Information about the luminance and color of light emitted or scattered by a device or object can be represented in many ways. The specific measurement requirement in an application will be dependent on the sort of information required. For example, the distribution of the light output of a source may be of interest for lighting system design, or the color and luminance of a display screen may need to be measured on a grid.

Radiant Imaging measurement systems provide the capability to measure a broad range of optical quantities, including:

• Basic quantities, such as luminance, illuminance, radiance, irradiance, color coordinated, correlated color temperature (CCT), dominant color, and more
• Spatial distributions, such as near-field luminance (and color) distribution, far-field luminous intensity distributions, illuminance distributions, and bi-directional reflectance and transmission distribution functions (BRDF and BTDF)
• Uniformity and variations in color and luminance — which also enables defect detection
• Color and luminance for arrayed light sources and lit features or patterns

Each of these measurements can then be used to characterize a light source, display, or material for R&D, production, or field applications.

The correct measurement solution results in better data, faster decision-making, and lower cost. Radiant Imaging’s broad array of measurement systems — such as PM Series™ Imaging Colorimeters and Photometers, Source Imaging Goniometers®, Imaging Spheres™, and FPMS measurement systems — and measurement control, analysis, and application software provides efficient, cost-effective solutions to most color and luminance measurement problems.