Optical measurements

We calibrate

  • optical radiometers (radiance and irradiance),
  • incandescent lamps (irradiance),
  • optical filters (transmittance).

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We characterise the optical radiometers for:

  • non-linearity,
  • angular response,
  • thermal sensitivity,
  • polarisation effects,
  • inherent straylight effects

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Calibration of irradiance sensors
Irradiance sensors
Wavelength range (290...900) nm
Spectral irradiance* 100 nW m-2 nm-1 ... 500 mW m-2 nm-1
Calibration and measurement capability* (1,1 ...10) %

* Depends on the wavelength
Radiance sensors
Radiance sensors
Wavelength range (350...900) nm
Spectral radiance* 50 nW m-2 sr-1 nm-1 ...100 mW m-2 sr-1 nm-1
Calibration and measurement capability* (1,4 ...16) %
* Depends on the wavelength
 Incandescent lamps
Incandescent lamps
Wavelength range (340 … 900) nm
Irradiance* 100 nW m-2 nm-1 ... 500 mW m-2 nm-1
Calibration and measurement capability* (1,4...3,0) %
* Depends on the wavelength
Optical filters
Optical filters
Wavelength range (300 … 900) nm
Regular transmittance 0,0001…1
Calibration and measurement capability* (0,4 ...10,0) %
* Depends on the wavelength