Source Imaging Goniometer SIG-400

imaging goniometer

Precise Measurement Of Near-Field Luminous Intensity Small Light Source

Radiant Vision Systems SIG-400 is built and designed specifically for LEDs and small light source by capturing image data describing the spatial structure of the luminance and chromaticity of the light source from multiple viewing angles. 

The SIG-400 is Radiants 4th generation Source Imaging Goniometer. SIG-400 can be applied to a broad range of measurement applications by merging our latest advances in imaging colorimetry, robust mechanical design, industry-leading accuracy, and easy-to-use control software. It provides a cost-effective solution by focusing on the needs of LED measurement applications.

The SIG-400 system consists of a ProMetric® Imaging Colorimeter, a goniometric assembly for positioning the imaging colorimeter and the light source relative to one another, and SIG 2.0 Control and Analysis Software. The SIG-400 captures images of the light source from multiple angles, building a 3-dimensional spatial image of the color and luminance output of the light source. These measurements are aggregated into a Radiant Source Model™ (RSM) format, which is a detailed, industry-standard model for representing a light source’s near-field data. RSMs are used to compare the optical properties and designs of various LEDs and to generate input to the most common optical design software packages for use in luminaire and optical system design. Learn more


LED Design | LED Package Design | LED Characterization | Provide LED Model  To Customer

Radiant Vision Systems SIG-400

  • Optimized for LED die and device measurement
  • Multiple optical configurations for field of view and resolution
  • Provides near-field models for luminance and color
  • Generates Radiant Source Model™ (RSM) files with integrated image data for complete analysis
  • Easy and intuitive setup for optional spectrometer

System Recommendations

  • 3.0 GHz and 8 cores
  • 16 – 32 GB RAM
  • Windows 7 or 10, 64 bits
  • Dual-monitor video output
  • Ethernet 100/1000 or USB 2.0

Radiant Vision Systems SIG-400

Optical specifications and Capabilities
CCD TypeInterline cooled and temperature-stabilized CCD
System Dynamic Range>60 dB
Resolution600 x 6001081 x 1081
Extended FOV: Micro
(with SIG-400MF20 option)
0.6 mm1.3 mm
Extended FOV: Micro
(with SIG-400MF0 option)
1.1 mm2.4 mm
SIG-400EF98 mm212 mm
Color Meausrement ¹CIE 1931 matched XYZ filters 
Neutral Density FiltersND 0, 1, and 2 standard; up to ND 5 optional
Measurement CapabilityLuminance, luminous intensity
Color: CCT; CIE x,y; u’,v’; ∆E
Mechanical Specifications
Overall Size71 cm x 56 cm x 125 cm
Operating Footprint74 cm x 127 cm
Azimuth Motion0° ~ 360°
Angular Step Size0.10° minimum for both azimuth motion and inclination
Run Out0.015 mm mechanical-optical-software run out
Weight130 kg
ConstructionWelded steel frame for thermal stability and rigidity

Specifications subject to change without prior notice
¹ Photopic-only option available for purchase