing
Software Firmware Contains Full Spectral Calibration and Handles Spectral Fitting, Preset Storage, Real-time Optical Feedback, Radiometric and Photometric Units Supported.
Interface USB 2.0 Type B Connector and DB-9 Connector
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 into Automated Systems (no OS required)
Input Voltage and Power 110-240 VAC, 50-60Hz, 600W Maximum
System Dimensions Height: 405mm (16in), Width: 460mm (18.1in), Depth: 305mm (12in), Weight: 17.5kg (38.6lbs)
RS-7-1 75mm Output with Radiance Calibration.  80ª FoV
RS-7-2 1-meter Integrating Sphere with 300mm Uniform Output Port with Radiance Calibration.  Compatible with up to 4 sets of RS-7 Drive Electronics Running in Parallel to Deliver Increased Output Power.
RS-7-3 Fiber Optic Output with Irradiance Calibration
RS-7-4 Wafer Testing Configuration with Irradiance Calibration
RS-7-5 150mm Baffle Tube Output with Irradiance Calibration
RS-7-1-IRISUPG Iris Upgrade for the RS-7-1. Variable Output Aperture using built-in motorized iris. RS-7 Firmware includes iris stepper motor control. Additional API commands are provided for easy adjustment of iris diameter.
RS-7-WAVEMON Multi-channel photodiode system provides amplitude feedback and real-time wavelength measurements. This assembly is a discrete module and can be used with any RS-7 optical configuration.
1. LED output wavelength can vary slightly from unit to unit, actual peak wavelength is typically ±5nm from the specified peak.
2. Uniformity measured using an 8° FOV at the output plane of the device. Uniformity spec is measured over the entire Ø 75mm active area, when considering only the center Ø 50mm area uniformity exceeds 98%
3. Spectra fit over a wavelength range of 380-780nm, maximum output is dependent on spectral content of the target spectra. Most CIE illuminants and color patches can fit to at least this level, typically spectra can far exceed this maximum, however some spectra cannot achieve this maximum