Ocean Optics - Inventor of the World's First Miniature Spectrometer
Ocean Optics - Inventor of the World's First Miniature Spectrometer
 

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Ocean Optics - Inventor of the World's First Miniature Spectrometer
 

Cosine Correctors for Emission Collection

Cosine correctors are optical diffusers that couple to fibers and spectrometers to collect signal from 180° field of view.

Cosine correctors are frequently specified for applications 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. Solar irradiance measurements are also performed with cosine correctors.

The diffusing materials in our cosine correctors comprise thin disks of opaline glass, PTFE or Spectralon® nestled in stainless steel barrels.

 

 

Cosine correctors have 180° FOV and 3.9 mm aperture.

 

Cosine correctors are diffusers that attach to the end of an SMA 905-terminated optical fiber or directly to the spectrometer (below).

 

 

  CC-3 CC-3-UV-S CC-3-UV-T CC-3-DA
Diffusing material: Opaline glass Spectralon PTFE Spectralon
Wavelength range: 350-1000 nm 200-2500 nm 200-2500 nm 200-2500 nm
Dimensions: 6.35 mm OD 6.35 mm OD 6.35 mm OD 12.7 mm OD
Attaches to: Fiber Fiber Fiber Spectrometer
Field of View: 180° 180° 180° 180°
Replacement diffuser? No Yes Yes Yes*

* Provided cosine corrector is not permanently fixed to the spectrometer. This may be the case with spectroradiometrically calibrated setups that must remain undisturbed to maintain calibration.

Example Application -- Solar Irradiance
In this application, we used a direct-attach cosine corrector to collect solar radiation from 180° FOV.

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