Cosine Correctors


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Cosine correctors are optical diffusers (opaline glass, PTFE or Spectralon) that couple to fibers and spectrometers to collect signal from 180° field of view. Cosine correctors are specified for setups requiring the redistribution of incident light, such as measuring spectral irradiance of a plane surface in air or other media.

Typical applications include relative and absolute spectral intensity measurements of LEDs, light sources and other radiant sources (including solar). Options are available for connecting to optical fibers or spectrometers.

  • Wide FOV – collects light from 180° field of view
  • Versatile – couples to fibers or directly to spectrometers
  • Irradiance-ready – ideal for intensity measurements of LEDs, light sources and solar sources
Item Diffusing Material Wavelength Range Attaches to:
CC-3 Opaline glass 350-1000 nm Fiber
CC-3-UV-S Spectralon 200-2500 nm Fiber
CC-3-UV-T PTFE 200-750 nm Fiber
CC-3-DA Spectralon 200-2500 nm Spectrometer
CC-S-DIFFUSE Spectralon 200-2500 nm Replacement Spectralon disk for CC-3-UV-S and CC-3-DA
CC-T-DIFFUSE PTFE 200-750 nm Replacement PTFE disk for CC-3-UV-T

Engineering Specifications CC-3 CC-3-UV-S CC-3-UV-T CC-3-DA
Optical diffuser: Opaline glass Spectralon PTFE Spectralon
Wavelength range: 350-1000 nm 200-2500 nm 200-750 nm 200-2500 nm
Dimensions (OD): 6.35 mm 6.35 mm 6.35 mm 12.7 mm
Diffuser (diameter): 3900 µm 3900 µm 3900 µm 7140 µm
Field of View: 180° 180° 180° 180°
Attaches to: Fiber Fiber Fiber Spectrometer
Replacement diffuser: Yes Yes Yes Yes, with restrictions*

* In spectroradiometrically calibrated setups, the CC-3-DA must remain attached to the spectrometer to maintain calibration. Removal of the CC-3-DA to replace the diffuser would require recalibration of the setup.

Applications in which this product is used:

Measurement Techniques in which this product is used:


Application Notes: