Radiance & Irradiance Measurements

Product Name : Radiance & Irradiance Measurements

Description :

Radiance measurements are carried out to determine the amount of radiant intensity per unit projected area [W/m²/sr] and are measured using a lens system as optics to target at diffuse surfaces [e.g. OLED or display panels]. Irradiance defines the amount of radiant flux incident on an object’s surface, typically expressed in power per unit of surface [W/m²]. Typically, irradiance measurements are carried out with a spectrometer equipped with a cosine corrector with a predefined diffuse measurement surface. These devices are capable of showing the spectral power distribution, as well as showing parameter such as colour, CCT, CRI, dominant & peak wavelength, PAR values, illuminance and luminous intensity. Irradiance measurements for large and high power light sources can also be carried out by means of a spectroradiometer connected to an integrating sphere setup. Admesy offers complete solutions to carry out irradiance measurements for various types of light sources like for example LED or incandescent lamps. The table below shows an overview of Admesy’s spectroradiometers suitable for radiance and irradiance measurements including their spectral ranges. More information about the measurement procedure can be found in the application guide.

Selection Guide

Lighting Rhea Hera Cronus 
 Radiance [W/m²/sr] Lens Lens Lens
 Irradiance [W/m²] Cosine corrector Cosine corrector Cosine corrector
 Radiant intensity [W/sr] Cosine corrector Cosine corrector Cosine corrector
 Spectral range  300-900nm  380-780nm 380-780nm
200-1100nm 360-830nm
Custom WL range 200-1100nm
 Low luminance    
Model Description Price (USD)
Rhea Series High End Spectrometer
Hera-Lens Compact High End Spectrometer for Display Measurement
Hera-CC Compact High End Spectrometer for Lighting Measurement
Cronus-Lens Spectrometer & Colorimeter In One for Display Measurement
Cronus-CC Spectrometer & Colorimeter In One for Lighting Measurement
Cronus-B Spectrometer & Colorimeter In One for Light Bulb Measurement